Can I Build ADU in Los Angeles, CA? (2026)
Find out if you can build a adu in Los Angeles, CA. Rules, permit requirements, costs, and next steps.
Yes, ADUs are allowed in Los Angeles, CA. California state law ensures by-right approval.
An Accessory Dwelling Unit (ADU) is a secondary housing unit on a residential lot — also called a granny flat, in-law suite, or backyard cottage. In Los Angeles, CA, ADUs are permitted by right under state law, making them one of the most accessible ways to add housing on your property. ADUs can be detached, attached to the main home, or created by converting an existing garage or accessory structure.
ADU Rules in Los Angeles
ADU Rules in Los Angeles: Detached ADU max size: 1200 sq ft. Attached ADU max size: 50% of primary dwelling up to 1200 sqft. Junior ADU (JADU): up to 500 sq ft, within existing structure. Setbacks: 4 ft side, 4 ft rear. Owner-occupancy: No additional standards, other than those provided in Section 66314, shall be used or imposed, including an owner-occupant requirement, except that a local agency may require that the property may be used for rentals of terms 30 days or longer.. State preemption applies: CA law requires Los Angeles to approve compliant ADUs by right.
Costs & Fees
ADU permits in Los Angeles: Total estimated permit cost: $2,000–$8,000 total permit fees depending on size and valuation. Contact the LA Department of Building and Safety (LADBS) for current fee schedule.
Timeline
The permitting agency shall either approve or deny the application to create or serve an accessory dwelling unit within 60 days from the date the permitting agency receives a completed application if there is an existing single-family or multifamily dwelling on the lot. Note: LADBS ADU Express service targets 2-4 weeks for plan check; construction typically 4-12 months (operational, not codified).
Next Steps
Next steps for building an ADU in Los Angeles: 1. Review full ADU rules including size limits, setbacks, and parking. 2. Apply for an ADU permit through the LA Department of Building and Safety (LADBS) at https://www.ladbsservices2.lacity.org/. 3. Hire a licensed contractor familiar with CA ADU requirements.
LA Department of Building and Safety (LADBS)
Phone: (213) 482-0000
Website: https://www.ladbs.org/
Online Permits: https://www.ladbsservices2.lacity.org/
Frequently Asked Questions
Can I build an ADU in my backyard in Los Angeles?
Yes. California state law requires LA to permit ADUs by-right on all residential lots. You can build a detached ADU up to 1,200 sqft in your backyard, plus a Junior ADU (JADU) up to 500 sqft within your existing home. No owner-occupancy requirement applies. Permits are processed ministerially (no discretionary review) within 60 days.
What is the difference between an ADU and a JADU in Los Angeles?
An ADU (Accessory Dwelling Unit) is a fully independent unit with its own kitchen, bathroom, and entrance — it can be detached or attached to the main home, up to 1,200 sqft. A JADU (Junior ADU) must be within the existing footprint of the single-family home or garage, is limited to 500 sqft, must share the property owner's address, and requires only an efficiency kitchen (can share a bathroom with main home).
Do I need a permit to run a business from my home in Los Angeles?
Yes. A Home Occupation Permit ($163 fee) is required for any business operated from a residence. Restrictions apply: no customers on-site, no employees who aren't residents, no exterior signs, and business use must be incidental to residential use. Violations can result in $250–$1,000 fines per day.
Can I do short-term rentals (Airbnb) in Los Angeles?
Yes, with restrictions. You must register with the city ($89/year) and the property must be your primary residence. Whole-home rentals are limited to 120 nights per year (an Extended Home Sharing Permit allows unlimited nights with additional requirements). Rent-stabilized (RSO) units and ADUs where the owner doesn't reside on-site cannot be short-term rented. Violations carry fines up to $2,500 per day.
What is the front yard setback in an R1 zone in Los Angeles?
The standard front yard setback in an R1 zone is 20 feet from the front property line. However, if the average front setback of structures on the same block face is greater than 20 feet, your setback may need to match the block average. Fences over 3.5 feet also require permits in front yards. Always verify with ZIMAS (zimas.lacity.org) for your specific parcel.
Are solar panels required on new homes in Los Angeles?
Yes. California's Title 24 Energy Code (effective January 1, 2020 for single-family, updated 2023) requires solar photovoltaic systems on all new low-rise residential construction. Battery storage requirements also apply to many new builds under the 2023 standards. New homes in LA must comply with these state requirements.
How do I find the zoning for my property in Los Angeles?
Use ZIMAS (Zoning Information and Map Access System) at zimas.lacity.org. Enter your address to find your parcel's zone code, community plan designation, overlay zones, and other land use information. ZIMAS is the official LA City resource and is regularly updated.
Source: LA Department of Building and Safety (LADBS) — Building Regulations. Last verified April 7, 2026. View source