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Top-Rated Addition to existing structure builders in Stony Brook - Updated Nov 2026

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

Serving Stony Brook, NY and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Hector and Moises were excellent! Hector came with one other of their crew and assembled my permanent gazebo. I have stone pavers and they were very careful in cutting them and digging Deep enough to establish a good anchor. They even installed railings for my back stoop. I would highly recommend them! Clean... affordable and professional."
before demo
kitchen demolition
demolition complete
kitchen tile job in progress
kitchen tile

+172

Response time7 hrs
Recommended by76%of homeowners
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Addition to Existing Structure - Build

Serving Stony Brook, 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 Alta Renovations Corp
Alta Renovations Corp
5.0(
30
)
Addition to Existing Structure - Build

Serving Stony Brook, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Warranties offered

"Jose and his crew did an outstanding job on our extensive interior and exterior renovation, which included a new addition. The project covered everything from a new structural roof with shingles and skylights to new construction windows and doors, siding, a Trex deck, and fully renovated kitchen, bathroom, and laundry room. They also refinished a bedroom and installed beautiful hardwood floors. As with any large project, a few unexpected challenges came up, but Jose handled them with professionalism and kept everything moving forward smoothly. His craftsmanship is excellent, and he’s not only easy to work with but also patient and highly skilled at problem-solving. I wouldn’t hesitate to hire Jose again for future projects and highly recommend him to anyone looking for quality work and a reliable contractor."
Additional Photos
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+26

Response time8 hrs
16 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for AR Home Construction LLC
AR Home Construction LLC
5.0(
29
)
Addition to Existing Structure - Build

Serving Stony Brook, NY and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

A.R. Home Construction is a premier design and build construction company specializing in luxury new home construction and high-end remodeling projects. With expertise in all aspects of construction, from conceptual design to final touches, A.R. Home Construction delivers exquisite and luxurious transformations. Our team of skilled professionals is dedicated to exceeding client expectations and creating stunning spaces that reflect unparalleled craftsmanship. Explore luxury and sophistication at our home design showroom, offering a curated selection of top -quality products for your project.

My jobs
My jobs
My jobs
My jobs
My jobs

+73

13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Inson Dubois Wood LLC
Inson Dubois Wood LLC
5.0(
17
)
Addition to Existing Structure - Build

Serving Stony Brook, NY and surrounding areas

Approved

In business since 2005

Customers say: True professional

"Inson worked with us on our home in the Hamptons and house in San Francisco. He brings an extraordinary combination of very high end style personalized for our tastes; access to special deals from the most elite and sought after designers; and a sense of working within the budget you have in mind. We were able to get museum quality pieces for both homes at unbelieveable discounts. Inson also continues to provide important follow up services as needed. For example, we had a fabric issue with our 40 outdoor chairs that developed after the warranty. The cost to change would have been tens of thousands of dollars but the manufacturer handle the out of warranty issue at no cost to us, which I believe was due to inson’s relationship and advocacy on our behalf. He’s terrific."
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+11

Recommended by100%of homeowners
Avatar for A.S.M. Home Improvements
A.S.M. Home Improvements
5.0(
12
)
Addition to Existing Structure - Build

Serving Stony Brook, NY and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"Anthony is the consummate professional. He worked with us to design a porch that not only looks outstanding but adds curb appeal and value to our home we never could have imagined. He is efficient, neat, completely open to last minute "hey we forgot but could you...", incredibly excellent at everything he does (he's also done for us internal painting, fixed floor planks etc) and most important is that he is just the nicest person with whom to work on home projects. Highly recommend."
Remodeling
Remodeling
Remodeling
Remodeling
2 of 2
fire pit

+48

Response time11 hrs
5 neighbors recently requested a quote
Recommended by58%of homeowners
Avatar for Tri Build Construction
Tri Build Construction
4.2(
40
)
Addition to Existing Structure - Build

Serving Stony Brook, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1987

Free estimates

Warranties offered

"I am incredibly thankful to Ray LaManna and Tri Build Construction for my new roof. I had major structural damage to my roof due to improperly installed solar panels. Not only did Tri Build diagnose the leaks before the repair, they fixed it in record time. It was extremely reassuring to know what the cause was and how it would be resolved so that I would not have to worry about my home, my greatest investment. If you have roof damage due to improperly installed solar panels, or if you’re looking for a new roof and need a competent and honest contractor, you need Tri Build Construction, a U.S. Veteran owned company."
Response time1 day
5 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Patzan Home Improvement Inc
Patzan Home Improvement Inc
5.0(
6
)
Addition to Existing Structure - Build

Serving Stony Brook, 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

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

Serving Stony Brook, NY and surrounding areas

Approved

In business since 2010

Free estimates

Customers say: Quick response

"Kenneth from JKL Construction, Inc. did such an amazing job remodeling our kitchen and living room that we hired him again to rip down our old deck and build a brand new one. Once again, he was professional, polite and knowledgeable. He offered ideas how we could put the staircase off to the side and really maximize the space on the deck. His work was beautiful and we couldn?t be happier with the results! We decided to hire him a third time to remodel the front of our house so check out those pictures to see the incredible transformation, as well as the pictures of the gorgeous kitchen he created for us!"
Response time9 hrs
Response rate89%
19 neighbors recently requested a quote
Concorde Remodeling, Inc.
4.2(
48
)
Addition to Existing Structure - Build

Serving Stony Brook, NY and surrounding areas

Approved

In business since 2008

Free estimates

Customers say: Quick response

"5 years ago I put an addition to my house, a relatively large job. I was very pleased with the work Bob's People did. So when I recently decided to remodel my kitchen I didn't hesitate to hire bob again. And once more very pleased ."
New addition
New addition
New addition
Working
New addition

+14

Response time1 day
Response rate100%
Recommended by92%of homeowners
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FAQs for addition to existing structure building service projects in Stony Brook, 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 Stony Brook, 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.