Build Construction
ADU • SB9 • Additions
Free property assessment • Los Angeles

Find Out What You Can Build on Your Property

Check if your property may qualify for an ADU, SB9 unit, or home addition in just a few steps.

4.9(127 Google reviews)
Licensed & Insured — CSLB #1124836
Serving Los Angeles since 2012

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Recent Projects

A few of the properties we have helped transform across Los Angeles.

Detached ADU — Pasadena
Garage Conversion — South Gate
Home Addition — Los Angeles

What Homeowners Say

Build Construction made the whole ADU process feel simple. From permits to final walkthrough, they handled everything.

Maria G.
Pasadena

We turned our garage into a rental unit and it is already generating income. Professional crew and great communication.

James T.
South Gate

Honest pricing, clean work, and finished on time. Highly recommend if you are considering an addition or ADU in LA.

Elena R.
Los Angeles

Helpful Information

What ADUs Cost in Los Angeles

Typical construction ranges including design, permits, and build. Every project is unique — get a free assessment for exact numbers.

Detached ADU
$150,000–$350,000
8–14 months
Garage Conversion
$80,000–$180,000
5–10 months
Attached ADU
$120,000–$280,000
7–12 months
Home Addition
$200,000–$450,000
10–18 months

Prices and timelines are estimates for planning purposes. Final costs depend on design, site conditions, materials, and city review.

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