How long does it take to build an ADU?

It depends on the design and your city's permit process. In your free evaluation, we give you a realistic estimate for your project.

Do I need permits for my ADU?

Yes, and we handle them for you, from the application through to approval.

Is RC Building licensed and insured?

Yes. We're a licensed, insured general contractor with active projects across LA County, San Diego, and the coastal cities.

What does the free evaluation include?

Someone from our team looks at your property, or the details you send us, and gives you a clear picture of the scope, the timeline, and a budget estimate. It's free, with no obligation.

Can you help me understand costs and financing?

Yes. We'll give you clear numbers upfront so nothing catches you off guard, and we'll point you toward options for funding the project.

Completed stucco ADU with white trim windows in a Los Angeles backyard

ADU specialists · Los Angeles & San Diego

Turn your backyard intorental income with a fully built ADU in Los Angeles.

We're a licensed, insured general contractor building ADUs across Los Angeles and San Diego, including the coastal cities. We handle the design, the permits, and the construction. You just approve the big decisions.

Licensed and insured · Lic. #1023300
Permits handled for you
Fixed pricing, quoted upfront
Serving LA and San Diego

The starting point

An ADU sounds great, until you actually start

You want more space. Maybe to rent out, maybe for aging parents, maybe a home office, or just to raise what your property is worth. But the moment you start looking into it, the same questions pile up:

01
How much does an ADU in Los Angeles actually cost?
02
Who deals with the city and the permits?
03
How do I know the contractor will finish on time and on budget?
04
What happens if I start the project and it stalls halfway?

The real risk

Most ADU projects don't fail because of the design. They fail because of the wrong contractor.

In LA and San Diego, ADU and remodeling work has filled up with unlicensed contractors, quotes that quietly "grow" mid-project, and permits that sit for months because nobody is really managing them.

The result is a stalled project, money already spent, and a half-built structure sitting in your backyard. And every month it isn't finished is another month of rent you're not collecting, or space your family needs and still doesn't have.

It's not that you're doing anything wrong. You just haven't found a team that knows how to move between design, permits, and construction without dumping all the coordination back on you.

Why RC Building

From your first idea to a finished ADU, without you running the job site

We handle the whole ADU process for you: design, permits, and construction. Your only job is to approve the big decisions. We deal with everything else.

Licensed and insured, so there's real accountability behind the work.

We handle the permits, so you never have to deal with the city yourself.

Fixed pricing, quoted upfront, so nothing balloons in the middle of the job.

One team from start to finish, with no subcontractors left unsupervised.

Real experience with ADUs, kitchen and bath remodels, and residential painting.

Serving LA County, San Diego, and the coastal cities.

Talk to our team. Your on-site evaluation is free, and there's no obligation.

Rental income

Your ADU can pay for itself

An ADU is more than extra square footage. In the LA and San Diego rental market, it can bring in monthly rent and add real value to your home. In your free evaluation, we'll go through what your specific property could realistically support, so you're deciding with actual numbers instead of guessing.