In order to provide for adequate open spaces and the admission thereto of light and air, and to provide adequate visibility to the operators of motor and other vehicles along streets, highways and parkways, and at the intersection thereof, the yards provided in Chapter 22.20 through 22.40 of this title, and the yards and highway lines provided for in this chapter, are created and established as part of a comprehensive system of yard and highway lines covering the unincorporated territory of the county. (Ord. 1494 Ch. 4 Art. 1 § 451.1, 1927.)

A person shall not use any building, structure, equipment or obstruction within any yard or highway line except as hereinafter specifically permitted in this Title 22, and subject to all regulations and conditions enumerated in this title. (Ord. 1494 Ch. 4 Art. 1 § 451.2, 1927.)

Where a different yard requirement is established by Chapter 22.44 or this Chapter 22.48, it shall supersede the yard requirements contained elsewhere in this Title 22. (Ord. 2001-0079 § 4, 2001: Ord. 1494 Ch. 4 Art. 2 § 452.1, 1927.)

On corner lots, through lots with three or more frontages, flag lots, and irregularly shaped lots where the provisions of this Title 22 do not clearly establish location of yards and lot lines, the director shall make such determination. (Ord. 1454 Ch. 4 Art. 2 § 452.2, 1927.)

Front, side and rear yards required by this Title 22 shall be established on the main portion of a flag lot exclusive of the access strip; provided, however, that in lieu of such yards, a uniform distance of 10 feet from all lot lines may be substituted. In addition, the access strip shall be maintained clear except for driveways, landscaping, fences or walls, which shall be subject to the same requirements specified for yards on adjoining properties fronting on the same parkway, highway or street. (Ord. 1497 Ch. 4 Art. 2 § 452.3, 1927.)

Where some lots or parcels of land in a block are improved or partially improved with buildings, each lot or parcel of land in said block may have a front yard of not less than the average depth of the front yards of the land adjoining on either side. A vacant lot or parcel of land, or a lot or parcel of land having more than the front yard required in the zone, shall be considered for this purpose as having a front yard of the required depth. (Ord. 1494 Ch. 4 Art. 2 § 452.4, 1927.)

The depth of a required front yard on key lots or parcels of land shall not be less than the average depth of the required front yard of the adjoining interior lot or parcel of land and the required side yard of the adjoining reversed corner lot or parcel of land. (Ord. 1494 Ch. 4 Art. 2 § 452.5, 1927.)

The required front yard of a lot or parcel of land need not exceed 50 percent of the depth required in a zone where the difference in elevation between the curb level and the natural ground at a point 50 feet from the highway line, measured midway between the side lot lines, is 10 feet or more; or, if there is no curb, where a slope exists of 20 percent or more from the highway line to a point on natural ground 50 feet from said highway line. Measurement in all cases shall be made from a point midway between the side lot lines. (Ord. 1494 Ch. 4 Art. 2 § 452.6, 1927.)

Where the front yard of a key lot adjoining a reversed corner lot is less than 10 feet in depth, such reversed corner lot may have a corner side yard of the same depth but not less than five feet. (Ord. 1494 Ch. 4 Art. 2 § 452.7, 1927.)

Where a lot or parcel of land is less than 50 feet in width, such lot or parcel of land may have interior side yards equal to 10 percent of the average width, but in no event less than three feet in width. (Ord. 1494 Ch. 4 Art. 2 § 452.8, 1927.)

Where a lot or parcel of land is less than 75 feet in depth, such lot or parcel of land may have a rear yard equal to 20 percent of the average depth, but in no event less than 10 feet in depth. (Ord. 1494 Ch. 4 Art. 2 § 452.81, 1927.)

A. A supplemental yard eight feet wide shall be established in all zones along and contiguous to the highway lines of limited secondary highways; any other yard requirements established in Chapters 22.20 through 22.40 of this title shall be in addition to this requirement.
B. A person shall not use any building or structure within this supplemental yard except for openwork railings or fences which do not exceed six feet in height and except as permitted within a yard by subsections A and D of Section 22.48.150.
C. The supplemental yard requirement established by this section may be modified only by the director of planning pursuant to Part 12 of Chapter 22.56 where topographic features, subdivision plans or other conditions create an unnecessary hardship or unreasonable regulation or make it obviously impractical to require compliance with this requirement. The director shall request a recommendation from the road commissioner prior to modifying the supplemental yard requirement contained in this section. A yard modification shall not be approved unless the written concurrence of the road commissioner has been received. (Ord. 85-0168 § 27, 1985.)

The following provisions are permitted in required yards subject to the provisions of this ordinance and of the county Building Code set out at Title 26 of this code. Projections specified are permitted only where also authorized by said Building Code.
A. Eaves and cantilevered roofs may project a maximum distance of two and one-half feet into any required yard, provided:
1. That such eaves or cantilevered roofs are not closer than two and one-half feet to any lot or highway line; and
2. That no portion of such eaves or cantilevered roofs are less than eight feet above grade: and
3. That there are no vertical supports or members within the required yard.
B. Fireplace structures, not wider than eight feet measured in the general direction of the wall of which it is a part, buttresses and wing walls may project a maximum distance of two and one-half feet into any required yard, provided:
1. That such structures are not closer than two and one-half feet to any lot or highway line; and
2. That such structures shall not be utilized to provide closets or otherwise increase usable floor area.
C. Uncovered porches, platforms, landings and decks, including access stairs thereto, exceeding an average height of one foot which do not extend above the level of the first floor may project a maximum distance of three feet into required interior side yards, and a maximum distance of five feet into required front, rear and corner side yards, provided:
1. That such porches, platforms, landings and decks shall not be closer than two feet to any lot or highway line; and
2. That such porches, platforms, landings and decks are open and unenclosed; provided, however, that an openwork railing not to exceed three and one-half feet in height may be installed.
D. Rain conductors, spouts, utility-service risers, shut-off valves, water tables, sills, capitals, bases, cornices and belt courses may project a maximum distance of one foot into any required yard.
E. Awnings or canopies may project a maximum distance of two and one-half feet into required interior side yard and five feet into required front, rear and corner side yard, provided:
1. That such awnings or canopies are not closer than two and one-half feet to any lot or highway line; and
2. That such awnings or canopies have no vertical support within such yard; and
3. That such awnings or canopies extend only over the windows or doors to be protected, and for not more than one foot on either side thereof.
F. Water heaters, water softeners and gas or electric meters, including service conduits and pipes, enclosed or in the open, may project a maximum distance of two and one-half feet into a required interior side or rear yard, provided that such structures or equipment are not closer than two and one-half feet to any lot line. Gas meters, if enclosed or adequately screened from view by a structure permitted in the yard, may project a maximum distance of two and one-half feet into a required front or corner side yard, provided that such equipment is not closer than two and one-half feet to any lot or highway line.
G. Stairways and balconies above the level of the first floor may project a maximum distance of two feet into a required interior or corner side yard, or four feet into a required front or rear yard, provided:
1. That such stairways and balconies shall not be closer than three feet to any lot or highway line; and
2. That such stairways and balconies are open and unenclosed; and
3. That such stairways and balconies are not covered by a roof or canopy except as otherwise provided by subsection E of this section.
H.1. Covered patios, attached to a dwelling unit, may project into a required rear yard, provided:
a. That such patio is not closer than five feet to any lot line; and
b. That not to exceed 50 percent of the required rear yard shall be covered by buildings or other roofed structures except as otherwise provided by subsection D of Section 22.48.140; and
c. That such patio shall remain permanently unenclosed on at least two sides. This provision, however, shall not preclude the placement of detachable screens.
2. A freestanding patio shall be subject to the same requirements as accessory buildings in rear yards as provided by Section 22.48.140.
I. Wall and window mounted air conditioners, coolers and fans may be used in any required yard, provided that such equipment is not closer than two and one-half feet to any lot line. (Ord. 1494 Ch. 4 Art. 2 § 452.9, 1927.)

A. Where more than one building is placed on a lot or parcel of land, the following minimum distances shall apply in any zone where front, side and rear yards are required by Title 22:
1. Distance Between Main Buildings. A minimum distance of 10 feet shall be required between all main residential buildings established on the same lot or parcel of land.
2. Distance Between Accessory and Main Buildings. Except where a greater distance is otherwise required by this Title 22, a minimum distance of six feet shall be required between any main residential building and an accessory building established on the same lot or parcel of land.
3. Projections Permitted Between Buildings on the Same Lot or Parcel of Land. The following projections are permitted within the required distance between buildings, provided they are developed subject to the same standards as and not closer to a line midway between such buildings than is permitted in relation to a side lot line within a required interior side yard:
a. Eaves and cantilevered roofs;
b. Fireplace structures, buttresses and wing walls;
c. Rain conductors and spouts, water tables, sills, capitals, cornices, and belt courses;
d. Awnings and canopies;
e. Water heaters, water softeners, gas or electric meters, including service conductors and pipes;
f. Stairways and balconies above the level of the first floor.
B. Uncovered porches, platforms, landings and decks, including access stairs thereto, which do not extend above the first floor are permitted within the required distance between buildings without distance restriction. (Ord. 1494 Ch. 4 Art. 2 § 452.10, 1927.)

The following accessory buildings are permitted in required yards as provided herein:
A. Garages or Carports Within Front Yards on Sloping Terrain. A one-story attached or detached garage or carport may be used within a required front yard on sloping terrain, provided:
1. That the difference in elevation between the curb level and the natural ground at a point 25 feet from the highway line is five feet or more; or where there is no curb, that a slope of 20 percent or more from the highway line to a point on natural ground 25 feet from said highway line exists. Measurement in all cases shall be made from a point midway between the side lot lines; and
2. That such garage or carport is located not closer than five feet to a highway line or closer to a side lot line than is permitted for a main building on such lot or parcel of land; and
3. That such garage or carport does not exceed a height of 15 feet above the level of the centerline of the adjoining street or highway.
B. Garages and Carports in Rear and Side Yards. One-story detached garages and carports may be used within a required interior side and rear yard, provided:
1. That such detached garages and carports are located 75 feet or more from the front lot line; and
2. That where such garages or carports have direct vehicular access to an alley, they shall be located a distance of not less than 26 feet from the opposite right-of-way line of such alley; and
3. That on a corner or reversed corner lot, such garage or carport is located not closer to the highway line than a distance equal to the corner side yard; and
4. That provision is made for all roof drainage to be taken care of on the same property; and
5. That not to exceed 50 percent of the required rear yard shall be covered by buildings or other roofed structures, except as otherwise provided by subsection D of this section.
C. Other Accessory Buildings in Rear Yards. Other one-story accessory buildings permitted in the zone, but excluding detached living quarters, living quarters for servants, or any other building designed or used for living or sleeping purposes, may be used within a required rear yard, provided:
1. That such buildings are not placed within a required side yard; and
2. That such buildings are placed not closer than five feet to any lot line; and
3. That not to exceed 50 percent of the required rear yard shall be covered by buildings or other roofed structures except as otherwise provided by subsection D of this section.
D. Replacement of Open Space. The director may approve buildings or other roofed structures covering in excess of 50 percent of a required rear yard where an equivalent area replacing that area used in excess of 50 percent is substituted elsewhere on the property, provided:
1. That the director determines that the equivalent area substituted is equally satisfactory with regard to usability and location; and
2. That such equivalent area does not exceed 10 percent in grade and has a minimum dimension of not less than 15 feet. Such dimension may include area contained in the required rear or side yard but required yards shall not be included in computing such equivalent replacement area; and
3. A site plan shall be submitted to the director pursuant to the provisions of Part 12 of Chapter 22.56. (Ord. 1494 Ch. 4 Art. 2 § 452.11, 1927.)

The following structures may be used in required yards subject to the requirements specified herein:
A. Planter boxes and masonry planters are permitted in all required yards not to exceed a height of three and one-half feet.
B. A swimming pool is permitted in a required rear yard provided it is not closer than five feet to any lot line.
C. Guard railings or fences for safety protection around depressed ramps may be placed in any yard, provided:
1. That an open-work railing or fence is used: and
2. That such railing or fence does not exceed a height of three and one-half feet.
D. Driveways, walkways, patio slabs and other areas constructed of concrete, asphalt or similar materials, and wooden decks, may be used in any required yard provided that such structures do not exceed one foot above ground level. This provision shall not exclude the use of steps providing access between areas of different elevation on the same property.
E. Ground-mounted air conditioners, swimming pool pumps, heaters, filters and fans may be used in required rear yards, provided:
1. That such structures or equipment are not closer than two and one-half feet to any lot line; and
2. That such structures or equipment do not exceed a height of six feet measured from the base of the unit.
F. Trash enclosures, movable dog houses and children’s play equipment may be used in a required rear yard.
G. Temporary signs advertising the sale, lease or hire of the premises on which the sign is located may be placed within the front or corner side yard if not less than 10 feet from the highway line. All said signs shall comply with the other provisions contained in this Title 22.
H. On-site signs permitted by this Title 22 and attached to a lawfully existing building may extend a maximum of 18 inches into the front or corner side yard. This does not authorize the projection of such signs beyond the right-of-way line established by the highway line.
I. Freestanding signs in Zones C-H and C-1 may be placed in the front yard subject to the other provisions of this Title 22. (Ord. 1494 Ch. 4 Art. 2 § 452.12, 1927.)

Fences and walls may be erected and maintained in required yards subject to the requirements specified herein:
A. Front Yards. Fences and walls within a required front yard shall not exceed a height of three and one-half feet.
B. Corner Side Yards. Fences and walls within a required corner side yard shall not exceed three and one-half feet in height where closer than five feet to the highway line, nor exceed six feet in height where five feet or more from said highway line.
C. Interior Side and Rear Yards. Fences and walls within a required interior side or rear yard shall not exceed six feet in height; provided, however, that on the street or highway side of a corner lot such fence or wall shall be subject to the same requirements as for a corner side yard.
D. Retaining Walls. Retaining walls not to exceed six feet in height are permitted in all yards.
E. Retaining Walls Topped with Walls or Fences.
1. Where a retaining wall protects a cut below the natural grade and is located on a front, side or rear lot line, such retaining wall may be topped by a fence or wall of the same height that would otherwise be permitted at the location if no retaining wall existed. Where such retaining wall contains a fill, the height of the retaining wall built to retain the fill shall be considered as contributing to the permissible height of a fence or wall; providing, however, that in any event an open-work non-view-obscuring fence of three and one-half feet may be erected at the top of the retaining wall for safety protection.
2. Where a wall or fence is located in the required yard adjacent to a retaining wall containing a fill, such wall or fence shall be set back from said retaining wall a distance of one foot for each one foot in height, to a maximum distance of five feet; provided, however, that this does not permit a wall or fence in required yards higher than permitted by this section. The area between such wall or fence and said retaining wall shall be landscaped and continuously maintained in good condition.
F. Fences and Walls Exempted. Where a fence or wall exceeding the heights specified is required by any law or regulation of the state of California, a fence or wall not exceeding such required height is permitted.
G. Measurement of Fence and Wall Height. The height of a fence or wall shall be measured at the highest average ground level within three feet of either side of said wall or fence. In order to allow for variation in topography, the height of a required fence or wall may vary an amount not to exceed six inches; provided, however, that in no event shall the average height of such fence or wall exceed the maximum height specified.
H. Notwithstanding the other provisions of this section, the director may permit fences or walls within any required yard on flag lots to a height not to exceed six feet, pursuant to the provisions of Part 12 of Chapter 22.56. (Ord. 1494 Ch. 4 Art. 2 § 452.13, 1927.)

Trees, shrubs, flowers and plants may be placed in any required yard, provided that all height restrictions applying to fences and walls shall also apply to hedges planted within yards and forming a barrier serving the same purpose as a fence or wall. (Ord. 1494 Ch. 4 Art. 2 § 452.14, 1927.)

The director of planning or the county engineer, without notice or hearing, may grant a modification to yard or setback regulations required by the ordinance codified in this Title 22 or any other ordinance where topographic features, subdivision plans or other conditions create an unnecessary hardship or unreasonable regulation or make it obviously impractical to require compliance with the yard requirements or setback line, except for the supplemental yards established contiguous to limited secondary highways which only may be modified in accordance with Section 22.48.115. The county engineer shall notify the director of planning of all modifications which the county engineer has granted. (Ord. 85-0168 § 28, 1985: Ord. 1494 Ch. 4 Art. 2 § 452.16, 1927.)

The commission, without notice of hearing, may grant a modification of yard and setback regulations for public sites unless such modification would be incompatible with adjoining development. (Ord. 1494 Ch. 4 Art. 2 § 452.15, 1927.)

In all zones, highway lines are hereby established parallel to the centerline of every parkway, alley, highway and street, as follows:
A. 40 feet from the centerline of every secondary highway, except as otherwise provided herein:
2. Downey Road--35 feet on the easterly side of the centerline, extending from Whittier Boulevard northerly to 3rd Street, as shown on C.S.B.-2866.
4. Hooper Avenue--increasing in width on the westerly side of the centerline from a minimum of 40 feet at a point 0.54 foot southerly of the centerline of 67th Street, the westerly boundary of said Hooper Avenue, extending southerly along the westerly boundary of Hooper Avenue (60 feet wide), as shown on map of Tract No. 5450, recorded in Book 59, Pages 94 and 95 of Maps, to a maximum of 50 feet at the centerline of 69th Street as shown on the map. (See map preceding.)

Increasing in width at a uniform rate on the easterly side of the centerline from a minimum of 40 feet at a point 0.54 foot southerly of the centerline of 67th Street, southerly to a maximum of 50 feet at the centerline of 69th Street; 50 feet on each side of the centerline extending from the centerline of 69th Street southerly to a point 133.59 feet southerly of the centerline of 75th Street; decreasing in width at a uniform rate from a maximum of 50 feet on each side of the centerline at a point 133.59 feet southerly of the centerline of 75th Street southerly to a minimum of 40 feet on each side of the centerline at a point 62.60 feet southerly of the centerline of 76th Street, as shown on C.S.B.-5140, sheets 1 and 2.
6. Pennsylvania Avenue--50 feet on the easterly side of the centerline, extending from the northeasterly boundary of the Route 210 (Foothill) Freeway northerly to Altura Avenue; decreasing in width on the easterly side of the centerline from a maximum of 50 feet at Altura Avenue extending northerly along a curve in the easterly boundary having a radius of 1,351.70 feet to a point 122 feet northerly of the northerly line of Altura Avenue (60 feet wide), and continuing northerly along said easterly boundary along a reverse curve having a radius of 1335.70 feet a distance of 119 feet, to a minimum of 40 feet, as shown on C.S.B.-5072, sheet 1, and on the map.
8. 223rd Street--50 feet on the northerly side of the centerline extending from Vermont Avenue westerly to a point 245 feet westerly of the centerline of Vermont Avenue; 50 feet on the southerly side of the centerline extending from Vermont Avenue westerly to a point 295 feet westerly of the centerline of Vermont Avenue; decreasing in width at a uniform rate on the southerly side of the centerline from a maximum of 50 feet at a point 295 feet westerly of the centerline of Vermont Avenue extending westerly to a minimum of 40 feet at a point 395 feet westerly of the centerline of Vermont Avenue; 42 feet on the northerly side of the centerline extending from Meyler Street westerly to Normandie Avenue, as shown on C.S.B.-793, sheet 1.
B. 50 feet from the centerline of every major highway, except as otherwise provided herein:
1. Arizona-Mednik Avenue--54 feet on each side of the centerline extending from Telegraph Road northerly to a point 277.49 feet northerly of the centerline of Verona Street; decreasing in width at a uniform rate from a maximum of 54 feet on each side of the centerline, extending from a point 277.49 feet northerly of the centerline of Verona Street northerly to a minimum of 50 feet on each side of the centerline at a point 456.61 feet northerly of the centerline of Verona Street; increasing in width at a uniform rate from a minimum of 50 feet on each side of the centerline extending from a point 201.28 feet northerly of the centerline of Whittier Boulevard northerly to a maximum of 54 feet on each side of the centerline at a point 400.44 feet northerly of the centerline of Whittier Boulevard; 54 feet on each side of the centerline extending from a point 400.44 feet northerly of the centerline of Whittier Boulevard northerly to the centerline of First Street, as shown on C.S.B.-2825, sheets 1 and 2.
2. Atlantic Boulevard--45 feet on each side of the centerline extending, from Whittier Boulevard northerly to the northeasterly boundary of Tract No. 7192 filed in Book 78, Page 38 of Maps, as shown on C.S.B.-8758.
3. Azusa Avenue--55 feet on each side of the centerline extending from Francisquito Avenue southerly to Colima Road, excluding all those portions within the cities of West Covina and Industry, as shown on C.S.B.-707, 2949 and 2628.

4. Bouquet Canyon Road--increasing in width at a uniform rate on the westerly side of the centerline from a minimum of 50 feet at a point 1,348.11 feet southerly of the centerline of Soledad Canyon Road northerly to a maximum of 60 feet at a point 827.81 feet southerly of the centerline of Soledad Canyon Road; increasing in width at a uniform rate on the easterly side of the centerline from a minimum of 50 feet at the intersection of the easterly boundary of Bouquet Canyon Road (50 feet from centerline) with the westerly boundary of the Southern Pacific Railroad right-of-way (100 feet wide), extending northerly to a maximum of 60 feet at the intersection of the easterly boundary of proposed Bouquet Canyon Road (60 feet from centerline) with said westerly boundary of the Southern Pacific Railroad right-of-way (100 feet wide); 60 feet on the easterly side of the centerline extending from a point 1,055 feet southerly of the centerline of Soledad Canyon Road northerly to a point 827.81 feet southerly of the centerline of Soledad Canyon Road; 60 feet on each side of the centerline extending from a point 827.81 feet southerly of the centerline of Soledad Canyon Road northerly and northeasterly to a point 165.60 feet southwesterly of the centerline of Alamogordo Road; decreasing in width at a uniform rate on the northwesterly side of the centerline from a maximum of 60 feet at a point 165.60 feet southwesterly of the centerline of Alamogordo Road northeasterly to a minimum of 54 feet at a point 597.55 feet northeasterly of the centerline of Alamogordo Road; 54 feet on the northwesterly side of the centerline extending from a point 597.55 feet northeasterly of the centerline of Alamogordo Road northeasterly to the northeasterly line of the Los Angeles City Aqueduct; 60 feet on the southeasterly side of the centerline extending from a point 165.60 feet southwesterly of the centerline of Alamogordo Road northeasterly to the northeasterly line of the Los Angeles City Aqueduct; 55 feet on each side of the centerline from the northeasterly line of the Los Angeles City Aqueduct northeasterly to a point on the centerline 706.30 feet northeasterly of the southerly line of Section 6, Township 4 North, Range 15 West, as shown on C.S.B.-2771 and C.S.B.-2998, sheets 2 and 3.
5. Civic Center Way--decreasing in width at a uniform rate on each side of the centerline from a maximum of 50 feet at the easterly terminus of the curve westerly of Trauts Road having a curve radius of 604.33 feet, to a minimum of 40 feet at a point 351.32 feet westerly thereof; 40 feet on each side of the centerline extending from a point 351.32 feet westerly of said easterly terminus westerly to the centerline of Vista Pacifica, as shown on C.S.B.-5022, sheets 2 and 3.
6. Colima Road--60 feet on the southerly and southeasterly side of the centerline extending from Azusa Avenue westerly and southwesterly to the northerly boundary of the city of Whittier; 60 feet on the northerly side of the centerline extending from Azusa Avenue westerly to the easterly boundary of Tract No. 27718, as shown on map recorded in Book 766, Pages 49 and 50 of Maps; 60 feet on the northwesterly side of the centerline extending from a point 186.92 feet northeasterly of the easterly boundary of Tract No. 27176, as shown on map recorded in Book 738, Pages 79 to 81 of Maps, southwesterly to said northerly boundary of the city of Whittier, as shown on C.S.B.-2626, sheets 1 and 2.
7. Del Amo Boulevard--54 feet on the northerly side of the centerline, extending from Wilmington Avenue easterly to Alameda Street, as shown on C.S.B.-617, sheet 4.
8. Diamond Bar Boulevard--60 feet on each side of the centerline, extending from a point 977.49 feet southwesterly of the centerline of Pathfinder Road northeasterly to a point 852 feet northeasterly of the centerline of Grand Avenue; 60 feet on each side of the centerline extending from a point 4,086.26 feet northerly of the centerline of Grand Avenue northerly to the southeasterly boundary of the Route 60 (Pomona) Freeway, as shown on F.M. 20106, sheets 1, 3 and 4.
10. Grand Avenue--55 feet on each side of the centerline, extending from the easterly boundary of the city of Industry southeasterly to the northwesterly boundary of the Route 60 (Pomona) Freeway, as shown on C.S.B.-2897.
11. Lake Avenue--40 feet on the easterly side of the centerline, extending from the northerly boundary of the city of Pasadena to Woodbury Road; 45 feet on each side of the centerline extending from Woodbury Road northerly to Altadena Drive, as shown on C.S.B.-2900.
12. Lakes Hughes Road--55 feet on each side of the centerline extending Castaic Road easterly to Ridge Route, as shown on C.S.B.-5001, sheet 1.
Mednik Avenue--described under Arizona-Mednik Avenue.
13. Paramount Boulevard--55 feet on each side of the centerline, extending from the northeasterly boundary of the city of Montebello northeasterly to San Gabriel Boulevard, as shown on C.S.B.-3068.
14. Pearblossom Highway--60 feet on each side of the centerline from Sierra Highway northerly and easterly to the centerline of Fort Tejon Road, as shown on C.S.B.-.5396, and C.S.B.-2859, Sheet 3.
15. Sierra Highway--increasing in width at a constant rate on each side of the centerline from a minimum centerline of the Angeles Forest Highway to a maximum of 60 feet northerly of the centerline of the Angeles Forest Highway, 60 feet on each side of the centerline extending from a point 640.00 feet northerly of the centerline of the Angeles Forest Highway northerly to the centerline of Pearblossom Highway as shown on C.S.B.-.5396, C.S.B.-.5505, and F.M. 120048, Sheets 2 and 3.
16. Slauson Avenue--47 feet on the southerly side of the centerline extending from Wilmington Avenue westerly to Central Avenue, as shown on C.S.B.-2930.
17. Soledad Canyon Road--60 feet on the northerly side of the centerline extending from Bouquet Canyon Road easterly to Sierra Highway; 60 feet on the southerly side of the centerline extending from Bouquet Canyon Road easterly to a point 143 feet westerly of the centerline of Vilna Avenue; 53 feet on each side of the centerline extending from Sierra Highway easterly to a point 431.13 feet easterly of the centerline of Sierra Highway; decreasing in width at a uniform rate from a maximum of 53 feet on each side of the centerline at a point 431.13 feet easterly of the centerline of Sierra Highway extending easterly to a minimum of 50 feet on each side of the centerline at a point 682.01 feet easterly of the centerline of Sierra Highway, as shown on C.S.B.-2874, sheets 1, 2 and 3, and F. M. 20254, sheet 5.
18. Valencia Boulevard--60 feet from centerline on both sides, from Bouquet Canyon Road westerly to a point 411.95 feet westerly of the centerline of Bouquet Canyon Road; decreasing in width at a uniform rate on the northerly side of the centerline, from a maximum of 60 feet at a point 411.95 feet westerly of the centerline of Bouquet Canyon Road, measured along the centerline, to a minimum of 51 feet at a point 375.46 feet westerly of said last-mentioned point, measured along the northerly right-of-way line; decreasing in width at a uniform rate on the southerly side of the centerline, from a maximum of 60 feet at a point 411.95 feet westerly of the centerline of Bouquet Canyon Road, measured along the centerline, to a minimum of 51 feet at a point 343.01 feet westerly of said last-mentioned point, measured along the southerly right-of-way line; 51 feet from centerline on both sides from said last-mentioned points to a point 448.62 feet northerly of the centerline of Magic Mountain Parkway; increasing in width at a uniform rate from a minimum of 51 feet each side of centerline at a point 448.62 feet northerly of the centerline of Magic Mountain Parkway to a maximum of 55 feet on each side of the centerline at a point 86.62 feet northerly of the centerline of Magic Mountain Parkway; 55 feet from centerline on the easterly and southerly side from a point 86.62 feet northerly of the centerline of Magic Mountain Parkway to a point 106.65 feet westerly of the centerline of Newhall Avenue; 55 feet from centerline on the westerly side from a point 86.62 feet northerly of the centerline of Magic Mountain Parkway; increasing in width at a uniform rate on the northwesterly side of the centerline from a minimum of 55 feet at Magic Mountain Parkway to a point 149.73 feet southerly of the centerline of Magic Mountain Parkway; increasing in width at a uniform rate on the northwesterly side of the centerline from a minimum of 55 feet at a point 149.73 feet southerly of the centerline of Magic Mountain Parkway to a maximum of 63.82 feet at a point 1,015.60 feet southerly and southwesterly of the centerline of Magic Mountain Parkway; decreasing in width at a uniform rate on the northerly side of the centerline from a maximum of 63.82 feet at a point 1,015.60 feet southerly and southwesterly of the centerline of Magic Mountain Parkway to a minimum of 55 feet at a point 1,881.48 feet southerly, southwesterly and westerly of the centerline of Magic Mountain Parkway; 55 feet from centerline on the northerly side from said last-mentioned point to a point 48.68 feet westerly of the centerline of Newhall Avenue; decreasing in width at a uniform rate on the northerly side of the centerline from a maximum of 55 feet at a point 48.68 feet westerly of the centerline of Newhall Avenue to a minimum of 51 feet at a point 434.26 feet westerly of the centerline of Newhall Avenue; decreasing in width at a uniform rate on the southerly side of the centerline from a maximum of 55 feet at a point 106.65 feet westerly of the centerline of Newhall Avenue to a minimum of 51 feet at a point 434.26 feet westerly of the centerline of Newhall Avenue; 51 feet from centerline on both sides from a point 434.26 feet westerly of the centerline of Newhall Avenue to a point 1,572.55 feet easterly of the centerline of the Route 5 (Golden State) Freeway on the northerly side of the centerline (measured along the centerline) and to a point 1,593.10 feet easterly of the centerline of Route 5 (Golden State) Freeway on the southerly side of the centerline (measured along the centerline); increasing in width at a uniform rate from a minimum of 51 feet each side of centerline at said last-mentioned points to a maximum of 55 feet at a point 1,096.17 feet easterly of the centerline of Route 5 (Golden State) Freeway; 55 feet from centerline on both sides from a point 1,096.17 feet easterly of the centerline of Route 5 (Golden State) Freeway westerly to Route 5 (Golden State) Freeway.
C.1. Parkways, minimum 40 feet from centerline, except as otherwise provided herein:
2. Grand Avenue--60 feet on the easterly side of the centerline extending from the northwesterly boundary of the city of Walnut northerly to the centerline of Golden Bough Drive; 55 feet on the easterly side of the centerline extending from the centerline of Golden Bough Drive northwesterly to the southerly boundary of the city of West Covina at a point approximately 78 feet southeasterly of the centerline of Virginia Avenue; 60 feet on the westerly side of the centerline extending from said northwesterly boundary of the city of Walnut northerly to the centerline of Cortez Street; 50 feet on the westerly side of the centerline extending from the centerline of Cortez Street northerly to the centerline of Sunset Hill Drive; 55 feet on the westerly side of the centerline extending from the centerline of Sunset Hill drive northerly to said southerly boundary of the city of West Covina, as shown on C.S.B. 5049, sheets 1 and 2.
3. Huntington Drive.
a. As used in this paragraph 3a, “centerline” means the centerline of the northerly roadway of Huntington Drive--44 feet on the northerly side of the centerline extending from the centerline of Michillinda Avenue westerly to the centerline of Rosemead Boulevard; 51 feet on the northerly side of the centerline extending from the centerline of Rosemead Boulevard westerly to the centerline of Lotus Avenue; 40 feet on the northerly side of the centerline extending from the centerline of Lotus Avenue westerly to a point 50 feet westerly of the centerline of Madre Street; decreasing in width at a uniform rate on the northerly side of the centerline from a maximum of 40 feet at a point 50 feet westerly of the centerline of Madre Street to a minimum of 20 feet at a point 350 feet westerly of the centerline of Madre Street; 20 feet on the northern side of the centerline extending from a point 350 feet westerly of the centerline of Madre Street westerly to a point 639.12 feet easterly of the centerline of El Campo Drive; 51 feet on the northerly side of the centerline extending from a point 639.12 feet easterly of the centerline of El Campo Drive westerly to the centerline of El Campo Drive; 20 feet on the northerly side of the centerline extending from the centerline of El Campo Drive westerly to the centerline of San Gabriel Boulevard, as shown on C.S.B.-2700.
4. Mulholland Parkway--50 feet on each side of the centerline extending from Pacific Coast Highway northerly and easterly to a point 5,847.20 feet westerly of the centerline of Las Virgenes Canyon Road; 60 feet on each side of the centerline extending from a point 5,847.20 feet westerly of the centerline of Las Virgenes Canyon Road easterly to a point 4,780.20 feet westerly of the centerline of Las Virgenes Canyon Road; 50 feet on each side of the centerline extending from a point 4,780.20 feet westerly of the centerline of Las Virgenes Canyon Road easterly and northerly to the southerly boundary of the city of Los Angeles, as shown on C.S.B.-8824, sheets 9, 11, 13, 14; C.S.B.-2836; F.M. 20265, sheets 2, 3, 4; C.S.B.2881; F.M. 11541, sheet 3; F.M. 20235, sheets 1, 2; and C.S.B. 2336, sheets 1, 2, 3, 4.
D. Alleys and streets, one-half the planned ultimate width, pursuant to the standards of Section 21.24.090 of Title 21 of this code, Subdivisions, unless in the opinion of the director, topographic features, subdivision plans, or other conditions create an unnecessary hardship or unreasonable regulation and he deems a lesser width adequate. The director shall designate the distance from the centerline in any case where such ultimate width is not specified.
E. Limited secondary highway, 32 feet from centerline; this may be increased to 40 feet for additional improvements where traffic or drainage conditions warrant. (Ord. 91-0128 § 1, 1991; Ord. 85-0168 §§ 29 and 30, 1985: Ord. 1494 Ch. 4 Art. 3 § 467, 1927.)

In all zones at the intersections of roads:
A. A person shall not use any building or structure within the area of the curve radii required at the intersections of roads by Section 21.24.110, except as permitted within a yard by subsection A of Section 22.48.120 and subsections A, D, H and I of Section 22.48.150, and provided that such structures do not constitute a visual obstruction between three and one-half feet and eight feet above the level of the ground.
B. Corner cutoffs, as required in Section 22.48.240 shall be provided as specified in Section 21.24.110 of Title 21 of this code, Subdivisions. (Ord. 85-0168 § 31, 1985: Ord. 1494 Ch. 4 Art. 3 § 468, 1927.)

This Part 4 does not apply to the following buildings or structures which, if they comply with all other provisions of this Title 22, may be used without complying with any provision of this Part 4:
-- Buildings or structures permitted in Zone R-2.
-- Outdoor advertising.
-- Accessory agricultural buildings where used primarily for agricultural purposes, including but not limited to: barns, silos, chicken houses, rabbit hutches and roadside stands.
-- Oil wells.
-- Electrical distribution and transmission substations.
-- Water storage tanks, reservoirs and water pumping plants, but excluding offices or maintenance yard facilities.
-- Gas measurement, distribution, and meter and control stations.
-- Telephone repeater stations.
-- Temporary carnivals and revival meetings.
-- Other similar uses which, in the opinion of the commission, will not generate a greater volume of traffic than the uses enumerated in this section. (Ord. 1494 Ch. 4 Art. 4 § 491, 1927.)

Except as otherwise provided in Sections 22.48.220 and 22.48.280, a building or structure shall not be used on any lot or parcel of land any portion of which abuts upon an alley, street or highway unless the one-half of the alley, street or highway which is located on the same side of the centerline as such lot or parcel of land has been dedicated and improved as provided in this Part 4. (Ord. 85-0168 § 33, 1986: Ord. 1469 Ch. 4 Art. 4 § 492, 1927.)

Except as otherwise provided in Section 22.48.280, a building or structure shall not be used on any lot or parcel of land, any portion of which is located within a Bridge or Major Thoroughfare District established pursuant to Section 21.32.200, unless the required district fee has been paid as a condition of issuing a building permit. (Ord. 85-0168 § 34, 1985.)

Alleys, streets and highways, shall be dedicated to the width from the centerline specified in Section 22.48.200, and including corner cutoffs specified in Section 21.24.110, except that dedication in any case shall not be required to such an extent as to reduce the area or width of any lot or parcel of land to less than that specified in Section 22.52.130 or 22.52.170. (Ord. 85-0168 § 35, 1986: Ord. 1494 Ch. 4 Art. 4 § 493, 1927.)

Before a structure subject to the provisions of this Part 4 may be used, curbs, gutters, sidewalks, base, pavement, street lights, street trees and drainage structures, where required, shall be constructed at the grade and at the location specified by the road commissioner unless there already exists within the present right-of-way, or on property the owner has agreed to dedicate, curbs, gutters, sidewalks, base, pavement, street lights, street trees, or drainage structures which are adequate, and the road commissioner so finds. Sidewalks shall be not less than four feet in width unless the available portion of the highway or street is less, in which case they shall be the width specified by the road commissioner. Curbs, gutters, drainage structures, base, pavement street lights, street trees, and sidewalks shall comply with the standards of the road commissioner. All construction within the existing or proposed road rights-of-way shall be done under provisions of Division 1 of Title 16 of this code, Highway Permits. (Ord. 85-0168 § 36, 1986: Ord. 1494 Ch. 4 Art. 4 § 494, 1927.)

In lieu of dedication, the road commissioner may accept an agreement to dedicate signed by all persons having any right, title, interest or lien in the property, or any portion thereof, to be dedicated. The signatures on such agreement shall be acknowledged, and the road commissioner shall record such agreement in the office of the county recorder of this county. (Ord. 1494 Ch. 4 Art. 4 § 495, 1927.)

A. In lieu of the required improvements, the road commissioner may accept from any responsible person a contract to make such improvements. Said improvements shall be completed within the time specified in the agreement to improve, except that the road commissioner may grant such additional time as he deems necessary if, in the opinion of said road commissioner, a good and sufficient reason exists for the delay.
B. Such contract shall be accompanied by a deposit with the board of supervisors of a sum of money or negotiable bonds or savings and loan certificates or shares in an amount which, in the opinion of the road commissioner, equals the cost thereof. If savings and loan certificates or shares are deposited, the owners thereof shall assign such certificates or shares to the county of Los Angeles, and such deposit and assignment shall be subject to all the provisions and conditions of Chapter 4.36 of this code.
C. If the estimated cost of the improvements equals or exceeds $1,000.00, in lieu of such deposit the applicant may file with the board of supervisors a corporate surety bond guaranteeing the adequate completion of all of the improvements, in a penal sum equal to such estimated cost.
D. Upon the failure of said responsible person to complete any improvement within the time specified in an agreement, the board of supervisors may, upon notice in writing of not less than 10 days served upon the person, firm or corporation signing such contract, or upon notice in writing of not less than 20 days served by registered mail addressed to the last known address of the person, firm or corporation signing such contract, determine that said improvement work or any part thereof is incomplete, and may cause to be forfeited to the county such portion of deposits or bonds given for the faithful performance of said work, or may cash any instrument of credit so deposited in such amount as may be necessary to complete the improvement work. (Ord. 1494 Ch. 4 Art. 4 § 496, 1927.)

This Part 4 does not apply to the use, alteration or enlargement of an existing building or structure or the erection of one or more buildings or structures accessory thereto, or both, on the same lot or parcel of land, if the total value of such alteration, enlargement, or construction does not exceed one-half of the current market value of all existing buildings or structures on such lot or parcel of land. (Ord. 1494 Ch. 4 Art. 4 § 497, 1927.)

A. The director of planning may grant a modification to the provisions of this Part 4 and relieve the applicant either from compliance with all or a portion of the provisions thereof if he finds:
1. Property adjoining on both sides of the subject property is developed with lawfully existing buildings or structures which, were they not already existing, would be subject to the provisions of this Part 4, and the requirement to dedicate, pave or improve would require a greater width than is the alley, street or highway abutting the existing buildings or structures on the adjoining properties; or
2. The lot or parcel of land adjoins an alley, street or highway for a distance of 100 feet or more, and only a portion of said lot or parcel of land is to be used for such building or structure or occupied by such use.
B. The road commissioner may grant a modification to the provisions of this Part 4 and relieve the applicant either from compliance with all or a portion of the provisions thereof if he finds:
1. There is in existence or under negotiation a contract between the county and a contractor to install the required improvements; or
2. The road commissioner is unable to furnish grades within a reasonable time; or
3. The required construction would create a drainage or traffic problem; or
4. The construction will be isolated from a continuous roadway which may not be improved for many years; or
5. There are in existence partial improvements satisfactory to the road commissioner, and he deems construction of additional improvements to be unnecessary or constitute an unreasonable hardship. (Ord. 85-0168 § 37, 1986: Ord. 1494 Ch. 4 Art. 4 § 498, 1927.)

Any person deeming himself aggrieved may apply for a variance from any provision of this Part 4, pursuant to Chapter 22.56, whether he has applied for a modification or not. The provisions of Section 22.48.290 shall constitute additional grounds for a variance from any provisions of this Part 4. (Ord. 1494 Ch. 4 Art. 4 § 499, 1927.)