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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon104
    Verified basement remodels reviews

Top-Rated Basement remodelers in West Islip - Updated Nov 2026

Avatar for JBL HOME IMPROVEMENTS INC
JBL HOME IMPROVEMENTS INC
4.6(
272
)
Basement - Remodel

Serving West Islip, 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."
Additional Photos
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+23

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

Serving West Islip, 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
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Alta Renovations Corp
Alta Renovations Corp
5.0(
30
)
Basement - Remodel

Serving West Islip, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"Jose Is a fantastic choice for a remodeling job. He fully remodeled my kitchen and first floor including moving walls and installing new hardwood floors. Not only are his carpentry skills exceptional but he also has an eye for detail. He is meticulous and finished each project to my high standards. Jose is a great choice as he has the skills and knowledge to fully complete any job from demo to finishing and painting."
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+26

Response time8 hrs
22 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)
Basement - Remodel

Serving West Islip, 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 West Islip, NY and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

"Definitely I would recommend this company to do remodeling work, bathroom and kitchen. They did a tremendous job and very professional. As a homeowner, you want to hire a company that reliable, neat, detail oriented, quick and efficient. For that, I am totally satisfied."
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 Jag Construction & Maintenance Inc.
Jag Construction & Maintenance Inc.
5.0(
23
)
Basement - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2020

Free estimates

Customers say: True professional

"Excellent work. We used JAG for a small bathroom remodel. Walter listened to our ideas, made great suggestions and executed the final product to perfection. We love our new bathroom and would definitely use them again for future projects."
Handymen Project
Handymen Project
Handymen Project
Handymen Project
Additional Photos

+37

4 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Reliable Home Remodeling, LLC
Reliable Home Remodeling, LLC
4.6(
29
)
Basement - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"Reliable Home Remodeling lives up to their name - they are reliable! They show up when they say they will - whether for an estimate or to do the work. Their estimates are concise with no surprises and their prices are reasonable. They use quality materials and their work is amazing! I will definitely use them again in the future and would recommend them without hesitation."
2 neighbors recently requested a quote
Recommended by68%of homeowners
Avatar for Homes & Beyond, Inc.
Homes & Beyond, Inc.
4.8(
20
)
Basement - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"

It was devine intervention that days after the storm the president of Homes and Beyond was given the wrong address to provide an estimate for a basement remediatioon job in my Rockaway neighborhood. When he knocked on my door, we struck up a conversation. I showed him my basement. He was reluctant to take a downpayment from me because I had never met him before, had no references for him, and he didn't want to spook me. Nevertheless, I had a good feeling. I gave him a deposit which he said he would not cash until I had checked out a few references. I went to the homes where he was in the process of doing work, made a few calls, and liked what I heard. He did an excellent job on the basement gutting and remediation. I then hired him to do the outdoor repairs from falling trees and to do the one floor (including new base molding, sheetrock, insulation and painting) inside my house that had water damage. He is currently in the process of renovating my basement, which includes walls (framing, sheetrocking and some cement skim-coating) floor, ceiling, insulation, etc. All of his workers must be given some kind of orientation because they are all super considerate, very neat, etc. I have no complaints and would certainly recommend Homes and Beyond.

.
"
Kitchen
Kitchen
Kitchen
Kitchen open layout
Kitchen open layout

+50

Response time6 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Loja Renovations Fine Carpentry LLC
Loja Renovations Fine Carpentry LLC
5.0(
27
)
Basement - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2024

Free estimates

Small jobs welcome

"I hired Loja Renovations to assembly a number of furniture I bought online that was very difficult to put together. They came and quickly assembled them with ease. They're very skilled and efficient. Apart from the reasonable cost, I was particularly impressed with their professionalism, their show of care for the customer and their respectful attitude. I definitely plan to use them again."
Bathroom
Bathroom
Bathroom
Bathroom
Bathroom

+5

Response time1 day
Response rate100%
Avatar for VP Quality Contracting
VP Quality Contracting
4.6(
63
)
Basement - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Great company to deal with. I had VP raise the carrier beam in my basement to provide more head room for finishing. The owner, Vinny is a great guy!! He is an expert carpenter and was able to complete the project on time and for a fair price. I will def keep his number handy for future projects. HIGHLY RECOMMEND!!"
New Door
New Door
Old Door
Old Door
Old Bathroom

+26

Response time9 hrs
Response rate93%
2 neighbors recently requested a quote
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Basement Remodel FAQs, answered by experts

Roughing in and connecting utilities are the hardest parts of finishing a basement, and they’re the parts we typically don’t recommend doing as a DIY project. Unfortunately, your finishing timeline can be extended by weeks while you wait for contractors and inspectors to install electrical wiring, plumbing lines, and heating/cooling equipment and carry out inspections.

Renovations that add functionality or more comfortable floor space generally add the most value when remodeling your home. Attic or basement finishing can add floor space without altering the home's structure, saving you renovation money while adding valuable space. Smaller improvements, such as installing smart-home components or replacing entry doors and windows, also experience high ROIs. 

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.

Anything having to do with the structure of your home, such as raising the ceiling, is usually the most expensive part of finishing a basement. Another project component that could be a surprisingly high expense is adding an exterior entrance. 

The cost of a walkout basement can be anywhere from $5,000 to $35,000.

Since DIYing a basement remodel isn't typically advised, there are some ways that you can still save money on this project without putting yourself in danger. Some ways to save money on a basement remodel include:

  • Painting walls yourself versus including in the cost of the remodel 

  • Installing light fixtures yourself

  • Choosing prefabricated fixtures, like cabinets, over custom ones

  • Choosing a budget-friendly flooring option, like laminate or vinyl flooring, and add rugs where necessary

The West Islip, NY homeowners’ guide to basement remodels

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