Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Deer Park, NY

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Addition to existing structure builders in Deer Park

Avatar for Greg Home Improvement, Inc.
Greg Home Improvement, Inc.
4.7(
86
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

In business since 1997

Free estimates

Warranties offered

"Greg & his team did a wonderful job on my renovation project, with exceptional marks for honesty and communication. Pricing was fair, and there was always confidence in the work itself: it's clear that Greg brought a tremendous amount of experience to the project, and he consistently ensured that work was done correctly (down to every last detail). I could not ask for a more reliable and honest person to deal with! Additionally, the scope of work changed on our project due to additional requests we had (our decision to re-do walls, install new lights, etc.) yet there was never any worry or concern on unfair pricing. Greg gets five-stars, and we will definitely work together again in the future."
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS
LIVING/DINING/KITCHEN IN PROGRESS

+101

Recommended by96%of homeowners
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

"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 Homecraft Remodeling Corp.
Homecraft Remodeling Corp.
4.5(
87
)
Addition to Existing Structure - Build

Serving Deer Park, 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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+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

"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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+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

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(
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 !"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+26

Response time8 hrs
23 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
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

"cannot recommend this company enough. They very graciously took on my very difficult project after another contractor resigned. I am beyond happy with the result. I know that with this company that the job has been done properly. Robert was able to communicate exactly what was being done, when, and why. The communication was unmatched. I will actually miss their excellent communication, the job was done in a timely manner. More was completed with this company in 2 weeks than 10 months with my previous contractor. Robert was kind and hardworking. I have only positive things to say about Classic Home Design and Construction LLC and I will happily use them again in the future, and I am thankful I was put in touch with such an upstanding company and people behind it."
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 Cocos Custom Building LLC
Cocos Custom Building LLC
4.8(
9
)
Addition to Existing Structure - Build

Serving Deer Park, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Warranties offered

"Cocos was very reliable. Answered my messages/calls in a timely manner. Showed up on time, did good work. Very clean. I would definitely use them again and recommend them to my friends and family."
Exterior Remodel
Modular Set And Exterior Finish Project
Exterior Remodel
Modular Set And Exterior Finish Project
Exterior Remodel

+31

Response time12 hrs
Response rate100%
8 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
...
Showing 1-10 of 599
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.