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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
Avatar for Ovation Restoration, LLC
Ovation Restoration, LLC
4.3(
101
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"We recently had an entire basement remodel completed. The outcome is phenomenal. We love the end results. The crew was great to work with and are true professionals. Their attention to detail is amazing and they cleaned up after themselves daily. I definitely recommend them for your projects. The crew is trustworthy and prompt, showing up on time every day. Thank you, Rick, Josh S. and team for making our dream a reality."
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%
7 neighbors recently requested a quote
Avatar for Groundworks
Groundworks
4.6(
19
)

Serving Sonoma, CA and surrounding areas

Approved (Corporate)

In business since 2023

Free estimates

Warranties offered

"Everything looks good after the work was done. I can finally close my bathroom door. I appreciated the fact that the foreman Erick Baez, went over what was done as they were done. I also appreciated that the two installers Manny Erickson and Jesus Villagomez also communicated with me after they were done to reassure that they did a proper job installing the jacks. Very good to know how the process was going. Great job."
Basement
Basement
Basement
Basement
Foundation

+16

173 neighbors recently requested a quote
Recommended by58%of homeowners
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
Avatar for Tocchini Builders Inc.
Tocchini Builders Inc.
3.5(
80
)

Serving Sonoma, CA and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"The owner is very nice and accommodating to any issues that may arise. Some of his workers were not good at paying attention to detail with painting. He has told us he fired them and brought in someone new. Good replacement yet noticed areas downstairs that I need to touch up that were not coated properly. Definitely less expensive than other quotes I received. Thank for the hard work."
Recommended by92%of homeowners
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
2 neighbors recently requested a quote
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

...
Showing 1-10 of 105
FAQs for basement remodeling projects in Sonoma, 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 Sonoma, CA homeowners’ guide to basement remodelings

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