Number 1: 3 Gb Uilders
on GoogleWalnut Creek, CA
3G Builders takes on basement finishing projects in Walnut Creek, California.
(925) 497-0833 2678 N Main St #7, Walnut Creek, CA 94597
Basement finishing contractors in San Jose
The 8 basement finishing contractors from Google's results for San Jose, California, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.
Last updated
- Basic finish
- $32,000 – $64,000framing, drywall, flooring
- Full finish with bath
- $64,000 – $128,000bathroom, wet bar
- Cost per sq ft
- $45 – $102finished area
- San Jose vs US
- +28%well above the US median
Licensing in California. California contractors need a CSLB license for most remodeling work. Check the license number and its bond on the CSLB site before you sign.
Number 2: Bay Side Home Builders
on GoogleSan Jose, CA
Bay Side Home Builders works as a design-build remodeler, with one crew carrying kitchen, bath and whole-home renovations from the initial design to the closing walkthrough. The company also takes on home additions, basement finishing and accessory dwelling units.
(408) 682-0554 385 Delmas Ave B, San Jose, CA 95126
Number 3: Basement Remodeling
on GoogleSan Jose
Eco Scale Construction remodels basements in Sunnyvale, Los Altos and Palo Alto, updating dated lower levels so they become part of the everyday living space. The team handles projects from early planning and consultation through construction.
Number 4: Fine General Construction
on GoogleSan Jose, CA
Fine General Construction works in San Jose and the wider Bay Area on bathroom and kitchen remodeling, accessory dwelling units, framing, and plumbing and electrical work. It also takes on general repair and installation jobs around the home.
(408) 832-6107 12390 Mabury Rd, San Jose, CA 95133
Number 5: Basement Finishing
on GoogleSan Jose
Working in and around Des Moines, Iowa, Renomads finishes basements as a single job with one crew, covering framing, egress windows, wiring, drywall, below-grade flooring, stairs and trim. Before laying out walls, the team checks for outside water issues and available headroom.
Number 6: Basement Finishing
on GoogleRaleigh, NC
Red's Remodeling handles basement finishing projects in Raleigh, North Carolina.
(919) 626-9020 3064 Wake Forest Rd #1146, Raleigh, NC 27609
Number 7: Revive General Contracting
San Jose
Revive General Contracting takes on basement finishing work in San Jose.
Number 8: Basement Finishing
San Jose
Penny Pinching Construction finishes basements in Napa, California, converting unused space into family rooms, home theaters or guest suites. Projects start with a design consultation, followed by layout and space planning before the build.
What basement finishing contractors charge in San Jose
In San Jose, a basic finish typically costs $32,000 – $64,000. Remodeling labor in San Jose runs about 28% above the US median, which accounts for most of the difference from the same project elsewhere.
How to choose between them
- Check the license yourself. Where California or San Jose licenses this work, the licensing board's own lookup confirms a license number in a minute. Do it before you sign, not after.
- Get three bids on the same scope. Written down, split into labor, materials, allowances and anything structural. Most people compare a total against a total and end up choosing between two different projects.
- Ask what is not included. Permits, debris removal, fixture and finish allowances, and repairs after demolition are the four that turn a cheap bid into an average one.
- Never pay a large deposit up front. A deposit to order materials and hold a start date is normal. Half the total before anyone shows up is not.
How this list is ordered
These are the firms from Google's results for "basement finishing san jose", with directories, chains and suppliers removed. They are ordered by Google rating weighted by review count, and the ratings shown are Google's. No firm pays to be listed or ranked. The list was last updated in October 2026.
Basement finishing contractors in San Jose: common questions
Can I put a bedroom in my basement?
Only with an emergency escape opening, usually an egress window of a minimum size with a window well, plus the ceiling height your local code requires. Without them it cannot legally be sold as a bedroom.