Serving all of Southern California B and C-47 Licensed — CA Lic. #999468
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Built ADU

Orange County

Manufactured homes & ADUs in Orange County

Orange County has some of the tightest residential lots and the highest land values in Southern California, which is exactly why a factory-built ADU pencils here. You are adding a second home without buying a second lot.

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A finished manufactured home installed on a Southern California lot
1,200Sq ft max · detached ADU
60Day permit review · AB 68
6–15Months · typical project
Typical all-in project cost $240,000 – $320,000 For a detached 800 sq ft, 2-bed, 2-bath ADU — unit, delivery, foundation, utility connections, permits and finish work. Your number moves with lot access, utility distance and city fees, which is exactly what the site visit is for. Our cost calculator gives you a range in about a minute.
Where we work

Across Orange County

We install in Anaheim, Santa Ana, Irvine, Huntington Beach, Garden Grove, Fullerton, Costa Mesa, Orange, Mission Viejo and Newport Beach — and across the rest of Orange County.

Orange County runs a mix of city and county jurisdictions, and the city you are in matters more than the county line — a permit in Santa Ana does not move at the same pace as one in Irvine. We scope your specific jurisdiction before quoting a schedule.

Whatever the jurisdiction, the scope is the same: one licensed team handling permitting, site prep, foundation, utility connections, delivery, set and finish work under California contractor licence #999468 (B General Building and C-47 Manufactured Housing).

What we build

Three ways owners use us

Common questions

Orange County questions

Yes — Orange County is one of the five counties we serve, along with the rest of Southern California. Send us the address and we will tell you what the parcel supports before anything is committed.

California caps ADU permit review at 60 days under AB 68, but that clock only starts once a complete application is in, and each city works its own queue. We scope your specific jurisdiction and give you a realistic schedule rather than a statewide average.

Three things, in order: access for the transport and the crane, how far the utilities have to run, and your city’s fees. Two identical homes on two lots in the same Orange County neighbourhood can differ by tens of thousands for those reasons alone.

Once it is on a permanent foundation and recorded through HCD Form 433A it is real property, and can generally be financed, insured and resold like a site-built home. See our guide to MH Advantage loans and ADU financing in California.

No. We manage the crane, the transport and the crew. Most owners come to watch because it is the best day of the project, but nothing needs you on site.

Tell us about your Orange County lot

Send the address and what you have in mind. We’ll come back with what the parcel supports and what happens next. The conversation costs nothing.

Start a project inquiry CA Lic. #999468 · B General Building, C-47 Manufactured Housing
Worth reading

California rules that affect your project