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Find Basement remodelers in Portola Valley

Avatar for OT Bay Builders
OT Bay Builders
5.0(
77
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"We love our new deck! It’s sturdy, beautiful, and adds so much value to our backyard. The team listened to what we wanted and delivered exactly that, right down to the custom railing and built-in seating."
Broadway Kitchen Remodel
Broadway Full Kitchen remodel
Broadway Full Kitchen remodel
San Francisco Contemporary Kitchen Remodel
San Francisco Contemporary Kitchen Remodel

+81

Response time12 hrs
Response rate98%
2 neighbors recently requested a quote
Avatar for Geico Builders
Geico Builders
5.0(
43
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2013

Free estimates

Warranties offered

"Geico Builders did an amazing job on our bathroom remodel. From the first consultation to the final walkthrough, the team was prompt, professional, and easy to work with. They moved fast but still delivered excellent workmanship. The workers were polite and always cleaned up before heading out, which we really appreciated. Our bathroom looks beautiful now, and the whole project was completely stress-free thanks to them."
Composite Deck Replacement Trex
Full Backyard Remodel with Outdoor Kitchen
Remodeling - Kitchen & Bathroom Project
Deck Replacement Composit
Composite Deck

+270

Response time1 day
8 neighbors recently requested a quote
Recommended by76%of homeowners
Avatar for New Generation Painting & Builders Inc.
New Generation Painting & Builders Inc.
4.9(
53
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

In business since 2020

Free estimates

Credit card accepted

"The job included prepping and painting my 1400 sq ft home and picket fence. It also included demo-ing the old window boxes that were structurally built into the walls, and custom-building new ones. In addition, a garden shed that had been built onto the back of my home was also demolished. Ivan was great to work with - very collaborative and responsive and has a good eye for esthetics. The work was exceptionally high quality. The team shows up early and works hard. It was also super-convenient that Ivan is licensed in carpentry as I didn't have to deal with custom window-boxes as a separate project. Last note is that as a single woman, it is important to me to feel comfortable with the people around my home. Ivan's team, including his wife who is often onsite, are so friendly and always respectful. They will be my go-to for all future projects."
TRELLIS STAIN
FRONT DOOR
KITCHEN CABINETS REFINISH
STAIN TO PAINT
EXTERIOR PAINTING  PROJECT

+145

Response time2 hrs
Response rate94%
12 neighbors recently requested a quote
Avatar for Northwest Builders & Renovation, LLC
Northwest Builders & Renovation, LLC
5.0(
11
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

Super Service Award Winner

In business since 2019

Free estimates

Emergency services offered

"I recently had the pleasure of replacing my roof with Isaac, Jonathan, and their team, and I couldn't be more pleased with the outcome. They were really nice, professional, and on time from beginning to end. They went above and beyond by guiding me through the insurance procedure and making sure I received full compensation for the damage. The entire procedure was stress-free thanks to their support and outstanding communication."
Leslie House Remodel
Leslie House Remodel
Leslie House Remodel
Leslie House Remodel
Leslie House Remodel

+30

Response time11 hrs
Response rate99%
5 neighbors recently requested a quote
Avatar for Future Vision Remodeling
Future Vision Remodeling
4.0(
8
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

In business since 2013

Free estimates

Credit card accepted

"The bathroom remodel went well. The completed work was beautiful and completed on time. Especially great job on the tile work. Would definitely hire again"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+555

Response time7 hrs
Response rate100%
4 neighbors recently requested a quote
Avatar for Ovation Restoration, LLC
Ovation Restoration, LLC
4.7(
78
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

In business since 1997

Free estimates

Emergency services offered

"Ovation Restoration did an excellent job with our home improvement project. In our master bedroom, to take advantage of a fantastic view, they removed a large window from one wall, sealing it up like new, and installed a similar window on another wall. The work was performed quickly and skillfully, with great results. They also turned the double door leading into that room into a single door, creating more space in the room. Concurrently, in the guest bathroom, the old tub was removed, and a beautiful walk-in tiled shower was installed, along with a window with a fantastic view. The project manager Rick was a pleasure to work with, and his team were all professional, conscientious, and friendly. Everything turned out just as we imagined. We would highly recommend Ovation Restoration."
Breathtaking solid slab granite countertops
Walk-in shower with sliding glass door
Handicap accessible with style
New lighting
Antique white custom cabinets

+133

Response time10 hrs
Response rate93%
8 neighbors recently requested a quote
Avatar for Sidex Construction
Sidex Construction
5.0(
8
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

In business since 2015

Free estimates

Emergency services offered

"Sidex Siding and Decking did an incredible job on my deck! The quality of their work is evident in every detail, and the materials they used are built to last. The team was professional, efficient, and easy to work with. They delivered exactly what I wanted, and the final result looks amazing. All my family and friends absolutely love the new 25x30ft deck! Highly recommend them for anyone needing a well-crafted deck!"
Full Siding Remodel
Deck Installtion
Deck Installtion
Custom Deck Rebuild
Custom Deck Rebuild

+44

Response time1 day
Response rate99%
11 neighbors recently requested a quote
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.3(
21
)

Serving Portola Valley, CA and surrounding areas

Angi Approved

In business since 2017

Free estimates

Customers say: True professional

"Leo was very helpful and quick to respond. We’re happy with how our 2 bathrooms turned out. Project was completed within the time promised. Our only complaint is that the workers did not clean up very well. But overall, we’re satisfied and we’ll use them again. "
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+1

Response time6 hrs
Recommended by28%of homeowners
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FAQs for basement remodeling projects in Portola Valley, 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 Portola Valley, CA homeowners’ guide to basement remodelings

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