ADU Construction in San Mateo — What We Do
California's ADU laws have transformed Bay Area properties into multi-unit assets. We design and build ADUs that comply with state ADU statutes and each city's local ordinances — from Palo Alto to San Jose to San Francisco — so the project moves fast and the finished unit holds long-term value.
San Mateo homeowners have hired us for adu construction 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 ADU Construction Project
- Detached ADUs (new construction, up to 1,200 sq ft)
- Attached ADUs (additions to the primary dwelling)
- Junior ADUs (JADUs) within the existing footprint
- Garage conversion ADUs
- Full architectural design and engineered structural plans
- Title 24 energy compliance and CALGreen documentation
- Independent utility metering when required
- All trades: framing, electrical, plumbing, HVAC, roofing, finishes
- Site work, foundation, and drainage
- Permit submittals and full City inspection coordination
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
