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Find Basement remodelers in San Francisco

Avatar for Alvarado and Son Construction, Inc.
Alvarado and Son Construction, Inc.
5.0(
3
)

Angi Approved

In business since 2018

Free estimates

Customers say: Quality work

"Jose, Jesus, and the whole crew are awesome. They put in the foundation, framed, and sided a new addition and did a great job. I have worked with a lot of contractors and Alvarado and Son are amazing. Their price was reasonable, the speed of getting the project done was lightning fast, and the whole crew are really nice people that you just like to have around. I have never had a foundation come out as dimensionally correct as they built it and their framing was outstanding. I literally had the city inspectors giving them compliments ... which just doesn't happen normally. If you have a similar project, look no further! "
1 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for BE HOME REMODELING INC
BE HOME REMODELING INC
5.0(
12
)

Angi Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"After they redid our counter tops and island, we had them paint out cabinets and build shelves up to the ceiling. The communication was on point this time and the results speak for themselves. Would definitely recommend them to anyone for any home project. "
613 neighbors recently requested a quote
Recommended by33%of homeowners
Avatar for Deleon E Hijo Construction
Deleon E Hijo Construction
5.0(
5
)

Angi Approved

Super Service Award Winner

In business since 2001

Free estimates

"Dedicated & reliable local professionals. Joe and his team were punctual, knowledgeable, personable and most of all, honest! The job was completed in time and we even extended the contract to add additional services which were equally completed with competence. We are very happy to have met them all. Highly recommended."
3 neighbors recently requested a quote
Avatar for Mt. Tam Construction
Mt. Tam Construction
4.7(
21
)

Angi Approved

In business since 1983

Free estimates

Customers say: Quick response

"from the moment we talked to Roger we knew we were in good hands. He gave us a clear idea on costs and showed us where we could save some money. His crew was amazing. Always on time and courteous. i cannot compliment them enough. they were with us for 6 weeks and we enjoyed their presence. Roger was always around for questions or certain additions we wantred to make. highly recommend them."
21 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for RG Construction
RG Construction
5.0(
8
)

Angi Approved

In business since 0

Free estimates

Emergency services offered

"Me and my wife decided recently to get our kitchen remolded. After some time searching for the right guys to do the job we settled on RG Construction. Richard, who is the owner, is a great guy and super informative. He never left any question unanswered or left us uncertain about anything. His crew works quick, and they pay attention to the tiniest detail. They absolutely are worth every dollar and I would recommend RG Construction to any homeowner, and I for sure will be giving them a call back for any work I need done in the future. Me and my wife are absolutely in love with our remodel."
9 neighbors recently requested a quote
R deLeon Construction
New to Angi

Angi Approved

In business since 2022

Free estimates

R deLeon Construction is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

21 neighbors recently requested a quote
Avatar for Masterful Construction, Inc.
Masterful Construction, Inc.
5.0(
27
)

Angi Approved

In business since 2023

Free estimates

Customers say: Quick response

"Masterful Constructions architectural and engineering expertise is unparalleled. Their attention to detail and commitment to delivering projects on time and within budget is truly impressive. Every aspect of our project was flawlessly executed."
3 neighbors recently requested a quote
Recommended by81%of homeowners
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FAQs for basement remodeling projects in San Francisco, CA

Finishing a basement turns unused square footage into livable space and returns up to 70% of what you spend when you sell your home. Beyond that resale boost, you gain a playroom, home office, or guest suite you can start enjoying right away. That mix of daily comfort and solid return on investment (ROI) makes basement finishing one of the smartest upgrades you can tackle.

In some parts of the country—especially lots on swamps, high water tables, or other wetlands—local codes prohibit basements. Saturated soil puts constant pressure on foundation walls and lets water seep in faster than any sump pump can handle. 

If your property sits on waterlogged ground, building on a slab or crawl space is often safer, more affordable, and code-compliant.

Most basements wrap up in four to eight weeks. Framing takes three to five days, with electrical and plumbing rough-ins following over the next week. Add five days for drywall, two to three for flooring, and another week for paint, trim, and punch-list items. 

Delays can happen if materials run late or your contractor’s calendar is packed, so build in a little cushion when you plan.

Whether a finished basement counts toward your home’s official square footage depends on local rules. Many areas only include below-grade space if it has code-approved egress, fully finished walls, ceilings, and floors, plus consistent heating. 

Check with your local assessor or building department before you start; meeting those standards can affect taxes, appraisals, and resale value.

Building codes require a checklist: dedicated heat and electrical service, a code-approved stairway, and at least one egress window or exterior door. Walls, ceilings, and floors must be fully finished and meet insulation, ventilation, and fire-separation standards. If you add a bedroom, you’ll also need a closet, proper clearances, and safe exits. If you change the layout later, be ready to update the space so every new room still meets today’s code.

The San Francisco, CA homeowners’ guide to basement remodelings

From average costs to expert advice, get all the answers you need to get your job done.