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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
)
Basement - Remodel

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
)
Basement - Remodel

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
)
Basement - Remodel

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
)
Basement - Remodel

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
)
Basement - Remodel

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
)
Basement - Remodel

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
Basement - Remodel

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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Basement Remodel questions, answered by experts

Walkout basements are not generally included in a home’s square footage, although they may be if they meet certain conditions that depend on local regulations. A finished walkout basement used as a living space may be counted toward square footage in some locations as long as all codes for livable space are met.

Costs are guided by renovation scope, materials chosen, project duration, structural needs, and labor. Prioritizing tasks prevents unforeseen expenses.

When considering finishing your basement, take into account a few pros and cons:

Pros

  • Can increase the value of your home

  • Separate space from the rest of the house 

  • Customize and personalize the basement to suit your needs and style

  • Increase the amount of living space in your home

Cons

  • May not regain enough value to cover the cost of finishing

  • Lack of natural light if it’s below ground level

  • Moisture or flooding can cause costly damage

  • Installing plumbing and electrical can be messy and costly

It is generally more affordable to finish a basement than an attic, though it ultimately depends on how you plan to use the space. The average cost to finish a basement ranges from $7 to $23 per square foot, while attic renovation costs $30 to $60 per square foot. However, a simple attic conversion to a storage space will cost significantly less.

It is common for a contractor to ask for a down payment before starting a project, especially for jobs that require purchasing materials and equipment or hiring a crew. The deposit amount can range from 10% to 50% of the total job cost. While a request for up to 50% is not unusual, a contractor should not ask for more than that, and you should never pay for a project in full before the work has begun. To protect yourself, always discuss payment terms before starting and have a written contract that outlines the project timeline and expectations. Additionally, be sure to hire reputable contractors and check their licensing and insurance before the project begins.

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