Region guide / Alameda County, CA
Find builders, designers and plan vendors to research for your project. Search by name, service or city, then review the evidence behind each listing.
Listings are drawn from public sources and may be incomplete or dated. They are not endorsements. Confirm ADU experience, service area and current licensing before hiring.
63 matching records · Showing 1–12
preapproved plan vendor · license evidence: 1132916
749 sq. ft. 2 bedroom 1 bath ADU
The source lists these plans as under review, not approved. Confirm current status with the city.
Source record: 2026-05-20
View listing source ↗Provider websiteprefab modular
Listed on San Mateo County Second Unit Center vendor-fair list as a modular/SIP/kit builder
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websiteprefab modular
Provider is a Bay Area prefab ADU company and appears on the San Mateo County Second Unit Center vendor-fair list
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitedesign build
Listed on San Mateo County Second Unit Center vendor-fair list as a design/build provider
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitedesign build · license evidence: 1126603
Provider pages advertise ADU builder services in Alameda and San Leandro
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitedesign build · license evidence: 867059
Provider website says it designs, permits, and builds turnkey ADUs in Alameda
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitecontractor · license evidence: 914001
Provider website advertises ADU construction throughout Alameda and San Mateo Counties
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitearchitect designer
Provider website lists accessory dwelling unit architecture work and Oakland address
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitecontractor · license evidence: 807757
Provider website lists remodeling, additions, and ADU services in the Oakland Bay Area
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitepreapproved plan vendor · license evidence: 1104475
499 sq. ft. 1 bedroom 1 bath ADU
The source lists these plans as under review, not approved. Confirm current status with the city.
Source record: 2026-05-20
View listing source ↗Provider websitearchitect designer
Listed as an Oakland architect on the City of Alameda facade-grant vendor list; county ADU guidance recommends licensed design professionals
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider websitecontractor
Provider page advertises ADU design/build services in Hayward, Oakland, and San Francisco
Found in public source research. ADU experience, service area and current license require confirmation.
Source record: 2026-05-20
View listing source ↗Provider website