ADU guides · Updated October 2026

ADU guides for Los Angeles homeowners.

Straight answers to the questions people ask before they build. Each guide opens with a short answer, then the detail and the "it depends" cases. Rules and figures are dated so you know how current they are.

What does an ADU cost and earn?

How much does an ADU cost in Los Angeles?Published cost ranges by ADU type, the costs on top of construction, and why quotes differ.Read the guide How much rent can an ADU make in Los Angeles?Current Los Angeles rents by unit size, what sets an ADU's rent, and the rental rules.Read the guide

What are the rules?

What are the California ADU rules in 2026?Size, setbacks, height, parking, owner occupancy, impact fees, JADUs and separate sale.Read the guide Do I need a permit to build an ADU in California?Who issues permits, the state review deadlines, and legalizing an existing unit.Read the guide

How do I plan my project?

Garage conversion or new ADU: which is right for you?Cost, size, setbacks and the garage conditions that decide it.Read the guide How long does it take to build an ADU?The phases, real permit times and what slows projects down.Read the guide

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