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TRUSTED BY SULLIVAN, WI HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon49
    Verified basement remodels reviews

Top-Rated Basement remodelers in Sullivan - Updated Nov 2026

Avatar for Top Bros Construction & Remodeling Inc.
Top Bros Construction & Remodeling Inc.
4.9(
84
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"The end result was beyond my expectations! The entire team of workers were extremely professional, polite and hard working. I wouldn't hesitate to recommend them to anyone. In fact I am so pleased that I am contracting with them again to remodel my kitchen."
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Full house remodel
Remodeling - Kitchen & Bathroom Project
Full house remodel

+28

Response time2 days
4 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for GRANZOW HOME IMPROVEMENT LLC
GRANZOW HOME IMPROVEMENT LLC
4.7(
14
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

Approved

Super Service Award Winner

Customers say: True professional

"Granzow Home Inprovement was amazing, from the initial meeting, to questions or concerns we had, before, during, and after the work was performed. We were pleasantly surprised mostly by the care and concern Rick and Bob took regarding their customer, which is rare in many businesses. This was our first home remodel project, we learned a lot from it, and we love our basement! Keep up the excellent service!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+38

Recommended by92%of homeowners
Avatar for Granzow Home Improvements, LLC
Granzow Home Improvements, LLC
4.1(
33
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"Rick and Bob did a wonderful job finishing our basement. They are easy to work with and take care of scheduling all the sub contractors(which were awesome too) and inspections to keep the project running smoothly. We get many compliments on the look and craftsmanship of their work. Highly recommend them!"
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+58

Response time1 day
Recommended by60%of homeowners
Avatar for Matrix Basement Finishing
Matrix Basement Finishing
4.5(
296
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

In business since 2009

Free estimates

Warranties offered

"Matrix team created an amazing remodel in our raw basement. We love the efficiency of the contractors and the explanation of the process of completing the project. We love our new basement!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+99

Response time2 days
Response rate100%
Recommended by91%of homeowners
Avatar for Midwest Home Remodeling & Design
Midwest Home Remodeling & Design
4.3(
22
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"He did a marvelous job. He was very professional and all of his work was top quality. We were so pleased with the results that we immediately hired him to remodel our guest bathroom. He has completed that task with top-notch professionalism, and we are very happy with the results. We highly recommend him and will hire him again for any future remodeling we plan to do.
"
Kitchen
Kitchen
Kitchen
Bathroom
Bathroom

+5

Recommended by94%of homeowners
Avatar for The Mini Convenience Home Repair & Services
The Mini Convenience Home Repair & Services
5.0(
6
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

The Mini Convenience Home Repair and Services specializes in home interior services that includes interior remodels, interior trimming, build bars and kitchen nooks, basement remodels, interior repair, drywall repair and patch work, interior painting, door installation and flooring installation. \n\nOn the exterior side of things we do fence and or gate installations, exterior window, door and patio door replacement, small roofing repairs or new replacement, siding, and fencing. Gutter Cleaning, excavation, demo, and trash removal. \n\nThe Mini Convenience Home & Repair Services is a small business offering competitive below market prices that includes great quality and creative work from experienced craftsmanship.

Remodeling - General Project
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project
Remodeling - General Project

+25

Recommended by100%of homeowners
Avatar for Apex Building & Remodeling LLC
Apex Building & Remodeling LLC
5.0(
4
)
Basement - Remodel

Serving Sullivan, WI and surrounding areas

In business since 2017

Free estimates

Emergency services offered

"Apex helped me update my whole house, and were great! They are very helpful, communicative, and were able to get to the job quickly! They helped my vision come to life from new flooring, drywall, painting and more. Really happy with their service, and I cannot recommend them enough!"
Basement Remodel and Bar
3 Season Porch Hudson
3 Season Porch Hudson
Response time1 day
Response rate100%
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Basement Remodel FAQs, answered by experts

Joists and beams are both part of the flooring system above your basement, with the beams spanning the length of your home and getting support from vertical posts underneath, and joists usually spanning half the width of your home with no support posts underneath. The floor joists provide even support to the subflooring and flooring above, and they distribute that load to the beams. The beams then distribute that load down through the support posts to the foundation.

For most basement remodels, you’ll want to hire a general contractor. This is for a number of reasons, but the main two are that general contractors have dedicated teams they are comfortable with, and hiring one means you only have to deal with one pro. You may also get a better project quote since they can lump all their work and subcontracting into a single quote. 

Yes, it is possible to turn a regular basement into a walkout basement. Doing so involves excavating the land around at least one side of your basement foundation, installing retaining walls to create a permanent below-grade area outside your home, and then cutting into the foundation to install an exterior door that leads out to the new space. This is an expensive and time-consuming project, but it can add a lot of value and utility to your home.

Renovations that add functionality or more comfortable floor space generally add the most value when remodeling your home. Attic or basement finishing can add floor space without altering the home's structure, saving you renovation money while adding valuable space. Smaller improvements, such as installing smart-home components or replacing entry doors and windows, also experience high ROIs. 

Physically, the most challenging part of finishing a basement is installing egress windows or doors when the space is below ground level. Mentally, the hardest part may be envisioning the project and planning around load-bearing and mechanical obstacles.

The Sullivan, WI homeowners’ guide to basement remodels

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