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Top-Rated Basement remodelers in Cornish - Updated Nov 2026

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

Serving Cornish, ME 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 A & D Renovations
A & D Renovations
4.4(
50
)
Basement - Remodel

Serving Cornish, ME and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"Entire project went very smoothly, was done in a timely manner. Both men were easy to work with, and they do not leave your property until you are 100% satisfied."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time4 days
Response rate100%
3 neighbors recently requested a quote
Avatar for Gavin Liscombe Residential Construction
Gavin Liscombe Residential Construction
4.4(
45
)
Basement - Remodel

Serving Cornish, ME and surrounding areas

Approved

In business since 2020

Offers commercial services

Customers say: True professional

"Did a wonderful job and takes pride in his work. He was adding a railing to the stairs and replacing stair treads and discovered problems with the raisers. Replaced those as well and provided a competitive price for the amount of work that was completed. We had specific concerns about having this done quickly. Gavin assisted in making sure that he was able to complete the stairs on time despite the additional work. We were happy with the work and outcome."
10 neighbors recently requested a quote
Recommended by28%of homeowners
Avatar for 506 Designs & Carpentry LLC
506 Designs & Carpentry LLC
4.4(
7
)
Basement - Remodel

Serving Cornish, ME and surrounding areas

Approved

Free estimates

Emergency services offered

"Brendon replaced my kitchen subfloors and put a new linoleum, full trim all the way around, a bathroom bifold, and even put a special touch to the trim, so I'd think of my late farther who had worked in that same kitchen many moons ago. Brendon had some challenges with old school techniques, but worked long and hard to end with flooring, trim and doorway that was beautiful and I was pleased with the outcome."
20 neighbors recently requested a quote
Avatar for Bangor Abatement, Inc.
Bangor Abatement, Inc.
4.5(
2
)
Basement - Remodel

Serving Cornish, ME and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

With a focused specialization in high-quality windows, doors, and vinyl siding, we are dedicated to protecting your home and increasing its aesthetic value. We pride ourselves on superior craftsmanship, personalized service, and installing products built to withstand harsh Maine winters. We are fully insured and licensed for Maine DEP & Federal EPA hazardous lead paint removal and building renovation, repairs and painting.\n\nWe are pleased to serve you for whatever scale of service that meets your immediate needs and/or budget realities. It would be a great chance for us to earn your trust and respect, and, perhaps, you will reward us with future handyman/handylady projects or offer out a good word to a neighbor. \n\nWE LOOK FORWARD TO WORKING WITH YOU!!

4 neighbors recently requested a quote
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Basement Remodel FAQs, answered by experts

Walkout basements cost more than other kinds of basements, and can also increase your risk of leaks as well as a loss of insulation, leading to higher heating and cooling costs. Improperly installed walkout basements may lead to structural issues with your foundation, so ensure you’re working with a contractor who has extensive experience with this kind of basement.

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.

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.

Whether it’s more affordable to gut a house than build a new one depends on the markets where you'd be buying and selling. However, it’s usually less expensive to renovate a home than to build new construction. 

Most homeowners pay between $100,000 and $200,000 for demolition and remodeling costs, whereas the average cost to build a new home is between $139,000 and $531,300.

Adding an extension or addition to your home costs more than a loft conversion in all but the rarest cases where the home's structural integrity is lacking. Because a home addition requires a new foundation section or significant structural upgrades to handle a cantilevered portion, the cost compared to almost any loft conversion is significantly greater for the same square footage.

The Cornish, ME homeowners’ guide to basement remodels

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