Additions and Remodels Cost in San Jose, CA in 2026
Most Additions and Remodels projects in San Jose, CA cost between $62,000 and $285,000. The typical price is $135,000.
Labour and materials in San Jose run about 29% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Whether the addition needs its own foundation and roof tie-in
- Adding a bathroom or kitchen (plumbing and electrical runs)
- Structural work to the existing wall being opened up
- Local permit and inspection requirements
Usually included
- Framing, roofing and siding to match
- Electrical rough-in and finish
- Insulation, drywall and paint
- Flooring and trim
Usually extra
- Permits and architectural drawings
- Site work or tree removal
- High-end fixtures and appliances
Unit prices in San Jose, CA
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $155 |
| Mid-range | $335 |
| High-end | $720 |
Home addition and remodeling contractors in San Jose, CA
Businesses listed on Google near San Jose, CA. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Wise Builders
4.8(148 reviews)
2355 Paragon Dr Ste E, San Jose, CA 95131
Primework Construction
5.0(114 reviews)
2375 Zanker Rd #245, San Jose, CA 95131
Top Home Builders Inc.
5.0(88 reviews)
5450 Thornwood Dr E, San Jose, CA 95123
Golden View Renovation
4.9(73 reviews)
1545 Berger Dr, San Jose, CA 95112
ON Design & Remodeling
5.0(62 reviews)
1762 Technology Dr Ste 226, San Jose, CA 95110
QA Builders
5.0(49 reviews)
1917 Creek Dr, San Jose, CA 95125