How Much Does an ADU Cost in Los Angeles?
Carlos Moreno, Assoc. AIA
Founder, KĒĒP
Published August 24, 2026 · Updated August 24, 2026 · 6 min read
The short answer
KĒĒP ADUs in Los Angeles start at $190,000 all-in for a studio, rising with size to $260,000 for a one-to-two bedroom and $350,000 for a two-bedroom-plus — each including design, permits, materials, and construction. These are starting prices; your fixed all-in number is confirmed in writing after a free feasibility and site assessment.
What "all-in" actually means
The number that matters is the all-in price — the one that includes everything it takes to hand you a finished, permitted home. That means design, city permits, materials, construction labor, and site work. Many quotes look lower because they leave pieces out, then add them back as the project moves.
Size is what moves the total: a compact studio starts at $190,000, while a full two-bedroom-plus starts at $350,000. That's why a real number comes from your lot, not a brochure — the feasibility assessment reads what actually fits and confirms your fixed price before you commit to anything.
Find out what an ADU would cost on your property.
Get a free feasibility reportWhat changes the number on your lot
Two lots on the same street can price differently. The main drivers:
| Factor | Effect on cost |
|---|---|
| Unit size | The single biggest driver — you pay by the square foot |
| Site access | Tight access for equipment and deliveries adds labor |
| Utility distance | Long runs to sewer, water, and power add trenching cost |
| Slope | Hillside and graded lots need more foundation work |
| Finishes | Upgraded kitchens, baths, and flooring add up |
| City | Some cities permit faster and cheaper than others |
This is exactly what a feasibility assessment is for: it reads your specific lot and returns a real range before you commit to anything. Your fixed all-in price is then confirmed in writing after the site assessment — with concealed conditions handled openly rather than as surprise change orders.
Common questions
KĒĒP ADUs in Los Angeles start at $190,000 all-in for a studio, $260,000 for a one-to-two bedroom, and $350,000 for a two-bedroom-plus — each including design, permits, materials, and construction. Your fixed price is confirmed after a free feasibility and site assessment.