Bay Area Home Addition Contractor. more house, dense lot.
Bay Area additions are constrained by lot size, setbacks, height limits, and (in many cities) design review boards. We deliver single-story rear additions, second-story pop-tops, and side additions across the East Bay, Peninsula, and South Bay.
Licensed California contractor · CSLB #1098432 · Bay Area desk · city-by-city review
About Home Additions in Bay Area
Every project is a fixed-scope contract covering structural, city permits, MEP, framing, and finish.
What we resolve before drawings begin.
- 01
Foundation and seismic capacity
Second-story additions on older Bay Area homes often need foundation strengthening and seismic retrofit. We commission an engineer at feasibility.
- 02
Hillside grading
Bay Area hillside lots carry export-of-fill limits, drainage rules, and engineered foundation requirements. We address these up front.
- 03
Design review
Berkeley, Palo Alto, parts of SF, and others run design review boards for additions. We engage them at concept, not at permit.
Other Bay Area services.
All Bay Area services →Bay Area · Home Additions FAQ
Questions Bay Area homeowners ask first.
Start a Bay Area addition brief. We'll review zoning, foundation capacity, design review (if any), and a fixed-scope contract.
What does a Bay Area addition cost?
Typical Bay Area additions run $650–$950 per added square foot all-in.How long does a Bay Area addition take?
12–18 months brief-to-keys including design, permits, and construction.
Begin your projectin twenty minutes.
A short feasibility review of your lot — what you can build, roughly what it costs, and how long it will take. Free of charge. No sales call afterwards unless you ask for one.
- No obligation
- Reply within 24 hours
- BBB A+ Accredited