Los Angeles ADU permitting rules: what applies now

Reviewed September 26, 2026 against the March 2026 HCD ADU Handbook and current Government Code §§ 66310–66342. This guide addresses parcels within the City of Los Angeles, not unincorporated LA County or other cities. Confirm the property's permitting authority and applicable local standards before filing; a mailing address is not jurisdiction evidence. For the project phases beyond agency review, see the permit timeline.

By-right approval and the 60-day clock

Government Code § 66317 requires a written completeness determination within 15 business days after receipt; an incomplete determination must identify missing items. The permitting agency generally has 60 days after receiving a completed ADU application to approve or deny it, subject to statutory exceptions and an applicant-requested delay. This is an application decision clock, not a promise of construction completion, utility clearance or keys. For the City of LA, assemble the site-specific set using the official standard-plan checklist where that pathway applies; confirm the current intake requirements for other pathways.

Setbacks, height, and the four-foot rule

Government Code §§ 66314 and 66321 and the HCD handbook, Height Requirements and Setbacks distinguish pathways. For new attached or detached ADUs the local side and rear setback generally cannot exceed four feet; qualifying conversions or replacements can retain an existing footprint. Local height limits must allow at least 16 feet for detached ADUs, 18 feet on qualifying transit-proximate or multistory multifamily lots (with a further roof-pitch allowance in the applicable transit case), and for attached ADUs 25 feet or the primary dwelling's zoning height, whichever is lower. Verify the exact statutory pathway, transit measure, building code and any coastal requirements for the parcel.

• —Side and rear: local setback generally no more than four feet for a new attached or detached ADU; conversion and same-footprint replacement rules differ (§ 66314(d)(7)).
• —Front: an objective local setback may apply, but cannot prevent an otherwise qualifying ADU of at least 800 sq ft; § 66323 units are not subject to local development standards, including front setbacks (HCD handbook, Setbacks).
• —Lot coverage and floor-area-ratio limits cannot prevent an otherwise qualifying 800 sq ft ADU under § 66321(b)(3); this is not a blanket exemption for every design.

Owner-occupancy and the AB 1033 condo path

AB 976 removed the 2025 sunset: under Government Code § 66315 a local agency generally cannot impose owner-occupancy on an ADU. The narrow qualified-buyer separate-sale pathway in § 66341(c)(3) is different. A JADU follows § 66333(b): owner-occupancy applies when sanitation is shared with the primary home, with statutory ownership exceptions; it does not apply when sanitation is independent. AB 1033 permits a local ordinance for separate condominium sale but does not itself authorize sales on every parcel. The City of LA council file 25-0753 records a September 2025 council action on a motion, not an enacted effective opt-in ordinance; no effective City of LA ordinance was established in this September 26, 2026 review. Unincorporated LA County and each other city require their own ordinance verification. Do not rely on the motion to market a separately saleable unit.

Fees, school district levies, and the 750 sq ft line

Government Code § 66311.5 distinguishes several fee categories. A local agency, special district, or water corporation may not impose the impact fees identified by the statute on an ADU with 750 sq ft or less of interior livable space, or a JADU with 500 sq ft or less; impact fees for a larger ADU must be proportionate to the primary dwelling's square footage. Separately, an ADU or JADU under 500 sq ft is treated as not increasing assessable space by 500 sq ft for the school-facility fee authorized by Education Code § 17620. Building permit and plan-check fees are not made universally free by these rules, and connection or capacity charges are a separate statutory category. Confirm the current agencies and fee schedules for the property.

The application packet that actually clears intake

1. 01Site plan to scale, with all setbacks dimensioned and existing structures shown.
2. 02Floor plans and elevations with the professional documentation required for the actual scope and local pathway.
3. 03Applicable Title 24 energy compliance documentation coordinated with the drawings; confirm the current required forms and responsible signatory.
4. 04Structural and geotechnical information when the mapped hazards, foundation, grading or reviewing authority's written requirements call for it; no universal 20% slope trigger is established here. See hillside soils.
5. 05Utility and sewer or septic records as required for the actual parcel and submission path; see the utility connection guide.