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Top-Rated Addition to existing structure builders in Deer Park - Updated Nov 2026

Avatar for BuildingLI.com - BLI Facilities LLC
BuildingLI.com - BLI Facilities LLC
5.0(
32
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Eddie was great to work with! We had a limited time frame to adhere to town inspections and Eddie and his team knew exactly what we needed and quickly got the job done. The results were great and even the inspector acknowledged the impressive repair. They were able to put a knocked out garage wall back on the foundation and repair the interior dry wall. I would recommend this company for any professional contract work due to their reasonable price, ease to work with and quality of work."
before demo
kitchen demolition
demolition complete
kitchen tile job in progress
kitchen tile

+172

Response time7 hrs
Recommended by76%of homeowners
Avatar for Homecraft Remodeling Corp.
Homecraft Remodeling Corp.
4.5(
88
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 1989

Free estimates

Warranties offered

"Norman helped us to make our Master Bathroom modern and usable. The process was easy, straightforward and relatively quick! Norman's showroom was a great meeting spot to review and talk about design, choose materials and go over any details. He was communicative and helpful in answering any and all questions throughout the process. We are thrilled with our new Master Bath that feels like we are at a hotel or spa. Thank you Norman and team. Highly recommend Homecraft!"
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+43

Response time7 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Addition to Existing Structure - Build

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
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
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"All In One Comfort Solutions has been great to work with. They take their time, approach the issues correctly, and provide great value. I contacted them after feeling uncomfortable with a prior assessment from another company, which turned out to be a great decision. Highly recommended."
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(
30
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"My husband and I are so happy with our new deck. Just in time for the beautiful weather! We have Jose Diaz with Alta renovations corp. to thank for making our home improvement job stress free. He and his crew were extremely prompt, meticulous, courteous and great communicators. Jose made me feel comfortable asking questions and was prompt to respond. It was truly an absolute pleasure working with them from the start to the finish !"
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+26

Response time8 hrs
22 neighbors recently requested a quote
Recommended by80%of homeowners
Memo's Home Renovations, Inc.
4.9(
153
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"Memo and Abby are fantastic. The communication is exceptional in both clarity and attentiveness, and the work quality - from prep to the job itself to clean up - itâ s the tops. I engaged Memo to build/install and paint, finish, and wallpaper a double-sided wall with some mill work and moulding details. For the same room I also engaged him to purchase/hang/install a solid core slab door in an existing doorway. Though not a huge job, as a designer I was really keen to work with someone on the details - and Memo was so easy to do this with and delivered on everything I wanted. I will absolutely be hiring Memo again for more things and bigger jobs."
Response time5 hrs
2 neighbors recently requested a quote
Recommended by78%of homeowners
Classic Home Design & Construction, LLC
5.0(
9
)
Addition to Existing Structure - Build

Serving Deer Park, 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
JMC Services Corporation
5.0(
14
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 2022

Free estimates

Offers commercial services

"Jeff and his crew were amazing! If I could give them 10 stars I would. We needed a bathroom ceiling repair and an exhaust fan installed. Jeff suggested crown molding for around the entire bathroom and it came out gorgeous. Not only are they great at what they do but theyâ re professional, honest and so neat with their work. I was fearing a dusty mess and there was none. If youâ re looking for someone to do anything and everything, this is the company to hire!"
Recommended by64%of homeowners
Avatar for Patzan Home Improvement Inc
Patzan Home Improvement Inc
5.0(
6
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 2008

Emergency services offered

Customers say: True professional

"Giovanni and his crew were very professional and did a wonderful renovation to my garage. Any question or concerns I had were answered to my satisfaction . I would highly recommend them for any work you may have. Mike B"
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+29

5 neighbors recently requested a quote
Recommended by83%of homeowners
JKL Construction, Inc.
4.2(
21
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 2010

Free estimates

Customers say: Quick response

"Kenneth was amazing to say the least! From the moment we first sat down with him for an estimate, he was professional, polite, & extremely knowledgeable, all the way until the completion of the job. We explained to him that we wanted to update our old kitchen & he offered great suggestions of how we could improve & better maximize our space such as taking down the wall separating the kitchen from living room to create an open concept & allow better air flow through the house, move the back door from the right side to the left to get the best use of the longer wall & allowing for more counter space, & suggesting putting in a toe-kick heater to warm the floor when I expressed how my feet are freezing during the winter. He returned w/ a computer model of what our new kitchen would look like & checked in w/us throughout the build. We were so impressed w/our new kitchen/living room that we also hired him to build our deck & remodel the front of our house so check out those pics too! ???"
Response time9 hrs
Response rate89%
15 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Deer Park, 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 Deer Park, 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.