How much does it cost to build an ADU in Los Angeles?
ADU costs in LA range from $80,000 to $350,000+ depending on type and finish level. Garage conversions start around $80,000–$130,000. New detached ADUs typically run $150,000–$300,000+. Use our free calculator for a personalized estimate based on your specific project.
What is the setback requirement for an ADU in Los Angeles?
Under California ADU law (Gov. Code 65852.2), ADUs require only 4 ft side and rear setbacks regardless of local zoning — not the 25 ft setbacks that apply to primary dwellings. This applies to all ADU types including detached ADUs and garage conversions.
Do I need a permit to build an ADU in Los Angeles?
Yes — all ADUs require permits from LADBS. However, California state law has made ADU permitting streamlined: most are approved ministerially (by-right) without public hearings or discretionary review. ADU Masterminds handles the entire permitting process for you.
How long does it take to build an ADU in Los Angeles?
Typically 12–18 months total: 2–3 months for design and plans, 3–6 months for LADBS permit approval, and 4–9 months for construction. Garage conversions move faster and can be completed in 8–12 months. We provide a locked schedule before breaking ground.
Can I rent out my ADU in Los Angeles?
Yes. California eliminated owner-occupancy requirements for ADUs in 2020. In the San Fernando Valley, ADUs typically rent for $1,400–$1,700/month (studio), $1,750–$2,200/month (1BR), and $2,200–$2,800/month (2BR). Most clients offset 60–100% of their mortgage payment.
What is a garage conversion ADU?
A garage conversion transforms your existing attached or detached garage into a permitted living unit. It's the most popular ADU type in LA — lower cost, faster to build, and streamlined under state law. A typical 2-car garage (400–500 SF) costs $80,000–$130,000 and rents for $1,500–$1,800/month.
What is a Junior ADU (JADU)?
A JADU is carved from within your existing home — up to 500 SF — and is allowed by-right under California state law on any single-family lot. It requires an efficiency kitchen but can share a bathroom with the main house. JADUs are the lowest-cost ADU option, typically $40,000–$80,000.
Does the ADU cost include an electrical panel upgrade?
Panel upgrades are separate from the base ADU cost. Most LA homes built before 1990 have 100–150 amp service. An ADU with kitchen and laundry typically needs a 200 amp panel upgrade or sub-panel. Budget $6,500–$10,000 for panel work — we confirm your current capacity before permitting.