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  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon41
    Verified basement remodels reviews

Top-Rated Basement remodelers in Cornwall - Updated Nov 2026

Avatar for Lilco Construction Inc
Lilco Construction Inc
5.0(
10
)
Basement - Remodel

Serving Cornwall, NY and surrounding areas

Approved

In business since 2001

Free estimates

Warranties offered

"Lilco has done numerous jobs here to our Satisfaction. Owner is honest, knowledgeable about various home construction projects and easy to work with. Bring your own vision or let him help you bring a general goal/vision to life. He’s been able to help me troubleshoot with success."
1 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for Proworks Interiors
Proworks Interiors
5.0(
6
)
Basement - Remodel

Serving Cornwall, NY and surrounding areas

Approved

In business since 2012

Free estimates

Warranties offered

"We highly recommend Proworks interiors ! John responded to our inquiry for a finished basement quickly and was at our house to provide an estimate within 24 hours. He is very detail oriented , and was extremely helpful in creating a plan for our space. Throughout the entire process, he was a great communicator, promptly responding to all of our questions and concerns . He made sure every detail was exactly to our liking. We would definitely use proworks interiors again !"
Bathroom Remodel
Fireplace Wall
Fireplace wall
Bathroom Remodel
Basement Bar

+25

Response rate100%
Recommended by100%of homeowners
Kevin Babcock General Contracting
4.9(
49
)
Basement - Remodel

Serving Cornwall, NY and surrounding areas

Approved

In business since 1984

Free estimates

Offers commercial services

"From the second Kevin walked in for our estimate I could tell he was genuine and not trying to oversell or take advantage. Our project was a basement remodel for my mother who was moving in. The entire experience was wonderful, from start to finish. His team is amazing, super dedicated and we were involved in every step along the way. Kevin was always right there talking my mom through what she needed, helped her pick out her finishing touches, and even suggested we add/remove things from the remodel we would have never thought of doing on our own. He never once made us feel like we were asking too much and ANYTIME I had a question or concern he always got back to me same day. His work is top notch and his team is filled with the kindest group of men I have ever met. I didnt always make it easy, but they always delivered. We could not be more thrilled with the way things turned out, down to the last details, and would 100% call Kevin and his guys back for any future contracting needs."
Response time1 day
16 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Jafet Home Improvement LLC
Jafet Home Improvement LLC
5.0(
3
)
Basement - Remodel

Serving Cornwall, NY and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

At Jafet Home Improvement LLC, we specialize in high-quality residential remodeling focused on full renovations—not quick fixes. We handle complete bathroom, kitchen, and basement projects from demolition to final finishes, delivering clean, modern, and long-lasting results while increasing not only the comfort of your home but also its overall value.\n\nOur services include bathroom remodeling, kitchen renovations, basement finishing, interior painting, and flooring installation.\n\nWe are not a handyman service—we work with homeowners ready to invest in professional work done right. We pride ourselves on attention to detail, clear communication, and reliable timelines.\n\nIf you're planning a serious renovation, contact us to schedule an in-person estimate.\n\n\n

Response time4 days
Response rate88%
Avatar for C&O PrimeBuild LLC
C&O PrimeBuild LLC
5.0(
8
)
Basement - Remodel

Serving Cornwall, NY and surrounding areas

Approved

Free estimates

Emergency services offered

Credit card accepted

"C&O was pretty efficient . Andrew and his team was always on time and communication was always there. They worked in a few rooms in my house including my kitchen.Prices were affordable. And everything was explained in detail. Would definitely recommend to anyone looking to renovate their home."
Kitchen Renovation
Kitchen Renovation
Kitchen
Before
Porch

+5

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

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.

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.

Common mistakes when finishing basement walls include neglecting proper insulation, insufficient moisture management, and poor ventilation. Not addressing these issues can lead to mold growth, water damage, and discomfort. Additionally, inadequate planning, improper framing, and rushing the project can result in subpar outcomes. 

It's essential to follow best practices, seek professional guidance if needed, and prioritize thoroughness and attention to detail.

Yes, most general contractors require an initial down payment, typically between 10% and 25% of the total project cost. This upfront payment helps cover the costs of materials, permits, and subcontractors. The remaining project costs are usually billed after specific project milestones are reached or on set completion dates, as outlined in your contract. Be wary of contractors who require a significant deposit of 50% or more upfront, as this could be a red flag for a scam.

The average cost to remodel a basement is between $12,100 and $33,400. Depending on the project's complexity, the price can be as low as $3,500 or exceed $50,200. For a simple project like adding a home office, you might spend between $500 and $3,000. However, a more extensive project, such as adding a bathroom, can range from $6,600 to $16,500. The final cost is influenced by factors like the basement's size and condition, the type of remodel, material choices, your location, and accessibility. For an accurate price, it's best to consult with a basement remodeling team.

The Cornwall, NY homeowners’ guide to basement remodels

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