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

Avatar for Fine Designs by US Home Remodeling
Fine Designs by US Home Remodeling
5.0(
32
)
Addition to Existing Structure - Build

Serving Hempstead, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Free estimates

Emergency services offered

"Fine Design did a great job on our bathroom from the gutting to the finish. Dave and Lenny were easy to work with and the workers were great! Cleaned everything up each day and were very polite. The quality of the work is outstanding. Everyone was very professional and was a much more pleasant experience compared to other contractors I have used. Thanks again-I highly recommend Fine Design."
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project
Remodeling - Kitchen & Bathroom Project

+149

Response time1 day
4 neighbors recently requested a quote
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 Hempstead, 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 All Island Additions and Renovations
All Island Additions and Renovations
5.0(
20
)
Addition to Existing Structure - Build

Serving Hempstead, NY and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"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 Inson Dubois Wood LLC
Inson Dubois Wood LLC
5.0(
17
)
Addition to Existing Structure - Build

Serving Hempstead, 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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+11

Recommended by100%of homeowners
Avatar for Homes & Beyond, Inc.
Homes & Beyond, Inc.
4.8(
20
)
Addition to Existing Structure - Build

Serving Hempstead, NY and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Highly highly recommend Homes & Beyond….Miguel is a true professional from start to finish, communication was at 100% all the way throughout the project, I’ll be hiring them for other projects I have….and cannot say enough about his crew, polite, knowledgeable and kept my home so clean after every day til end of project!!!….they totally exceeded my expectations!!!!"
Kitchen
Kitchen
Kitchen
Kitchen open layout
Kitchen open layout

+50

Response time6 hrs
Response rate100%
5 neighbors recently requested a quote
Avatar for Powers Performance Construction LLC
Powers Performance Construction LLC
4.3(
27
)
Addition to Existing Structure - Build

Serving Hempstead, NY and surrounding areas

Approved

In business since 2000

Free estimates

Emergency services offered

"They did an excellent job in our bathroom. Reasonable, professional and quality of work was amazing. I highly recommend this company. I would hire them again. Kept us informed along the way to ensure we got exactly what we wanted. Started job in time and finished in time. Amazing company and very pleasant to work with."
Decks and Porches Project
Remodeling - General Project
General Remodeling Project
Finished Carpentry and Woodworking Project
Gazebo

+53

Response time2 days
Response rate100%
4 neighbors recently requested a quote
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FAQs for addition to existing structure building service projects in Hempstead, 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 Hempstead, 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.