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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
74 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
53 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
5 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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Basement Remodel FAQs, answered by experts

Basements are commonly converted into game rooms. The potential challenges you may run into include controlling moisture, working with low ceilings, limited natural light, and the need for additional electrical or HVAC work. Addressing these issues can add to the total cost, but it ensures a comfortable and functional space.

Framing a basement takes three to five days, on average, when completed by a professional, though it may take longer for a larger space. Keep in mind this doesn’t include the time to complete the design, obtain permits, and install the drywall on the framing. On average, fully finishing a basement takes an average of 45 days.

If you don’t have a crawl space but have a partial basement you want to make deeper, you can expect to spend a little less—between $40,000 and $90,000 on average. However, if you’re not adding new finished square footage, you won’t see much in the way of ROI.

The average cost of remodeling a basement is $30 to $75 per square foot. If your space is unfinished and looks like it may need more help, use the higher number when calculating your estimated basement remodeling costs. A good rule of thumb is to add an additional 20% to the top of your estimate to cover any “what if” situations.

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.

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.