California / Builders / ExpanADU
Plans pre-approved by Fremont
CSLB #1122371 · EXPAND ADU INC · Corporation
Prefab ADU builder based in Fremont. Builds detached ADUs, attached ADUs, garage conversions, junior ADUs and manufactured ADUs, built in a factory and installed on site. Says it serves 31 California cities.
No ADU permits are on file under this licence in the cities we cover. Most California cities do not publish the contractor's name on a building permit, so this usually reflects what a city discloses rather than what a builder has built. Ask them directly for recent addresses and permit numbers you can look up.
Exempt from workers’ compensation is lawful and is not the same as suspended. A licensee with no employees may declare exemption. But if anyone is injured on your property while working on the job, exemption is the point at which a homeowner can become the employer of record. Ask who carries coverage for the crew and for every subcontractor before signing.
| City | Standing | ADU permits | Pre-approved plans |
|---|---|---|---|
| Fremont | Pre-approved | none | Yes |
| Santa Clara | Licensed | none | no |
www.linkedin.com/company/expandadu
The company’s own description · licence shown on their advertising matches the state register
| Model | Sq ft | Bed | Bath | From |
|---|---|---|---|---|
| ExpandADU Model Five | ||||
| ExpandADU Model Four | ||||
| ExpandADU Model Nine | ||||
| ExpandADU Model One | ||||
| ExpandADU Model Seven | ||||
| ExpandADU Model Ten | ||||
| ExpandADU Model Three | ||||
| ExpandADU Model Two | ||||
| ExpandADU Model Eight | 435 | |||
| ExpandADU Model Six | 510 |
Starting prices for a base model. They rarely include site work, utility connections, or city fees. Get a written quote against a drawing set before comparing builders on price.
Better Business BureauBirdeyeBuildZoomFindADUProsHomeAdvisor / AngiFacebookInstagramLinkedInXYouTube
ADU Standards does not issue zoning determinations and does not endorse contractors. Licence details are from the California Contractors State License Board, checked 2026-08-15. A city that pre-approves a plan has vetted the plan, not the builder. Always confirm licence standing at cslb.ca.gov before you sign anything.