Room & Home Additions in Cupertino
A home addition expands your living space with a room addition or a second story engineered to match your existing home. We handle foundation, framing, roofing, tie-ins to existing systems, and finishes, plus the structural engineering and City of Cupertino permitting that additions require.
What's Included
Our Process
Feasibility & Design
We review your lot, setbacks, and goals, then design an addition that fits the home and code.
Engineering & Permits
Structural plans are engineered and submitted to the City of Cupertino for permits.
Foundation & Framing
We build the foundation, frame the addition, and tie into the existing structure and roof.
Finish & Walkthrough
Systems, insulation, drywall, and finishes are completed and inspected.
Frequently Asked Questions
How much does a home addition cost in Cupertino?
Room and second-story additions in Cupertino typically run $100,000-$350,000+ depending on size, whether it is a ground-level or second-story build, and finish level. We provide a free itemized estimate.
How long does a home addition take?
Most additions take 4-8 months including design, engineering, permitting, and construction. Second-story additions and foundation work extend the timeline.
Free Room & Home Additions Estimate
Serving Cupertino and the West Valley
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