ADU & Room Addition in Cupertino, CA
San Jose ADU & Room Addition is your local design-build team for ADU & Room Addition Cupertino CA projects. We work across every Cupertino neighborhood — from Rancho Rinconada and Monta Vista to Inspiration Heights and Garden Gate — designing and building attached ADUs, detached ADUs, garage conversions, and full room additions that match your home and lifestyle.
Our services cover the full scope under one roof: feasibility, design, City of Cupertino permits, construction, and final inspection. We also handle kitchen remodeling, bathroom remodeling, whole-home renovations, and exterior work so you keep one accountable contractor from start to finish. This service complements our ADU Building and Home Addition Construction offerings.
ADU Construction
Detached ADUs, attached units, garage conversions, and JADUs — full-service from feasibility and design through permits and final inspection.
Room Additions
Single-story bump-outs, second-story additions, primary suite expansions, and family room extensions seamlessly integrated with your home.
Kitchen Remodeling
Open-concept layouts, custom cabinetry, quartz counters, designer islands, and professional-grade appliances — structural changes included.
Bathroom Remodeling
Walk-in showers, freestanding tubs, double vanities, heated floors, and custom tile. From a single bath refresh to a full luxury primary spa.
Home Renovation
Whole-house renovations covering framing, electrical, plumbing, HVAC, insulation, windows, doors, and finishes — brought up to current code.
Deck & Patio Construction
Custom decks, covered patios, outdoor kitchens, pergolas, and exterior living spaces designed to extend your entertaining capacity year-round.
Serving Every Cupertino Neighborhood
We cover the entire 95014 ZIP code, from homes along Stevens Creek Boulevard to the south Cupertino hills. Not sure if we cover your street? Give us a call at (650) 900-8598 — we almost certainly do.
Cupertino Neighborhoods We Serve
- Rancho Rinconada
- Monta Vista
- Garden Gate
- Inspiration Heights
- Inglewood
- Oak Valley
- Seven Springs
- Stevens Creek Corridor
- Fairgrove
- Linda Vista
See also: Can I Build an ADU on My Property? | ADU Building Permits
Why Cupertino Homeowners Choose Us
Building in Cupertino means working with a contractor who understands the local market, the local permits, and the local expectations for finish quality. We know Cupertino's building department, plan-check workflow, and zoning quirks — permits move faster because we submit complete, code-correct drawings the first time.
What Sets Us Apart
- Local permit expertise — familiar with Cupertino's R1 zoning, setback rules, design review, and second-story limitations
- One accountable team — project managers, carpenters, plumbers, and electricians all coordinated by us
- Fixed quotes, no surprises — detailed line-item proposals before signing; change orders only when you request them
- Premium finish quality — tight reveals, clean tile work, plumb walls, and even paint throughout
- Clean job sites — floor protection, daily cleanup, and dust containment so you can live in your home during construction
- Real warranty backing — written, transferable workmanship warranty on all projects
One Contractor, One Schedule, One Bill
Self-managing a Cupertino build means juggling architects, engineers, framers, electricians, plumbers, and city inspectors. We take all of that off your plate so you can focus on choosing finishes and watching the build go up. From the City of Cupertino permit application to the final certificate of occupancy, we handle it.