Home Additions in San Jose, CA
Room and second-story additions built with upgraded insulation and efficient windows, so the new square footage doesn't spike your energy bill.
About Our Home Additions Service
When your San Jose home no longer fits your life but you love the neighborhood, an addition beats buying and moving in a market like the South Bay. We design and build room additions, second-story additions, primary-suite additions, and kitchen or family-room bump-outs that blend seamlessly with your existing roofline, siding, and finishes. We handle the structural engineering, foundation and framing, MEP tie-ins, and permits so the new space feels original to the house -- not bolted on. Every addition is engineered to San Jose seismic and building code.
What's Included
Our Process
Design & Engineering
We design the addition to match your home and bring in structural engineering for foundation, framing, and seismic requirements.
Permits
We manage the full San Jose plan-check and permit process, including any planning review for the added footprint.
Build & Tie-In
Foundation, framing, and weather-tight enclosure, then MEP tie-ins and interior finishes matched to the existing home.
Final Walkthrough
Final inspections, punch list, and handoff of warranty and permit sign-off documentation.
Why Home Additions Matters
- Add square footage without leaving your neighborhood
- Often more cost-effective than buying up in the South Bay
- Space designed exactly around your needs
- Engineered to San Jose seismic and building code
- Seamless match to your existing home
Frequently Asked Questions
Is an addition cheaper than moving in the South Bay?
Can you add a second story to my house?
Will the addition match the rest of my home?
Home Additions Service Areas
We provide home additions across San Jose and the South Bay, including:
Get a Free Quote
Free on-site estimates
Starting at
$65,000
Varies widely by size and whether it's ground-floor or second-story. Priced individually after design and engineering.
Duration
3 - 6 months
Warranty
2-year workmanship warranty
Other Services
Why Choose Us
- Licensed & Insured
- Fixed Upfront Pricing
- Permits Handled
- Free Estimates
- 2-Year Warranty
- South Bay Local
Get Your Free Estimate Today
Whether you are planning a kitchen or bathroom remodel, a backyard ADU, an addition, or a whole-home renovation, our San Jose team is ready to help. Text us or send the form for a free, no-obligation estimate.
Since 2013
South Bay Local
Licensed
& Fully Insured
10+
Cities Served
Free
Estimates Always