Southern Cali's ADU Experts

A1 Builders, Inc. designs and builds ADU’s, granny flats, in-law suites – converting garages or creating brand new, free-standing dwellings – to add extra space, income potential, and value to sell. As California restrictions to add additional structures and convert existing has become more lenient over the past few years, the rise of the ADU has been a logical and lucrative one for those interested in going through the motions. At A1 Builders, Inc., we do it all for you, from finance to construction, eliminating the headache and stress that typically come with such an endeavor. Let one of our Project Specialists walk you through the super streamlined and stress-free process today!

What's an ADU

ADUs are dwellings with a separate living area and entrance that are either attached or detached from the main house. They are known by many names: backyard cottage, granny flats, in-law units and secondary units.

Adding an ADU is a great real estate investment decision that will give homeowners additional square footage and result in property value increase. Homeowners can convert their garage or backyard into living quarters and then rent it out (or sell it) to earn extra income. Homeowners can also design an ADU in which they can live themselves and rent the main house.

Benefits of an ADU


Add Additional Square Footage for Additional Comfort.



Add a rental unit quickly, and cut your mortgage payments in half.



Add value to your property in the most effective manner, in the shortest time.

What we do

Our garage conversion detached or attached ADU services include: issuing construction plans, floor plans and images, issuing architectural plans, issuing structural plans, issue title 24, approving with the city the complete set of plans, pulling permits, selecting materials using our wide range of vendors and applying all savings we get toward the customer, and conducting actual construction work from demolition to finish installation with on-site supervision at all time.

Why convert your garage or build an ADU?

  • Income: Converting your garage into a beautiful guest house has become very popular in Los Angeles. More and more homeowners are turning their unused space into monthly income via vacation, monthly and annual rentals.
  • Add Value: All additional usable square footage adds value to a home, and the ability to add rental income adds even more!  The new state law, Senate Bill No. 1069, allows California homeowners to build & permit a small second dwelling onto their property, so you need not worry about the legalities of your build.
  • For Work or Play: The passing of Senate Bill No. 1069 affords you an ideal opportunity to add the home office, yoga studio, man cave, guest house… you name it!

Call A1 Builders, Inc. Now

A Project Specialist is standing by!