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Top-Rated Basement remodelers in Greenlawn - Updated Nov 2026

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

Serving Greenlawn, 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 Greenlawn, 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 Northgate Home Improvement Corp.
Northgate Home Improvement Corp.
4.9(
94
)
Basement - Remodel

Serving Greenlawn, NY and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"I first asked Jeff at Northgate to take out our old basement bathroom and build a new one 4 years ago. He did a great job for a reasonable price. He recently completed a total basement renovation and upstairs bathroom. Everything down to the studs. Again, did a wonderful job in about a month. He really deserves all the excellent reviews he has had. He always keeps you in touch and fixes any problems right away. We will be happy to have him do our kitchen soon. You will not find anyone better."
Additional Photos
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Additional Photos

+56

Response time7 hrs
Response rate100%
2 neighbors recently requested a quote
Avatar for Alta Renovations Corp
Alta Renovations Corp
5.0(
30
)
Basement - Remodel

Serving Greenlawn, 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."
Additional Photos
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+26

Response time8 hrs
22 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Basement - Remodel

Serving Greenlawn, NY and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: True professional

"

This is the 2nd major project I contracted Art DeRosa & Co for.  The 1st being 4 years ago a major living room/family room renovation which was hugely successful.  That 1st experience led me to award Art (after several other competitive quotes) this 2nd and far larger & more complex project.







Overall it went well but this was a complicated project encompassing all the typical trades and expertise of building a new luxury house but far more complicated because it was a renovation performed while we were living in the home. Dust partition walls with wood framing had to be erected in several locations in the house which included temporary doors for entering and egress in certain areas of the remaining living areas of the house in order to protect the remaining house from dust and demolition , as well as, provide privacy for us during construction. 

Experience, Experience, Experience and Professionalism, Professionalism, Professionalism are the hallmarks of Art DeRosa and company.  He is a seasoned performer and pretty much seen it all.  Art has such a vast amount of home construction experience in both hi-end and medium end homes that he can draw upon a wealth of knowledge in all construction disciplines to implement a fine finished result.  As a former tool and die maker his penchant for hi-precision finish work yields highest quality appearances to things like moldings; trim; windows; doors; floors; etc. etc. 

This complex renovation project lasted 7 months which was within the initial time estimate given at the beginning and Art DeRosa and team were here every single day, day in and day out,  bright and early during that time frame. He did not start any other projects and stayed on the job day-in and day-out even when other sub-contractors such as plumbers and electricians were on the job site excluding his people from doing any other work. Art DeRosa and team were here every single day until final signoff.

I would not hesitate to recommend Art DeRosa & Co for any planned New House and/or House Renovation of any kind.


"
Additional Photos
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+20

Response time2 days
4 neighbors recently requested a quote
Recommended by100%of homeowners
Classic Home Design & Construction, LLC
5.0(
9
)
Basement - Remodel

Serving Greenlawn, 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 BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)
Basement - Remodel

Serving Greenlawn, 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
Avatar for Jag Construction & Maintenance Inc.
Jag Construction & Maintenance Inc.
5.0(
23
)
Basement - Remodel

Serving Greenlawn, NY and surrounding areas

Approved

In business since 2020

Free estimates

Customers say: True professional

"Walter from Jag construction has done a few projects for us as well as some commercial work at our building to mention a few. We started with our commercial property in Smithtown. He came in and went right to work and the timeline was fantastic. We called him to our home to finish our basement thereafter. I was so impressed I also had him reconfigure our first floor laundry room as well. This year he’s doing a few more projects here! It’s not everyday you find a professional that treats your home like his own and his recommendations are always well planned and precise which to me is greatly appreciated. I can’t say enough good things about this contractor and would have him do any project beyond my scope at either our home or business alike. A++++ Frank and Mary O’Donnell Speonk, NY"
Handymen Project
Handymen Project
Handymen Project
Handymen Project
Additional Photos

+37

4 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Interior Source
Interior Source
4.8(
50
)
Basement - Remodel

Serving Greenlawn, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2001

Free estimates

Warranties offered

"Saeed and his team did a fantastic job with our bedroom remodeling project. Saeed worked closely with us throughout the project, delivered on time and within the original estimate. Saeed’s team were always on time, would clean after they left and did a great job with all the details. I would highly recommend Saeed and team for any remodeling project."
Dr. Arif Kitchen
Remodeling - Kitchen & Bathroom Project
Kitchen and Bath Remodeling Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+30

Response time2 days
Response rate100%
13 neighbors recently requested a quote
Memo's Home Renovations, Inc.
4.9(
153
)
Basement - Remodel

Serving Greenlawn, 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
Recommended by78%of homeowners
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FAQs for basement remodeling projects in Greenlawn, NY

Finishing a basement turns unused square footage into livable space and returns up to 70% of what you spend when you sell your home. Beyond that resale boost, you gain a playroom, home office, or guest suite you can start enjoying right away. That mix of daily comfort and solid return on investment (ROI) makes basement finishing one of the smartest upgrades you can tackle.

In some parts of the country—especially lots on swamps, high water tables, or other wetlands—local codes prohibit basements. Saturated soil puts constant pressure on foundation walls and lets water seep in faster than any sump pump can handle. 

If your property sits on waterlogged ground, building on a slab or crawl space is often safer, more affordable, and code-compliant.

Most basements wrap up in four to eight weeks. Framing takes three to five days, with electrical and plumbing rough-ins following over the next week. Add five days for drywall, two to three for flooring, and another week for paint, trim, and punch-list items. 

Delays can happen if materials run late or your contractor’s calendar is packed, so build in a little cushion when you plan.

Whether a finished basement counts toward your home’s official square footage depends on local rules. Many areas only include below-grade space if it has code-approved egress, fully finished walls, ceilings, and floors, plus consistent heating. 

Check with your local assessor or building department before you start; meeting those standards can affect taxes, appraisals, and resale value.

Building codes require a checklist: dedicated heat and electrical service, a code-approved stairway, and at least one egress window or exterior door. Walls, ceilings, and floors must be fully finished and meet insulation, ventilation, and fire-separation standards. If you add a bedroom, you’ll also need a closet, proper clearances, and safe exits. If you change the layout later, be ready to update the space so every new room still meets today’s code.

The Greenlawn, NY homeowners’ guide to basement remodelings

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