What might an ADU cost in Los Angeles?
There's no honest single number. Cost depends on the property and the project. Here's what drives it.
- 01
Size & layout
More square footage and more bathrooms or kitchens raise cost, though cost per square foot often falls as size grows.
- 02
ADU type
Garage conversions can reuse structure; detached units need a full foundation, framing, and roof.
- 03
Site conditions
Slope, soils, access for equipment, demolition, and tree protection all affect scope.
- 04
Utilities
Distance to sewer, water, and electrical connections — and whether panels need upgrading — can be significant.
- 05
Design & engineering
Architectural drawings, structural engineering, Title 24 energy compliance, and surveys.
- 06
Permits & fees
Plan-check, permit, and any applicable impact or school fees set by the jurisdiction.
- 07
Finishes
Cabinetry, flooring, fixtures, windows, and exterior materials.
Educational estimate only — not a quote, bid, or proposal. Actual cost depends on site conditions, utilities, design, engineering, permit fees, and scope, and is determined only after a property assessment and written proposal.
Get a clearer picture for your property.
Share your address and goals. An ADU specialist will review the details and contact you to discuss what may make sense.