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Bay Area building guides.
Straight answers on what it really costs and takes to build an ADU or new home in San Francisco and the Bay Area — and how a project-management model keeps the number down.
Last updated: June 2026
How Much Does an ADU Cost in the Bay Area?
Typical 2026 cost ranges by ADU type, the factors that move the number, and how to keep it down.
Read the guide →Bay Area ADU Permit Timeline
How long permitting and construction actually take, step by step, and where the delays hide.
Read the guide →How to Choose an ADU Builder
Markup GC, design-build, prefab, or owner’s-rep — the four models compared on cost and fit.
Compare the models →How to Finance an ADU
HELOC, refi, construction and ADU loans compared — plus the ROI math.
Read the guide →Owner’s Rep vs. General Contractor
The two ways to deliver a build, side by side — and why the fee model decides your final cost.
Compare the models →Bring us your best bid.
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