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

Avatar for Rea Professional Construction INC
Rea Professional Construction INC
5.0(
24
)
Addition to Existing Structure - Build

Serving Sagaponack, NY and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Jaime and his crew were wonderful to work with. They stuck to the end of the job until every single item on the check list was done. This I find rare in the construction business. They were courteous and mindful of schedule. I recommend Rea Construction to anyone looking for quality work."
Before
Before
Bathroom Renovation
After
After

+223

Response time6 days
Recommended by100%of homeowners
Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Addition to Existing Structure - Build

Serving Sagaponack, 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."
Additional Photos
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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 Sagaponack, 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
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Additional Photos

+26

Response time8 hrs
22 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for A-Frame Construction LLC
A-Frame Construction LLC
4.7(
14
)
Addition to Existing Structure - Build

Serving Sagaponack, NY and surrounding areas

Approved

In business since 2023

Free estimates

Small jobs welcome

"A Frame (Billy) responded immediately to my requests and took careful measurements I needed a new screen door plus platform/landing and staircase to an existing deck. Excellent workmanship !!!! Cleanup was done thoroughly Would hire again and highly recommend this company. Thanks for a job well done"
Hampton Bays Interior job
Hampton Bays Interior job
Hampton Bays Interior job
Hampton Bays Interior job
Medford Deck

+112

Response time4 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Agate & Co. Builders
Agate & Co. Builders
5.0(
13
)
Addition to Existing Structure - Build

Serving Sagaponack, NY and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Excellent job. Showed up on time and did a nice clean up after. This job was to replace a hole in the ceiling with sheetrock and painting. Very good work; I can't even see where he patched it, so smooth. I will definitely use James Agate Contracting again."
Sag Harbor Re-Build
Sag Harbor Re-Build
Sag Harbor Re-Build
Sag Harbor Re-Build
Sag Harbor Re-Build

+40

Response time2 days
12 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Two Stories Building Co
Two Stories Building Co
4.4(
8
)
Addition to Existing Structure - Build

Serving Sagaponack, NY and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"If there were a way to ADD Stars to the Review, I would!!! It is Very Rare in Today's Times to locate a Contractor with a Superb Work Ethic. This is one of those Rare Times. 10 Stars Go to Two Stories Woodworking for their Excellent Work Performed on a Timely and Professional Manner. Beautiful Workmanship. Thank-You!"
Arch
Arch Progress
28' Arch
Front Door
Crown and Casing

+48

Response time5 hrs
5 neighbors recently requested a quote
Recommended by33%of homeowners
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FAQs for addition to existing structure building service projects in Sagaponack, 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 Sagaponack, 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.