State detached ADU path
The Los Angeles state path preserves a detached ADU option with a 150 sq ft minimum, up to 800 sq ft, 4 ft side and rear yards, and height allowances that vary around transit and roof pitch.
California ADU rules · popularity rank #1
Los Angeles ADU Rules & Requirements
Los Angeles ADU rules include state-law paths and local administration through ZA Memo No. 143. The city supports detached, attached, conversion, garage conversion, and JADU paths, with parcel-specific limits still controlled by zoning, overlays, and plan check.
Based on 8 curated rule paths from official sources. Last reviewed June 2026.
Quick facts
- Popularity rank
- #1 California ADU market
- Rule paths
- 8 curated ADU rule sets
- Detached ADU floor
- Up to 800 sq ft state path
- Side / rear setbacks
- 4 ft state baseline
- Height
- 16-20 ft state path
- Primary source
- LA City Planning ZA Memo
Multiple ADU types are covered
The curated data includes detached, attached, conversion, garage conversion, and JADU rule paths so homeowners can compare the common project types before running a parcel check.
Parcel context still matters
Los Angeles lots can be affected by community plans, slope, fire, coastal, and other overlays. The city page summarizes official rules; the property check resolves the lot-specific starting point.
Check these rules against your lot
City rules explain the ceiling. Your parcel determines the practical answer: zoning, lot size, APN, setbacks, overlays, and buildable area.
Check my propertyTop California ADU city rules
Los Angeles ADU FAQ
No. These pages summarize official city and state rule sources for planning research. Permit approval still depends on parcel geometry, zoning details, overlays, easements, fire access, utilities, and plan-check review.
California ADU law creates statewide minimum paths, while cities keep local standards for many project types. Showing both paths keeps the homeowner from treating a single city rule as the whole answer.
Run an address-specific feasibility check. The report combines official city rules with deterministic GIS and parcel data so the next question becomes what fits on your actual lot.
Source notes
Summaries reflect the official source listed below and the structured ADU rule data collected for HomeFeasible's first launch. Regulations change and individual parcels vary; verify current requirements with the city planning department or run a parcel-specific check before making decisions.
ZA Memorandum No. 143 - Accessory Dwelling UnitsCanonical URL: https://homefeasible.com/city/los-angeles/adu