ADU Cost Estimate · Free · 48-hour turnaround

A real number
for your lot.

No generic ranges from the internet. We use your actual property — lot size, zoning, setbacks, slope — to give you a cost you can plan against.

48h

Turnaround

Cost

All 5

ADU types

Ballpark ranges

What ADUs typically cost in Los Angeles.

These follow our ADU cost calculator: size times our flat construction rate for the finish level. They're useful for planning, but your property-specific estimate also accounts for your lot and site conditions.

ADU type	Low	High	Notes
Garage conversion	$56K	$137K	1- or 2-car garage (240–480 sq ft) at $235–$285/sq ft. Reuses the existing structure.
Attached ADU	$83K	$390K	300–1,200 sq ft at $275–$325/sq ft. Shares a wall with your home.
Detached ADU	$83K	$390K	300–1,200 sq ft at $275–$325/sq ft. Standalone, most privacy.

Construction estimates at our flat rates. Site-specific items such as grading, utility upgrades or work on existing structures are confirmed in your estimate. Internal conversions and multi-family ADUs are quoted individually.

Cost factors

What moves the number.

Size & layout: Every square foot is priced at the same flat rate, so a 500 sq ft studio costs well under half of a 1,200 sq ft 3-bedroom.
Site conditions: Slope, soil type, setback constraints, utility runs, tree removal — all affect site-prep cost before construction starts.
Finish level: Finish level sets your rate: $275, $300 or $325 per sq ft ($235–$285 for garage conversions).
Permits & fees: LA plan-check fees, utility-connection fees, impact fees. We include these as a line item so nothing is hidden.

No surprises

“Their estimate came in at $285K. Final invoice was $287K. Two grand over on a nine-month project is honestly the cleanest I've ever seen a contractor run a budget.”

Jennifer K. · Glendale, CA · Detached ADU, 820 sq ft

Questions

Estimate FAQ

Still have a question? Ask us during your free consultation.

Why don't you just post a price list?

Because every lot and every homeowner's goals are different. A $120K garage conversion and a $350K detached ADU can both be 'right' answers depending on your property and what you want the ADU for. We'd rather tell you the real number for your specific situation.

What does the estimate include?

Design, permits, construction, major finishes, and standard fees. We break it down line by line so you can see exactly what's in and what's not. No surprise fees mid-project.

How long until I get an estimate after filling this out?

Within 48 hours. We review your property via satellite + public records, talk with you briefly, and send a written range with assumptions clearly listed.

Is my estimate locked in?

The initial estimate is a good-faith range based on preliminary info. Once we do a site visit and formal scope, we give you a firm proposal you can hold us to.