We are the Southern California ADU experts!

ADUs up to 1,200 sf:
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Park Model RV

"Tiny Home"

Up to 399 SF

Available for Installation in the​

Cites of Los Angeles & San Diego

ADU Models

400 SF to 750 SF


1 Bedroom 1 Bath ​

2 Bedroom 1 Bath

2 Bedroom 2 Bath

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ADU Models

751 SF to 950 SF


1 Bedroom 1 Bath​

2 Bedroom 1 Bath

2 Bedroom 2 Bath

3 Bedroom 2 Bath

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ADU Models

951 SF to 1,200 SF


2 Bedroom 1 Bath​

2 Bedroom 2 Bath

3 Bedroom 2 Bath

4 Bedroom 2 Bath

USModular is a second generation full service design build general contractor with over 35 years of experience.  We specialize in factory built ADUs.  We offer a "One-Stop-Shop" turn key project solution for your ADU project.  Don't over complicate your ADU project; we build FASTER-BETTER-GREENER and FOR LESS!


Due to continuous product development, prices, specifications, and materials are subject to change without notice.  Square footage and other dimensions are approximate. Exterior images may be artist renderings and not intended to be an accurate representation of the home/Accessory Dwelling Unit.  Renderings, photos and floor plans may be shown with optional features or third-party additions.  All floor plans, features, site construction are subject to local code and lender approval.  

USModular, Inc.

579 W. County Line Road

Calimesa, CA  92320

Monday to Friday 9 am to 4 pm


951-679-9907, ext 1