ADU cost · Los Angeles
ADU cost in
Los Angeles.
We've built 600+ ADUs across Greater Los Angeles. Below are realistic all-in LA price ranges (construction + soft costs + contingency) by ADU type, plus a free calculator to model your exact lot.
Open the full cost calculator →All-in ranges by type
What an ADU costs in Los Angeles.
Typical all-in price per square foot by ADU type (construction + soft costs + contingency). Multiply by your size for a ballpark, then refine with the calculator.
Garage conversion
$250–$400
per sq ft, all-in
fastest, most affordable
Internal ADU
$260–$420
per sq ft, all-in
within the existing home
Attached ADU
$300–$500
per sq ft, all-in
added to the house
Detached ADU
$330–$560
per sq ft, all-in
standalone, best resale
Model it in 60 seconds
Get your exact range.
Our free interactive calculator models hard cost, soft cost, and contingency across every ADU type, size, and finish level — a real range, not a press-release number.
Open the ADU cost calculator →Questions
ADU cost in Los Angeles — your questions.
Still have a question? Ask us during your free consultation.
How much does an ADU cost in Los Angeles?
Most LA ADUs run roughly $250–$560 per square foot all-in. Garage conversions are the lowest-cost path; detached new-builds with upgraded finishes are the highest. A typical 600–900 sqft build lands in the middle. Use the calculator below for your range.
What drives ADU cost up in LA?
Sloped or tight lots, long utility runs, panel/service upgrades, luxury finishes, and difficult access. Flat, accessible lots with a nearby panel and standard finishes keep costs down.
Is a garage conversion really cheaper?
Usually yes — you reuse an existing structure and foundation, and LA doesn't require replacing the parking. It's the fastest-permitting, most affordable ADU path. See our garage conversion cost page.
Does the estimate include permits and soft costs?
The high end of our range includes soft costs (architecture, engineering, permits, utility taps) and an ~8% contingency. Hard cost alone is about 20% lower.
Free consultation
Get a firm number for your lot.
Calculators get you close. For a real all-in price, tell us about your property and we'll put together a precise estimate — no obligation.
