ADU Craft Long Beach
ADU builder · Long Beach, CA

Turn your backyard or garage into a home.

Garage conversions, backyard cottages, attached ADUs and junior ADUs for Long Beach homeowners. Design, permits and construction in one place. Licensed and insured.

See what fits on my lot See costs
Small backyard home (ADU)
Licensed & insuredLicensed, insured California contractor.
Permits handledWe prepare plans and manage the city review.
Written, itemized quoteYou see the full price before construction starts.

How much does an ADU cost in Long Beach?

As of October 2026, published cost guides put a new detached ADU in the Los Angeles area at roughly $300,000 to $450,000 or more. Garage conversions usually cost the least, because the walls, roof and slab already exist. Design, engineering, permits and utility work add to the build price. We measure your lot and quote in writing.

Read the full Long Beach ADU cost guide

What types of ADU can I build in Long Beach?

As of October 2026, Long Beach applies California ADU law. On a single-family lot that can mean one converted ADU, one new detached ADU and one junior ADU together.

Detached garage Garage conversionTurn an existing garage into a legal unit. State law does not require you to replace the parking. Small backyard home (ADU) Backyard cottageA new detached home in your rear yard, with 4-foot side and rear setbacks. Small backyard home (ADU) Attached ADUAn addition that shares a wall with your house and has its own entrance. Small backyard home (ADU) Junior ADUA unit of up to 500 sq ft inside your home or attached garage.

How we handle ADU design and permits · Compare all ADU types

How does an ADU project work?

  1. Lot checkSend your address. We look at zoning, coastal and historic overlays, and setbacks.
  2. Visit and designWe measure, then draw a plan that fits your lot and budget.
  3. PermitsWe submit plans, answer city corrections and track review.
  4. BuildConstruction, inspections and final sign-off.

See the full ADU process

Where do we build ADUs?

Long Beach and nearby cities. Each city has its own review steps, so we check yours first.

Long Beach

Alleys, coastal zone permits and historic districts all affect what fits.

Long Beach ADU notes

Lakewood

Early-1950s tract homes on lots the city itself calls small.

ADUs in Lakewood

Signal Hill

Oil wells must be located and reviewed by the state before permits.

ADUs in Signal Hill

Seal Beach

Coastal zone lots need a Coastal Commission permit.

ADUs in Seal Beach

Downey

The city offers pre-approved detached ADU plans.

ADUs in Downey

See what fits on your lot

Tell us your address and what you have in mind. We check zoning, setbacks and overlays, then tell you which ADU types fit.

Serving Long Beach, Lakewood, Signal Hill, Seal Beach and Downey.

Long Beach ADU questions

How much does an ADU cost in Long Beach? Can I convert my garage into an ADU? Do I have to replace parking if I convert my garage? Does an ADU need separate utility meters? Can I rent my ADU on Airbnb in Long Beach? Does an ADU increase home value?