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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon145
    Verified basement remodels reviews

Top-Rated Basement remodelers in Deer Park - Updated Nov 2026

Avatar for Unique Interior Finishes
Unique Interior Finishes
4.8(
39
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Customers say: True professional

"I hired Bob for our basement remodeling project and thatâ s the best decision we took. He is such a perfectionist with his job, gives right suggestions on what needs to be done, not at all money minded, and mainly manages work to be on time. He returned back to work immediately after his surgery just to meet the deadline. We are more than happy with the outcome. I sincerely recommend Bob for any work he is capable of doing and worth the decision. In fact, I kept pinging him for more suggestions even after the job is done and he is very responsive. So thankful that we were able to find Bob through my friend and he is a highly recommended person for any remodeling job."
Monica`s basement
monica`s basement
monica`s basement
Monica`s basement
Monica`s basement

+26

Response time12 hrs
Response rate95%
28 neighbors recently requested a quote
Avatar for JBL HOME IMPROVEMENTS INC
JBL HOME IMPROVEMENTS INC
4.6(
272
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Warranties offered

"They were easy to work with and the job came out great. After the basement remodel, we had them back to install bathroom and other cabinets. All went well, even with a different crew. Dave knows how to guide the customer to make good choices. Company is very dependable and prices are reasonable/competitive."
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+23

Response time1 day
Response rate100%
9 neighbors recently requested a quote
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: True professional

"Arthur gave us a fair and competitive estimate and was able to start work quickly thereafter. He and his team did an excellent job gutting and totally remodeling two bathrooms and a closet as well as redoing some of the wood flooring, moving vents, and moving hallways. Arthur himself was at the home everyday and did the important work himself. He also went the extra mile in helping us with small projects around the major project as they came up. He was extremely responsive in provided us with timely updates. When complications occurred (due to the house having not been renovated in 40 years) he was clear and helpful in keeping the project on schedule. He was extremely honest and I trusted him to be alone in my house for weeks on end with his team. I would/plan to work with Arthur again in the future for my home renovation projects."
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+20

Response time2 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Alta Renovations Corp
Alta Renovations Corp
5.0(
30
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"Jose and his team were the best team I have ever had work on a job in my house. Jose went WAY above and beyond to make sure we had our basement back in order in a timely fashion. He was willing to work after hours if needed to help get our finished basement back after we had suffered a sewage leak and had to wait until mitigation was complete. A 3-4 day job was complete in 2 days! And one of his workers, Carlos, from the second day stuck around to help me get the heavy and large items back into the basement. There was a previous review that said Jose was very emphatic to their needs and that is so true. That review actual was what made me give Jose a call. I wish there was a word better than highly recommend. Thank you Jose and your entire team!"
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+26

Response time8 hrs
18 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Northgate Home Improvement Corp.
Northgate Home Improvement Corp.
4.9(
94
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"Jeff & Crew came and did an amazing job just as they did when we had our whole basement remodeled. We hired Northgate this year once again (they remodeled and added a new bathroom to our basement back in February 2023) to redo and expand our outdoor deck to almost 1,000 square feet. Jeff and crew did an amazing job and went above and beyond. I cannot recommend or say enough about them. Jeff not only does an amazing job but added even extras that were unexpected and helped fix things that were not part of his job. I will definitely be hiring them again once I can afford more renovations! Would recommend Northgate to anyone and everyone."
Additional Photos
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+56

Response time7 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"I hired Long Island handyman construction group to remodel a 400sf basement and bathroom in Melville. They were priced in the middle compared to other bids. I picked them thanks to their out of the box advice which saved me thousands of dollars. There was one problem with the plumbing which cost an extra 1800 dollars. The owner settled with me 50/50 even though it was a pre-existing issue. The project was started early and completed early. All mess was cleaned up and the crew was very friendly and fully aware. Very reputable guys and very easy to deal with. Thanks Moises and Eddy."
before demo
kitchen demolition
demolition complete
kitchen tile job in progress
kitchen tile

+172

Response time7 hrs
Recommended by76%of homeowners
Classic Home Design & Construction, LLC
5.0(
9
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Robert did an excellent job with our kitchen remodel (replaced all cabinets, countertops & backsplash). His quote was well below the others and more comprehensive. Added costs were kept to a minimum and explained in advance. All of his workers were courteous and professional."
Westbury 2021 Bath
Westbury 2021 Bath
Westbury 2021 Bath
Westbury reverse Gable remodel
Westbury 2021 Backyard

+38

Response time10 hrs
Response rate91%
4 neighbors recently requested a quote
Avatar for LI Developers, LLC
LI Developers, LLC
4.7(
177
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"We hired LI Developers for a complete gut of our basement bathroom. They were always right on time, courteous and respectful. They coordinated all permits with the town, architects and outside contractors and provided professional opinions and input throughout the entire process. The end result was beautiful! We are very pleased and would highly recommend this company."
Contemporary Kitchen
Livingroom & Dining room
Master Bathroom
Full Bath
LiD 500

+5

Response time1 day
1 neighbors recently requested a quote
Recommended by78%of homeowners
Memo's Home Renovations, Inc.
4.9(
153
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Here's the thing... It's so good, that I'm having Memo come back to do more work for me. I knew I hired the right person when Memo was able to hit the floor running. He redid all the 8 inset lights living room lights in ONE DAY. All three of my bathrooms were remodeled and they look amazing. My basement which was a disaster now looks like something out of a magazine. I can't list all the other hundreds of other things Memo had worked on in this house but I what I can tell you is... I feel like I'm living at an exquisite AirBnb place after all said an done. I look forward to hiring to Memo again soon to help me build a pool, an outdoor kitchen, a backyard basketball court, and more."
Response time5 hrs
2 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Loja Renovations Fine Carpentry LLC
Loja Renovations Fine Carpentry LLC
5.0(
27
)
Basement - Remodel

Serving Deer Park, NY and surrounding areas

Approved

In business since 2024

Free estimates

Small jobs welcome

With over 22 years experience providing quality home improvement and repair services, backed by satisfaction our competitors can't match, isn't it time to give us a call? Whether you have small or large projects for the interior or exterior, we offer the quality you expect and the customer care you desire to make your home repair and improvement project dreams a reality today.

Bathroom
Bathroom
Bathroom
Bathroom
Bathroom

+5

Response time1 day
Response rate100%
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Basement Remodel FAQs, answered by experts

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.

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 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.

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. 

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 Deer Park, NY homeowners’ guide to basement remodels

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