County context

Los Angeles County Pre-Approved ADU Plans

Browse official city and county pre-approved ADU plan programs in Los Angeles County, California.

Source-backed county plan listings

Program Overview

This Los Angeles County page summarizes source-backed county context for Los Angeles County, California. The current export lists 2 city program pages in this county and 3 county-level accepted-plan records. County-level plan sources include Los Angeles County Department of Regional Planning, Los Angeles County Public Works Building and Safety, and Los Angeles County Department of Regional Planning / Public Works. Provider names include Los Angeles County.

County records may apply only in unincorporated areas or county-administered jurisdictions, so verify the official source before relying on a plan for an incorporated city. County fee and permit data includes 2 fee records and 10 permit requirement records. Missing source fields remain Not listed in source, and directory records do not guarantee permit approval.

Summary

Location
Los Angeles County, California, USA
County-level accepted plans
3 accepted plans
Providers
1 provider
Origin programs
1 program
Plan size range
800 to 1,200 sq ft
Permit sources
9 sources

Included Locations

County-Level Accepted Plans

3 plans

Permit Requirements

10 requirements

All

Multifamily ADU unit count

Government PDF

On multifamily lots, attached ADUs may equal up to 25 percent of principal multifamily units and detached ADUs may total up to eight per lot, provided they do not exceed the number of principal units.

Last checked
May 1, 2026
Notes
Not listed in source

All

Parking

Government PDF

No replacement parking is required when parking is removed for an ADU; no parking is required outside very high fire hazard severity zones, while one uncovered space may be required in such zones unless exempt.

Last checked
May 1, 2026
Notes
Not listed in source

All

Ministerial review timing

Government PDF

The County states it must approve or deny complete ADU/JADU applications within 60 days, unless extended by mutual agreement or submitted with a new primary dwelling.

Last checked
May 1, 2026
Notes
Not listed in source

Detached

Standard plan site limitations

Government PDF

PDF limitations state the standard plan does not apply to hillside properties, very high fire hazard severity zones, geologic hazard zones, methane gas hazard zones, flood hazard zones, restricted use areas, septic tank areas, or enforcement cases.

Last checked
May 1, 2026
Notes
Not listed in source

Fees

2 fee records

Official Sources

9 sources