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Top-Rated Addition and remodeling pros in West Islip - Updated Nov 2026

Avatar for Classic Remodeling Group Inc
Classic Remodeling Group Inc
4.8(
79
)
Bathroom - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 1947

Free estimates

Warranties offered

"​I cannot say enough good things about Classic Remodeling! They recently completed a major project at my house—replacing the siding, fascia, and gutters—and the transformation is absolutely incredible. ​From start to finish, the team was professional, detail-oriented, and efficient. They didn't just fix up the exterior; they made my house look like a completely different home. The curb appeal is amazing now, and the quality of the workmanship is top-notch. If you are looking for an honest, skilled remodeling company that delivers outstanding results, look no further. Thank you, Classic Remodeling, for a job beautifully done!"
34 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Bathroom - RemodelAddition to Existing Structure - BuildAddition to Existing Structure - Build - For Business+9 more

Serving West Islip, NY and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: True professional

"There are not many people in today’s world that really cares about how they are perceived . A true craftsmen is honorable and able to listen. Quality and precise precision make every job memorable . Arthur takes pride in everything he does. You could not find a better construction company , run with complete honesty and quality work. Doesn’t forget his patience and caring for what his customer wants. Hire this amazing company…you will not regret it. Your satisfaction gives him joy in his craftsmanship ?"
Additional Photos
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Additional Photos

+20

Response time2 days
4 neighbors recently requested a quote
Recommended by100%of homeowners
Selective Remodeling
4.2(
56
)
Bathroom - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"I had the kitchen remodeled. The job was completed in 4 weeks. The workers were great. They cleaned up every day. Mike kept me informed of who was coming and when. He responded right away to any questions I had. Everyone was very professional. I will definitely use them again."
Response time2 days
5 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)
Addition to Existing Structure - BuildAddition to Existing Structure - Build - For BusinessBasement - Remodel+10 more

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
Avatar for All Island Additions and Renovations
All Island Additions and Renovations
5.0(
20
)
Addition to Existing Structure - Build

Serving West Islip, NY and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"All Island Additions & Renovations did an amazing job on our dormer project. The whole experience was smooth from start to finish. They were professional, honest, and always on time, and the quality of their work really shows. The new second floor came out beautiful solid, clean, and exactly the way we wanted. It feels like a brand-new home now. I would definitely recommend them to anyone looking for a reliable contractor for dormers, additions, or full renovations."
Before
After
Kitchen remodel
Bathroom remodel
Bathroom remodel

+71

Response time1 day
Response rate100%
Recommended by81%of homeowners
Avatar for DEPENDABLE RENOVATIONS LLC
DEPENDABLE RENOVATIONS LLC
5.0(
25
)
Kitchen - RemodelBasement - RemodelBathroom - Remodel

Serving West Islip, NY and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Dependable Renovations LLC. was a pleasure to deal with. Steve and his staff are knowledgeable, courteous, honest and professional. All work was completed, as discussed and in a timely fashion. What I truly appreciate is the concern for the cleanliness of their work and the respect of their surroundings. That's something you can't teach. I would highly recommend Dependable Renovations for any work consideration."
3 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Jag Construction & Maintenance Inc.
Jag Construction & Maintenance Inc.
5.0(
23
)
Major Renovation - Multiple RoomsBathroom - RemodelBasement - Remodel+1 more

Serving West Islip, 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
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FAQs for addition and remodeling projects in West Islip, NY

The proper sequence of a kitchen installation starts with laying the foundation and structural framework. From there, you need to establish utilities like plumbing, wiring, and gas lines, then install cabinetry and countertops, and finally finish with flooring, painting, tile backsplashes, and lighting. A professional kitchen installation contractor can coordinate each component of your project to minimize the timeline and maximize resources.

The West Islip, NY homeowners’ guide to addition and remodeling services

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