Room Additions in San Mateo — What We Do
An addition done right looks like it was always part of the house. We handle structural engineering, foundation tie-ins, roofline integration, and finish matching so the new space feels native — not bolted on.
San Mateo homeowners have hired us for room additions projects across the city. As a fully licensed California general contractor (CSLB #1008964) with 11 years of Bay Area experience, we know exactly what San Mateo permitting, construction conditions, and homeowner expectations look like.
San Mateo Permits & Process
San Mateo has streamlined ministerial review for ADUs that meet state and city standards, and a relatively efficient plan check process for typical remodels. Most kitchens and bathrooms can be permitted in 4–6 weeks; additions and ADUs in 6–10 weeks.
Scope Included in Every San Mateo Room Additions Project
- Single-story additions and bump-outs
- Full second-story additions
- Primary suite additions
- Family room and great room expansions
- Foundation work and structural tie-ins
- Roofline matching and integration
- Stucco, siding, and exterior finish matching
- HVAC, electrical, and plumbing extensions
Why San Mateo Homeowners Choose Us
- Licensed CSLB #1008964, bonded and insured
- Fixed-scope written proposals — no vague allowances
- One dedicated project manager from contract to final inspection
- Full permit handling with the City of San Mateo
- Weekly written progress updates
- Daily cleanup and dust containment
- Written workmanship warranty
