Top-rated basement remodelers.

Get matched with top basement remodelers in Portola Valley, CA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Basement remodelers in Portola Valley

Avatar for OT Bay Builders

OT Bay Builders

4.99(
77
)
•Approved Pro

OT Bay Builders

4.99(
77
)
•Approved Pro
Super Service Award
Customers say: Quick response
5 years of experience
Free onsite estimate

At OT Bay Builders, we believe every home tells a story — and we’re here to help you write yours. Serving homeowners across the Bay Area, we deliver high-quality remodeling built on craftsmanship, transparency, and lasting value. With over five years of proven experience and hundreds of successful projects, we take pride in honest communication, detailed project management, and results that exceed expectations. From your first consultation to final walkthrough, you’ll enjoy a smooth, stress-free process backed by a dedicated team that cares about your vision. Your home is more than a project — it’s a reflection of your lifestyle and dreams. At OT Bay Builders, we build homes that last, experiences that matter, and client relationships rooted in trust. Your dream is our passion. Let’s bring it to life with craftsmanship, integrity, and care. Contact OT Bay Builders today to schedule your free consultation or project estimate.

"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."

Kolber S on April 2025

At OT Bay Builders, we believe every home tells a story — and we’re here to help you write yours. Serving homeowners across the Bay Area, we deliver high-quality remodeling built on craftsmanship, transparency, and lasting value. With over five years of proven experience and hundreds of successful projects, we take pride in honest communication, detailed project management, and results that exceed expectations. From your first consultation to final walkthrough, you’ll enjoy a smooth, stress-free process backed by a dedicated team that cares about your vision. Your home is more than a project — it’s a reflection of your lifestyle and dreams. At OT Bay Builders, we build homes that last, experiences that matter, and client relationships rooted in trust. Your dream is our passion. Let’s bring it to life with craftsmanship, integrity, and care. Contact OT Bay Builders today to schedule your free consultation or project estimate.

"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."

Kolber S on April 2025


Avatar for New Generation Painting & Builders Inc.

New Generation Painting & Builders Inc.

4.92(
53
)
•Approved Pro

New Generation Painting & Builders Inc.

4.92(
53
)
•Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
6 years of experience

Ivan Moreno Dominguez 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.

"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."

Melanie L on August 2025

Ivan Moreno Dominguez 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.

"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."

Melanie L on August 2025


Avatar for Northwest Builders & Renovation, LLC

Northwest Builders & Renovation, LLC

5.00(
11
)
•Approved Pro

Northwest Builders & Renovation, LLC

5.00(
11
)
•Approved Pro
Super Service Award
7 years of experience
Free onsite estimate

With over 20 years of experience, Northwest Builders & Renovation delivers top-quality roofing, siding, decks, gutters, and remodeling services across Seatac, WA, Portland, the East San Francisco Bay Area, and San Diego. Licensed and trusted, our team brings innovation, craftsmanship, and integrity to every project — from custom remodels to complete home transformations. 📍 Seatac, WA | Portland, OR | East Bay, CA | San Diego, CA 📞 WA (206) 350-6331 | OR (503) 713-6048 | CA (925) 407-4616 / (442) 291-2226

"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."

Govend S on May 2025

With over 20 years of experience, Northwest Builders & Renovation delivers top-quality roofing, siding, decks, gutters, and remodeling services across Seatac, WA, Portland, the East San Francisco Bay Area, and San Diego. Licensed and trusted, our team brings innovation, craftsmanship, and integrity to every project — from custom remodels to complete home transformations. 📍 Seatac, WA | Portland, OR | East Bay, CA | San Diego, CA 📞 WA (206) 350-6331 | OR (503) 713-6048 | CA (925) 407-4616 / (442) 291-2226

"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."

Govend S on May 2025


Avatar for Future Vision Remodeling

Future Vision Remodeling

4.00(
8
)
•Approved Pro

Future Vision Remodeling

4.00(
8
)
•Approved Pro
Customers say: True professional
13 years of experience
Free onsite estimate

At the heart of Future Vision Remodeling is years of design-build experience. This means we handle all levels of projects from new construction to commercial conversions. We excel at kitchen remodeling as well as designing and installing luxury baths in San Jose. Outside your home we are just as capable. Look through our portfolio for the hard-scape, patio, and deck designs. We consider communication to be the most important part of the project and we promise to keep you informed about progress daily. We also promise to make sure all your questions are answered throughout the project. In the San Jose area, You can count on Future Vision Remodeling to be the only San Jose remodeling contractor you will ever need.

"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"

mona lisa m on December 2021

At the heart of Future Vision Remodeling is years of design-build experience. This means we handle all levels of projects from new construction to commercial conversions. We excel at kitchen remodeling as well as designing and installing luxury baths in San Jose. Outside your home we are just as capable. Look through our portfolio for the hard-scape, patio, and deck designs. We consider communication to be the most important part of the project and we promise to keep you informed about progress daily. We also promise to make sure all your questions are answered throughout the project. In the San Jose area, You can count on Future Vision Remodeling to be the only San Jose remodeling contractor you will ever need.

"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"

mona lisa m on December 2021


Avatar for Plumbing 1 Builder's Inc

Plumbing 1 Builder's Inc

5.00(
14
)
•Approved Pro

Plumbing 1 Builder's Inc

5.00(
14
)
•Approved Pro
Super Service Award
15 years of experience
Free onsite estimate

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guaranteeing your satisfaction!

"These guys were great. Fixed the issue and went above and beyond with a few extra repairs. Professional and cleaned up everything. I will definitely reach out again for any work in the future."

Casey G on November 2025

We're a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. Our services are customized to the individual project, paying close attention to the details of each project that we're involved with. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guaranteeing your satisfaction!

"These guys were great. Fixed the issue and went above and beyond with a few extra repairs. Professional and cleaned up everything. I will definitely reach out again for any work in the future."

Casey G on November 2025


Avatar for Ovation Restoration, LLC

Ovation Restoration, LLC

4.72(
78
)
•Approved Pro

Ovation Restoration, LLC

4.72(
78
)
•Approved Pro
Customers say: True professional
29 years of experience
Free onsite estimate

With over 20 years of experience serving Washington and Oregon , Ovation Restoration, LLC is the solution for all your construction needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to develop a lasting relationship, so that the next time service is needed there will be no question on who to call. Our master craftsmen are highly skilled in kitchen and bathroom remodeling, carpet and flooring, roofing, room additions, siding removal and installation, decking, and more!

"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."

Ken B on November 2025

With over 20 years of experience serving Washington and Oregon , Ovation Restoration, LLC is the solution for all your construction needs. We take great pride in our extreme professionalism, timeliness, and superior customer service on every job. We make sure to develop a lasting relationship, so that the next time service is needed there will be no question on who to call. Our master craftsmen are highly skilled in kitchen and bathroom remodeling, carpet and flooring, roofing, room additions, siding removal and installation, decking, and more!

"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."

Ken B on November 2025


Avatar for Prosper Construction Development, Inc.

Prosper Construction Development, Inc.

4.88(
38
)
•Approved Pro

Prosper Construction Development, Inc.

4.88(
38
)
•Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
13 years of experience

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer a variety of services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!

"Fast response and clear communication throughout the process."

Marco T on April 2025

We are a locally owned and operated company that values honesty and integrity, and treats your home as if it were our own. We offer a variety of services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships, and guarantee your satisfaction!

"Fast response and clear communication throughout the process."

Marco T on April 2025


Avatar for RG Construction

RG Construction

5.00(
8
)
•Approved Pro

RG Construction

5.00(
8
)
•Approved Pro
Free onsite estimate
Emergency services offered

We have been in the construction industry for over 10 years. From building ADUs, high-end kitchen remodels, bathroom remodels and home extensions, we have done just about everything under general construction. Our company prioritizes safety, quality and transparency.

"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."

Jesse O on November 2025

We have been in the construction industry for over 10 years. From building ADUs, high-end kitchen remodels, bathroom remodels and home extensions, we have done just about everything under general construction. Our company prioritizes safety, quality and transparency.

"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."

Jesse O on November 2025


Avatar for McCormick Home Builders, Inc.

McCormick Home Builders, Inc.

4.31(
21
)
•Approved Pro

McCormick Home Builders, Inc.

4.31(
21
)
•Approved Pro
Customers say: True professional
9 years of experience
Free onsite estimate

MCCORMICK HOME BUILDERS INC We're a locally owned and operated company that values honesty and integrity and treats your home or business as if it were our own. We are experts in all aspects of roofing projects and our services are customizable to each individual project. We specialize in both installations and replacements. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"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. "

Yolanda F on October 2025

MCCORMICK HOME BUILDERS INC We're a locally owned and operated company that values honesty and integrity and treats your home or business as if it were our own. We are experts in all aspects of roofing projects and our services are customizable to each individual project. We specialize in both installations and replacements. We pride ourselves on the quality of our work as well as our commitment to outstanding results. We look forward to building lasting relationships and guarantee your satisfaction!

"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. "

Yolanda F on October 2025


Avatar for Golden State Home Solutions LLC

Golden State Home Solutions LLC

5.00(
6
)
•Approved Pro

Golden State Home Solutions LLC

5.00(
6
)
•Approved Pro
43 years of experience
Free onsite estimate

Golden State Home Solutions proudly serves our customers with integrity and attention to the details that matter most to you. That commitment is what sets us apart. We started this company because we believe California houses deserve to feel like homes. Building and improving homes is not just our job, it is what drives us. Whether we are building from the ground up, remodeling a kitchen, installing a new roof, upgrading HVAC, or pouring concrete, we approach every project with the same mindset. Do it right the first time. We built this company to help beautify California while proving that contractors can be reliable, honest, and fully committed to their work. Every project carries our name, and we stand behind it. Give us a call today and let’s build something great together.

"We found Golden State HS after our last contractor didn't quite meet the standards and really put a bad taste in our mouth in regards to contractors. All of that changed once we decided to work with Lilith and her team who not overseen the project but ensure our new home was built beautifully and even better than we could have imagined it. We loved how thorough Golden State HS's team communicated every step and the reality of the process. Now we not only have a wonderfully constructed home with a pool, tennis court and beautifully landscaped property (they do it all), but we have what really feels like home. I would not only be reaching out to them for my next project, but i will also be referring them to everyone we know."

Jessica R on March 2026

Golden State Home Solutions proudly serves our customers with integrity and attention to the details that matter most to you. That commitment is what sets us apart. We started this company because we believe California houses deserve to feel like homes. Building and improving homes is not just our job, it is what drives us. Whether we are building from the ground up, remodeling a kitchen, installing a new roof, upgrading HVAC, or pouring concrete, we approach every project with the same mindset. Do it right the first time. We built this company to help beautify California while proving that contractors can be reliable, honest, and fully committed to their work. Every project carries our name, and we stand behind it. Give us a call today and let’s build something great together.

"We found Golden State HS after our last contractor didn't quite meet the standards and really put a bad taste in our mouth in regards to contractors. All of that changed once we decided to work with Lilith and her team who not overseen the project but ensure our new home was built beautifully and even better than we could have imagined it. We loved how thorough Golden State HS's team communicated every step and the reality of the process. Now we not only have a wonderfully constructed home with a pool, tennis court and beautifully landscaped property (they do it all), but we have what really feels like home. I would not only be reaching out to them for my next project, but i will also be referring them to everyone we know."

Jessica R on March 2026

...
Showing 1-10 of 517
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.