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Best basement remodelers near Los Altos, CA

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Top-Rated Basement remodelers in Los Altos - Updated Nov 2026

Avatar for Geico Builders
Geico Builders
5.0(
62
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Warranties offered

"We hire Geico builders for our kitchen remodeling project, and I'm happy to share my experience: Working with Zaya and Geico Builders was a great decision. They were professional, friendly, and easy to work with. From the start, the process was smooth and efficient. The craftmanship of my remodel kitchen and attention to detail were exceptional, and the end result far exceeded my expectations. From the design phase to completion, their communication was excellent, and I felt completely at ease with them working in my home. The design solutions completely transformed my kitchen, making it both functional and beautiful. I highly recommend Geico Builders for anyone looking for a stress-free and satisfying remodeling experience."
Composite Deck Replacement Trex
Full Backyard Remodel with Outdoor Kitchen
Remodeling - Kitchen & Bathroom Project
Deck Replacement Composit
Composite Deck

+270

Response time1 day
Response rate100%
12 neighbors recently requested a quote
Avatar for Cal Green Remodeling
Cal Green Remodeling
5.0(
18
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved (Corporate)

In business since 2015

Free estimates

Emergency services offered

"We were looking to remodel our kitchen or bath for a few years. We kept getting estimates from different companies and always felt the price was off or the person was not a good fit. Then, finally, we met Shai with Cal Green Remodeling. What a great guy! He is very upfront and honest about what we can expect in terms of cost and work flow. Because of his honest approach, we hired him. We felt he gave us the good and bad and how to resolve the bad as well. In the end, the process was fairly smooth, and the few hick-ups we had, for example, the city and their permit process, were well explained to us at the beginning, so we were ready. Our kitchen or bath looks amazing, and I plan to work with Cal Green Remodeling again. Thanks Shai!"
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California
Outdoor Gazebo Kitchen Morgan Hill California

+51

Response time1 day
Response rate100%
11 neighbors recently requested a quote
Avatar for OT Bay Builders
OT Bay Builders
4.9(
128
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"We couldnâ t be happier with our kitchen remodel by O.T Bay Builders. The team was skilled and provided excellent recommendations. The result is a kitchen we love"
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 rate100%
1 neighbors recently requested a quote
Avatar for Herman Construction Company
Herman Construction Company
5.0(
23
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"I hired Karol for a bathroom remodel and Im very happy with how it turned out. Karol was great to work with. Very friendly, professional, communicative and detail oriented. I would definitely recommend him."
Home Addition
Home Addition
Home Additon
Home Additon
Home Addition

+25

Response time7 hrs
Recommended by78%of homeowners
Avatar for BEAR Remodeling Inc.
BEAR Remodeling Inc.
4.8(
29
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved

In business since 2019

Credit card accepted

Customers say: True professional

BEAR Remodeling is a full-service design-build contractor specializing in homeowners projects that are planning larger renovations and that require expert designing, permitting , and quality craftsmanship from start to finish. ADU's, additons, Garage Conversions, Loft and Basement conversions, and Full Kitchen and Full Bathrooms- If you do not see your project listed * Please call us!! Don't wait to create your dream home! ? Our new financing options make your remodel projects affordable NOW. ? Limited-time rates available?click the link to get started! ??https://www.enhancify.com/bear-remodeling-inc (we do not work with modular/trailer homes or offer handyman services.)

Project Photos
16 neighbors recently requested a quote
Recommended by69%of homeowners
Avatar for McCormick Home Builders, Inc.
McCormick Home Builders, Inc.
4.7(
42
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: True professional

"We hired McCormick Home Builders to remodel our living room, and we are beyond pleased with the result. The team was professional, worked efficiently, and Aris design ideas made a huge difference. The room feels so much brighter and more spacious. This was the best decision we made for our home, and we were already planning our next remodel with them."
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.
.
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+1

Response time6 hrs
Recommended by17%of homeowners
Avatar for Gold Bay Builders, Inc.
Gold Bay Builders, Inc.
5.0(
10
)
Basement - Remodel

Serving Los Altos, CA and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"We needed an additional office space within our home. The concerns were removing an existing fireplace and hearth and replacing the hardwood floor to match what was already there, removing the chimney and patching the roof, moving a heating vent and again, patching the hardwood floors to match, adding an interior door, and moving lighting and electrical outlets. David was onsite everyday to either do the work himself or oversee the work by his subcontractors. They do quality work. The floors look great, the new wall is perfect, the roof was done well, the new interior door was installed well and looks like it was always meant to be there. Also, the work site was always cleaned up at the end of each work day. David is also very flexible, easy to communicate with, seems to truly care about your project, and works with contractors who do quality work."
9 neighbors recently requested a quote
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Basement Remodel FAQs, answered by experts

Some older homes have toilets in the basement to combat sewage backups. This type of toilet, also known as a Pittsburgh potty, acted as a safety valve over the incoming sewer line. If a line backed up, it would back up into the toilet because it was the lowest fixture in the home, keeping it out of sight and away from the finished areas of the house.

Basement toilets were also used by workers with messy jobs, like those who worked in coal mines or steel mills. This way, they could clean up and avoid tracking dirt through their home.

Unless you have extensive experience in construction work, remodeling a basement is best left to a professional. There are several tasks associated with this project that require exact precision, including:

  • Replacing insulation 

  • Replacing carpet or other flooring 

  • Adding heating and cooling

  • Adjusting or adding walls and doors

  • Altering or adding plumbing elements

If any of these elements is done incorrectly, it could severely impact the quality of your basement remodel and be dangerous. Changing a basement often comes with code safety requirements, like egress windows and proper ventilation. Therefore, leaving it up to a professional is often the best decision.

To determine if your basement walls are suitable for finishing, assess their structural integrity and moisture conditions. Look for any signs of damage, such as cracks, bowing, or excessive moisture. Ensure proper drainage and address any underlying issues before proceeding. 

Consult with a professional if you're uncertain about the structural stability or potential risks associated with finishing your basement walls.

Save money on your basement finishing project by making cost-effective decisions such as minimizing structural changes and avoiding costly construction revisions. DIY simpler tasks such as painting or basic cleanup to reduce labor costs. You can also opt for energy-efficient fixtures and materials that may qualify for rebates or tax incentives.

There are several small, inexpensive upgrades you can make to upgrade your basement. Although you still need to adhere to building codes and obtain permits when necessary, you can complete small but mighty tasks like painting the masonry walls and installing entertainment devices to make the space more usable. 

The Los Altos, CA homeowners’ guide to basement remodels

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