Parking Requirements

Parking Requirements in the LA City zoning code are layered: a base R-zone requirement at §12.21 A.4(a), a parallel hillside framework at §12.21 C.10(g) for R1, RS, RE, RA lots in designated Hillside Areas, separate provisions at §12.21 A.17 for A1, A2, and RD zones in Hillside Areas, and an ADU exemption matrix at §12.22 A.33(c)(12) and California Government Code §66322. Which set governs depends on the zone, the Hillside Area designation, the street classification at the frontage, and — for ADU projects — eligibility for the parking exemption. The same project can be reviewed against multiple parking sections at once.

LAMC §12.21 A.4(a) for the base R-zone requirement (two automobile parking spaces on the same lot with each one-family dwelling, in a private garage in RA, RE, RS, R1, RU, RZ, RMP, and RW Zones). LAMC §12.21 A.5 for parking design standards including back-up aisles, stall dimensions, and driveway slopes. LAMC §12.21 A.6 for location of required parking spaces. LAMC §12.21 C.10(g) for hillside R-zone parking, including (g)(1) two covered spaces in a private garage, the (g)(1)(i) exception for narrow nonconforming lots not abutting an alley, and (g)(2) the additional-space rule on Substandard Hillside Limited Street lots where combined Residential Floor Area exceeds 2,400 square feet — one additional space per 1,000 square feet of additional RFA, up to a maximum of five total on-site spaces. LAMC §12.21 C.10(g)(3) for parking-stall dimensions (standard 8’6” x 18’, compact 7’6” x 15’). LAMC §12.21 A.17 for the parallel hillside parking framework on A1, A2, and RD zone lots. LAMC §12.22 A.33(c)(12) for ADU parking and the exemption conditions. California Government Code §66322 for the state-law ADU parking exemptions.

A correction that the project does not provide the required number of parking spaces; that the back-up aisle is too short or improperly configured; that the driveway slope exceeds the maximum; that an ADU project has claimed the parking exemption without documenting the exemption condition (transit proximity, HPOZ location, conversion of existing space, etc.); or that a hillside lot fronting a Substandard Hillside Limited Street with combined RFA above 2,400 square feet has not provided the additional spaces required under §12.21 C.10(g)(2). Each of these is a separate correction and may appear on different correction sheets simultaneously — the SFR sheet, the BHO supplemental, and the ADU sheet can all cite parking on the same project.

Treating the ADU parking exemption as automatic. The exemption matrix at §12.22 A.33(c)(12) applies under several specific conditions (within a half-mile of public transit, within a Historic Preservation Overlay Zone, when the ADU is fully contained within the existing primary residence, and others), and each condition has its own evidentiary requirement. Submitting an ADU project as “parking exempt” without identifying which exemption condition applies typically produces a correction that requests documentation. The exemption pattern has changed substantially over recent legislative cycles, and prior designers’ assumptions about which conditions qualify may be out of date. A second pattern is forgetting that on a Substandard Hillside Limited Street lot, the (g)(2) additional-space rule is independent of any ADU exemption — it applies to the main dwelling’s combined floor area, regardless of ADU parking treatment.

Parking requirements typically constrain site planning more than owners expect. On a hillside R1 lot fronting a Substandard Hillside Limited Street, a project at 3,400 square feet RFA may need three covered spaces rather than two, and the additional space has to fit on the lot — often pushing the building further up the slope or requiring tandem or mechanical-lift configurations that have their own dimensional rules. ADU projects that qualify for parking exemption need to demonstrate that qualification on the plan-set cover sheet, not assume it will be granted. Tandem parking, mechanical-lift parking, and uncovered parking each have separate provisions that can be combined in specific configurations. The Zoning Administrator may reduce the (g)(2) additional-space requirement under §12.24 X.28, but this is a discretionary action and is not by-right.

Substandard Hillside Limited Street (because the SHLS classification triggers the §12.21 C.10(g)(2) additional-parking rule), ADU Pathway Selection (because pathway selection determines parking exemption eligibility), Residential Floor Area (because combined RFA drives the SHLS additional-space threshold at 2,400 square feet), and Slope Band Analysis (because the slope-derived RFA cap interacts with the parking calculation for hillside lots).

Verification: §12.21 A.4(a) base parking requirement (two automobile parking spaces with each one-family dwelling, private garage in RA/RE/RS/R1/RU/RZ/RMP/RW Zones) confirmed at LAMC line 11342. §12.21 C.10(g) hillside R-zone parking framework confirmed at LAMC line 15967 area. §12.21 C.10(g)(1) two-covered-space private-garage rule confirmed at LAMC line 15971, including the (g)(1)(i) narrow-lot exception (40 feet or less width, not abutting an alley, not on a Substandard Hillside Limited Street). §12.21 C.10(g)(2) Substandard Hillside Limited Street additional-space rule (one additional space per 1,000 sf of RFA above 2,400 sf, max five total on-site spaces, additional spaces may be located in the required Front Yard) confirmed verbatim at LAMC line 15979. §12.21 C.10(g)(2)(i) Zoning Administrator reduction authority confirmed at LAMC line 15986 area. §12.21 C.10(g)(3) parking-stall dimensions confirmed at LAMC line 15990 area. §12.22 A.33(c)(12) ADU parking exemption matrix confirmed at LAMC line 18465. Earlier drafts of related material attributed the hillside additional-space rule to §12.21 A.17; the corrected attribution is in §12.21 C.10(g)(2). §12.21 A.17 is the parallel hillside framework for A1, A2, and RD zones, distinct from the BHO parking rule for R1/RS/RE/RA hillside lots. California Government Code §66322 for ADU state-law exemptions is referenced by name; the LAMC source as loaded references the older Government Code numbering at LAMC line 18349, and the 2024 statutory renumbering post-dates the loaded text and was not directly loaded for this draft.