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Verified Reviews for Basement Remodel pros in Sonoma, CA

*The Angi rating for Basement Remodel companies in Sonoma, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Remodel needs.

*The HomeAdvisor rating for Basement Remodel companies in Sonoma, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Basement Remodel needs.

Last update on May 22, 2026

Find Basement remodelers in Sonoma

Avatar for Bielefield Construction, Inc.
Bielefield Construction, Inc.
4.9(
8
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"We found Bielefeld Construction on Home Advisor and was surprised when Ray responded because we hadnâ t previously had a lot of luck on Home Advisor. We hired them for a master bedroom remodel and are very happy with the final outcome. We made a few changes here and there and Ray was very accommodating. All employees and subcontractors were pleasant, considerate and meticulous in what they brought to the project. We would definitely recommend Bielefeld Construction and use them again if the need arises. 5 star organization!"
Finished Fireplace Facade
Kitchen After
Kitchen After
ADA Shower Area
Before fireplace facade

+54

Response time1 day
4 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Ovation Restoration, LLC
Ovation Restoration, LLC
4.2(
102
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Ovation did a great job installing a new tiled shower in our basement bathroom. They were easy to work with on design and executed exactly what I wanted for a competitive price. However, the project took 2x the estimated time they rarely proactively communicated about timelines or who would be on the job site doing what when."
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%
2 neighbors recently requested a quote
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Avatar for Tocchini Builders Inc.
Tocchini Builders Inc.
3.7(
131
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Leo did a great job redoing our laundry area. They did a great job and went above and beyond to meet the requirements of the job. I'd recommend Leo to anyone looking to get some home projects done."
24 neighbors recently requested a quote
Recommended by92%of homeowners
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Avatar for Alvarado and Son Construction, Inc.
Alvarado and Son Construction, Inc.
5.0(
3
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 2018

Free estimates

Offers commercial services

"He is very conscientious, accurate and on time! He keeps his promises and does excellent work!"
Response time7 hrs
2 neighbors recently requested a quote
Recommended by66%of homeowners
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Avatar for Maldonado Jessy Construction
Maldonado Jessy Construction
4.3(
60
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"Such a great team, I reached out to Maldonado Jessy Construction and was very respectful, kind and helpful for my full bathroom-remodel. We truly are thankful for him to help us with a big project and others as well. The job was done very efficiently and timely."
Maldonado Jessy Construction
Maldonado Jessy Construction
Maldonado Jessy Construction
Maldonado Jessy Construction
Maldonado Jessy Construction

+25

Recommended by96%of homeowners
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Avatar for SUNRISE CONSTRUCTION & HOME IMPROVEMENT, INC.
SUNRISE CONSTRUCTION & HOME IMPROVEMENT, INC.
5.0(
1
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

We’re a locally owned and operated company that values honesty and integrity and treats your We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!\n

Call now at (650) 281-4221
Call now at (650) 281-4221
Bathroom remodel
Kitchen remodel
Kitchen remodel

+6

Response time1 day
6 neighbors recently requested a quote
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Avatar for W OROZCO CONSTRUCTION INC
W OROZCO CONSTRUCTION INC
New to Angi

Serving Sonoma, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Hello everybody my name is will orozco ceo of w orozco construction inc we are here to help you with your house project ADU Remodeling new construction we are a company what we staring the company from bottom we know all about construction the main goal is keep all the costumer happy with all the construction projects clean and safe

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Showing 1-10 of 104
Basement Remodel questions, answered by experts

Installing a bathroom in a basement isn’t a project for most homeowners. Many parts—plumbing, electricity, and carpentry—go into this project, each requiring expert-level knowledge and tools. One miscalculation can lead to very expensive repairs. Plus, some homeowner’s insurance might not pay for damages caused by a homeowner DIYing this project. You can protect yourself by allowing the pros to complete this job for you. 

Common mistakes when finishing basement walls include neglecting proper insulation, insufficient moisture management, and poor ventilation. Not addressing these issues can lead to mold growth, water damage, and discomfort. Additionally, inadequate planning, improper framing, and rushing the project can result in subpar outcomes. 

It's essential to follow best practices, seek professional guidance if needed, and prioritize thoroughness and attention to detail.

The difficulty of adding a basement to an existing house can vary depending on the house’s location, the size of the basement, and the type and condition of the existing foundation. Adding a basement is a job best handled by the pros, so you’ll need to enlist professional help for this project.

You should always use high-quality lumber for your framing in order to ensure it will last the test of time and resist moisture. Use 2-foot by 4-foot lumber that is pressure-treated for your framing.

Yes, you can add a bathroom to an unfinished basement, but you’ll want to take proper precautions if doing so. As with any bathroom addition, you’ll need to make sure that it’s approved by local building authorities first. With unfinished basements, you especially need to keep an eye on proper ventilation practices.

The Sonoma, CA homeowners’ guide to basement remodels

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

See all articles