ADU Contractor in Los Angeles
Build Construction Corporation is a licensed Los Angeles ADU contractor helping homeowners add detached, attached, and conversion accessory dwelling units across LA County.

Accessory dwelling units (ADUs) are one of the most flexible ways to add value, livable space, and rental income to a Los Angeles property. Whether you want a backyard cottage for family, a long-term rental, or a home office, the right ADU depends on your lot, zoning, and goals.
We can coordinate the full ADU process for Los Angeles homeowners, including an initial property review, design, structural and energy plans, permit processing through LADBS or the applicable local building department, and construction under one project scope.
Every project starts with a free property review so you understand what's actually possible on your lot before you spend money on plans. From there, we put together a clear scope, schedule, and budget so there are no surprises during construction.
- Detached ADUs up to 1,200 sq ft
- Attached ADUs built off your existing home
- Garage and accessory conversions
- Full permit handling with LADBS and local cities
- Licensed and insured — CSLB #1124836
How it works
Financing available
Homeowners may consider a HELOC, cash-out refinance, or construction loan. Financing is offered by third-party lenders and is subject to lender approval, rates, terms, and availability. Build Construction is not a lender.
Ask us about financingFrequently asked questions
See what you can build on your property
Use our free calculator to check eligibility, estimated rental income, and project options in about two minutes.