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Basement finishing contractors in San Francisco

The 9 basement finishing contractors from Google's results for San Francisco, California, ordered by Google rating weighted by review count. No firm pays to be listed or ranked.

Last updated

Basic finish
$33,000 – $66,000framing, drywall, flooring
Full finish with bath
$66,000 – $132,000bathroom, wet bar
Cost per sq ft
$46 – $106finished area
San Francisco vs US
+32%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 1: Luxury Design-Build in San Francisco

5.0(159)out of 5, from 159 reviewson GoogleSan Francisco, CA

WDC combines architecture and construction in a design-build practice for San Francisco homes. Projects include full home renovations, kitchens and bathrooms, ADUs, new builds and outdoor living spaces, with the team reviewing scope, schedule and cost with each client up front.

(415) 416-5494 1528 Union St, San Francisco, CA 94123

Number 2: Mission Home Remodeling

5.0(56)out of 5, from 56 reviewson GoogleSan Francisco, CA

Mission Home Remodeling is a San Francisco contractor handling bathroom remodels and basement finishing.

(415) 323-1789 475 Gough St, San Francisco, CA 94102

Number 3: 415 Remodeling

5.0(6)out of 5, from 6 reviewson GoogleSan Francisco, CA

415 Remodeling pairs interior design with construction for homeowners in San Francisco, working only within the city limits. The design-build team updates older homes for modern living while keeping their original character, and it also takes on basement finishing.

(415) 742-8322 2261 Shafter Ave, San Francisco, CA 94124

Number 4: Trusted General Contractor in San Francisco CA

4.9(24)out of 5, from 24 reviewson GoogleSan Francisco, CA

Mares & Dow Construction & Skylights installs and repairs James Hardie fiber cement siding on San Francisco homes, from full replacements to targeted fixes. The company also does home remodeling, skylight work and basement finishing.

(415) 447-6136 1155 Ellis St #4, San Francisco, CA 94109

Number 5: HDR Remodeling

4.8(64)out of 5, from 64 reviewson GoogleEmeryville, CA

HDR Remodeling is a design-build firm in Emeryville serving Berkeley and other East Bay communities. It finishes basements to add living space for homes that cannot easily expand upward or outward, and also handles home additions and bathroom remodels.

(510) 845-6100 5677 Horton St, Emeryville, CA 94608

Number 6: Basement Construction Services in San Francisco, CA

No Google reviews yetSan Francisco

San Francisco Concrete Installers is a San Francisco contractor that works on basement finishing projects.

Number 7: Pros Per Development

No Google reviews yetSan Francisco

Prosper Development handles basement conversions, kitchen remodels, complete home renovations, new construction and custom homes in San Francisco. Renovation scopes can include structural reinforcement, reworked floor plans, electrical and plumbing upgrades, and new flooring and fixtures.

Number 8: Basement Finishing Contractor in the Bay Area, CA

No Google reviews yetSan Francisco

DGP Innovations finishes basements for homeowners in San Francisco and across the Bay Area, handling each project from start to finish. Converted basements can become entertainment rooms, extra bedrooms or other living areas.

Number 9: Basement Remodeling

No Google reviews yetSan Francisco

In San Francisco, Beyond The Horizon Construction Inc. remodels and renovates basements. Each job begins with an assessment of the existing space, and the crew converts lower levels into rec rooms, hangout spaces and other areas the household will use.

What basement finishing contractors charge in San Francisco

In San Francisco, a basic finish typically costs $33,000 – $66,000. Remodeling labor in San Francisco runs about 32% 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 Francisco 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 francisco", 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 Francisco: 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.