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Find Addition to existing structure builders in Commack

Avatar for BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)

Serving Commack, 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 Stars and Stripes Home Improvement LLC
Stars and Stripes Home Improvement LLC
4.8(
313
)

Serving Commack, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"Bobby and David provided great customer service, high quality work and excellent pricing. For my new kitchen, I had an interior wall removed (they brought in a structural pro to check for safety) , moved plumbing and added electrical. The entire kitchen was gutted and redone. They helped me with all my flooring and cabinet selections- they really know what works best! All my phone calls to them were returned very quickly. I highly recommend them and plan to call them back for more work!"
Remodeling - Kitchen & Bathroom Project
VEGA KITCHEN
Painting - Interior Project
Complete Renovation
Basement

+699

Response time3 days
8 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Northgate Home Improvement Corp.
Northgate Home Improvement Corp.
4.9(
93
)

Serving Commack, NY and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"We had Northgate renovate our basement this summer. They did a wonderful job and our experience has been a very positive one! Jeff and his crew were very responsive and sensitive to what I wanted the space to become. They checked in with me daily on the progress and on any adjustments that needed to be made. They kept the job site clean, showed up on time and stuck to the construction schedule agreed upon in the beginning. Not to mention Jeff helped me with some additional items not in his scope of work without charging us extra. It's been a great pleasure to have worked with Northgate to make our basement into a wonderful space for our family. I highly recommend them to anyone looking to renovate their home. We will definitely use Jeff again on our next projects."
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+56

Response time7 hrs
2 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Homecraft Remodeling Corp.
Homecraft Remodeling Corp.
4.5(
87
)

Serving Commack, NY and surrounding areas

Approved

In business since 1989

Free estimates

Warranties offered

"From demo to finish 1 week. Very talented crew. Plumbers, electricians, tile and carpenters were excellent. Very very pleased. Feel so lucky we chose Norman, and John to work with."
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+43

Response time7 hrs
4 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)

Serving Commack, NY and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: True professional

"Artie & Mike are simply the best. I used them to: 1) Build a LARGE extension to my house and redo my entire kitchen and dining room. The job was completed on time and on budget. Throughout the process Artie was transparent & professional. EVERY person who has stepped into my house has complimented at the detailed perfection. 3) Artie built us a custom walk in pantry 2) Built 2 large decks in the backyard as well as an outdoor shower. This project was completed on time, on budget while exceeding all expectations. If you are looking for a contractor and crew that is responsible, responsive, polite, creative and delivers the HIGHEST LEVEL of quality - Artie is the one."
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+20

Response time2 days
4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for All Island Additions and Renovations
All Island Additions and Renovations
5.0(
20
)

Serving Commack, NY and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"I had my second floor dormer done by All Island Additions and Renovations, and they did an amazing job. The work was clean, professional, and done the right way. I?m really happy with the results and would absolutely recommend them to anyone looking to build a dormer or renovate their home. Wil was professional , explain everything clearly, and made whole process really comfortable."
Before
After
Kitchen remodel
Bathroom remodel
Bathroom remodel

+71

Response time1 day
Response rate100%
Recommended by81%of homeowners
Avatar for Alta Renovations Corp
Alta Renovations Corp
5.0(
26
)

Serving Commack, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"Excellent! Alta Renovations did my bathroom from the studs out. Tile, sheetrock, floor, vanity and the plumbing and towel hardware. The job was was in a co-op, with very frustrating "rules" and "requirements ". Most contractors would not want to participate (paperwork, time schedules and parking restrictions). Jose, the owner of Alta, abided by all the rules, whiles still keeping a smile!!! His workers worked neatly and orderly, knew exactly what had to be done, and did it. Very pleased. I'm recommending him to all my ? ? ? ? ?"
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+26

Response time8 hrs
8 neighbors recently requested a quote
Recommended by92%of homeowners
Memo's Home Renovations, Inc.
4.9(
149
)

Serving Commack, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Memo was great. They finished the job faster than expected while still maintaining high quality work. They were able to create an additional bedroom from largely wasted space. They were clean in their work leaving no mess behind. I’m very happy with the work and will use the company for future projects."
Response time5 hrs
Recommended by80%of homeowners
Avatar for Cocos Custom Building LLC
Cocos Custom Building LLC
4.8(
8
)

Serving Commack, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Warranties offered

"We hired Coco’s Custom Building on 2 separate occasions. We needed our roof redone and later decided to hire them to replace a dozen windows in our home. The owner Keith provided us with a great quote each time and was able to schedule the work right away. Any questions or concerns I had were addressed immediately which made the renovation go smoothly. I would definitely recommend Coco’s Custom Building and look forward to using them with my future home renovations."
Exterior Remodel
Modular Set And Exterior Finish Project
Exterior Remodel
Modular Set And Exterior Finish Project
Exterior Remodel

+31

Response time12 hrs
20 neighbors recently requested a quote
Recommended by100%of homeowners
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FAQs for addition to existing structure building service projects in Commack, NY

You can typically raise your roof by four to eight feet, depending on your home's structure and roof design. The exact amount depends on factors like roof slope and framing support. Raising the roof creates additional interior space, enhances natural light, and increases your home's value. Consult a professional to determine the feasible height increase for your home.

Yes, you need a building permit to raise your roof. Obtaining a building permit ensures your project complies with local building codes and safety regulations. A professional contractor can assist with the permit and inspection process and ensure all legal and safety requirements are met. Your contractor will be familiar with building codes in your area, which can differ between cities or states.

While it's possible to raise a flat roof, it requires extensive structural modifications. Flat roofs lack the attic space and support structures of pitched roofs, so raising them involves significant engineering to ensure safety and durability. This process can be complex and costly, so professional assessment is essential before undertaking a project of this magnitude.

The Commack, NY homeowners’ guide to addition to existing structure building services

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