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  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon57
    Verified basement remodels reviews

Top-Rated Basement remodelers in Brookline - Updated Nov 2026

Avatar for Owens Corning Basement Finishing System
Owens Corning Basement Finishing System
4.5(
533
)
Basement - Remodel

Serving Brookline, NH and surrounding areas

Approved

Super Service Award Winner

In business since 1990

Free estimates

Warranties offered

"I couldn’t be happier with the work Owens Corning Basement did remodeling my basement! From start to finish, they were professional, courteous, and attentive to every detail. The team completed the project on time and within budget, keeping me informed throughout the process. The finished basement looks amazing—bright, functional, and exactly what I envisioned. I highly recommend Owen Corning Basement to anyone looking for high-quality remodeling work!"
Media Room Before
Media Room After
Games Room Before
Games Room After
Living Room Before

+128

Response time11 hrs
72 neighbors recently requested a quote
Recommended by69%of homeowners
Avatar for IDEAL SOLUTIONS LLC
IDEAL SOLUTIONS LLC
4.8(
13
)
Basement - Remodel

Serving Brookline, NH and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I had an excellent experience with Ideal Solutions on my basement remodel. From start to finish, the team was professional, communicative, and detail-oriented. The quality of the work exceeded my expectations, and the finished basement turned out even better than I imagined. Everything was completed on time, and they made the entire process smooth and stress-free. I would absolutely recommend Ideal Solutions to anyone looking for basement remodeling or home improvement work."
17 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for KATS Construction & Remodel, LLC
KATS Construction & Remodel, LLC
4.3(
35
)
Basement - Remodel

Serving Brookline, NH and surrounding areas

Approved

In business since 2016

Free estimates

Credit card accepted

"Kats Construction & Remodel enlarged and remodeled our bathroom. We are very pleased with the quality of their work. They are cooperative to work with and go out of their way to please. The job was completed ahead of schedule. We would recommend them to anyone. C and E of Nashua NH"
Finished Kitchen Remodel
Nashua Kitchen Remodel
Bathroom
Kitchen Remodel
ATTIC BEFOR & AFTER

+64

Response time2 days
51 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for New England Home Pros
New England Home Pros
5.0(
14
)
Basement - Remodel

Serving Brookline, NH and surrounding areas

Approved

In business since 1988

Free estimates

Small jobs welcome

"NEW ENGLAND HOME PROS has remodeled 3 of our bathrooms and done the tile work in our kitchen... each time, they have exceeded our expectations! Each of the projects were finished on time, on budget and we were thrilled with the results."
Response time2 days
6 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for Green Nature Homes
Green Nature Homes
5.0(
22
)
Basement - Remodel

Serving Brookline, NH and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Excellent communication, timeliness and competency on our main bath renovation. Very happy with the result and will definitely be using this company again for our future projects. Their subcontractors were equally great."
Master Bath
Main floor bathroom
Main floor bathroom
Small space but still one of my favorites
Drywall for addition

+9

Response time2 days
Response rate93%
3 neighbors recently requested a quote
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Showing 1-10 of 255
Basement Remodel FAQs, 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. 

Kitchens and bathrooms are typically the most expensive rooms to renovate. The high cost is due to several factors, including expensive appliances like ranges, hoods, and refrigerators, as well as costly fixtures. The 'bones' of the room, such as electrical and plumbing, are also expensive to move or replace. Because of the vast amount of prep work, finishing, and specialized labor involved in a relatively small footprint, these projects can cost double or more than a living space remodel. Even when trying to renovate on a budget, kitchens and bathrooms will likely carry a hefty price tag.

Making a window in a basement larger costs an average of $4,200. You’ll need to pay an average of $550 to have a structural engineer plan the project, $500 to $1,500 for the installation labor, and an average of $2,200 for the excavation and window well installation. The remainder will go toward pulling permits, installing trim, and repairing drywall on the interior.

When choosing materials for finishing basement walls, consider factors such as moisture resistance, durability, and fire resistance. Opt for materials specifically designed for basement environments, like moisture-resistant drywall or cement board. Insulation with vapor barriers can help regulate temperature and prevent condensation. Consider using mold-resistant paints or coatings. 

Research and consult with experts to select materials that are suitable for your specific basement conditions and intended use. Prioritize quality and compatibility to achieve long-lasting and aesthetically pleasing results.

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.

The Brookline, NH homeowners’ guide to basement remodels

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