Do I need a permit to build an ADU in Los Angeles?

California's state ADU laws override most local restrictions. Key LA-specific points:

1. Ministerial approval — California Government Code §65852.2 requires LA to approve a complete ADU application within 60 days. No public hearing. No design review (outside HPOZs). No CEQA analysis required for most ADUs.
2. Minimum state allowances — LA must permit at least one detached ADU up to 1,200 sqft plus one JADU (junior ADU within the primary dwelling, up to 500 sqft) on any single-family lot. LA's ADU ordinance can be more permissive but not more restrictive than state law.
3. No owner-occupancy requirement — California banned owner-occupancy requirements for ADUs permitted 2020-2025 and extended that ban through 2029 via AB 976. You can build and rent out both the primary home and the ADU.
4. Parking — LA cannot require replacement parking if the ADU is within 0.5 mile of transit or in an architecturally or historically significant district, which covers most of LA.
5. Setbacks — minimum 4-foot side and rear setbacks for detached ADUs.

The permit process (typical timeline):

• Submit drawings to LADBS via plan check (electronic submission via Online Development Services).
• First plan-check correction cycle: 10-30 business days.
• Respond to corrections; second cycle: 5-15 business days.
• Permit issued; construction begins.
• Rough inspections (foundation, framing, plumbing, electrical, mechanical, insulation).
• Final inspection + Certificate of Occupancy.

Typical LADBS ADU permit fees (2026):

• Building permit: $1,500-$4,500 depending on valuation
• Plan-check fee: $1,200-$3,500
• Plumbing + electrical + mechanical: $600-$1,200 combined
• School facilities impact fee: varies by LAUSD ($1-$6/sqft depending on district)

AskBaily's LA ADU scoping identifies the applicable state ADU path (detached, attached, JADU, SB 9 split) and estimates the total permit + soft cost.