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Find Addition to existing structure builders in East-derry

Avatar for Norman Builders
Norman Builders
4.8(
86
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

"Finding a builder who can take your idea (aka Dream) and make it a reality is not easy. Norman Builders created a house for me that exceeded my expectations. Ryan Norman provided me direction before the existing house demolition started. He connected me with others needed for pre-build items. Norman Builders then built exactly what was designed on paper. What sets Norman Builders apart from others is their communication and commitment to understanding what the customer wants. Ryan and his assistant Collin were always available and communicated at every milestone along the way. There was never a time I did not know what was going on or what I needed to decide. The contractors they use are highly professional and care about their part of the build. I love my new house! I highly recommend them and appreciate all Ryan and his team did for me."
New Kitchen
New Master Bathroom
Exterior Under Construction
The Addition from the Exterior
2nd Floor Master Bathroom

+53

5 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Benchmark Home Improvements
Benchmark Home Improvements
4.8(
143
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 1997

Free estimates

Warranties offered

"Benchmark Home Improvements changed the way our home looks, our new beautiful kitchen has been simply an amazing transformation. Lee has been a great help in designing our new kitchen and together with his team they did a wonderful job building the kitchen to that design. They went way beyond their contractual obligations to accommodate our requests. We would wholeheartedly recommend Benchmark Home Improvement for any of your home improvement projects"
Green Building ECO-CERTIF
Green Building ECO-CERTIF
Green Building ECO-CERTIF
Green Building ECO-CERTIF
Green Building ECO-CERTIF

+407

Response time2 days
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Handy and Some
Handy and Some
4.6(
35
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2014

Free estimates

Warranties offered

"Sean and his crew are truly Professionals within this Industry. Courteous, Friendly, Responsive and produce Excellent Quality Workmanship. By far, Sean and his crew are the best I have ever had the opportunity to hire for a major construction project that resulted in a comfort level knowing that everything was being handled properly. Construction is a challenging venture when putting on an Addition to an existing dwelling. There are many obstacles and challenges that can be faced throughout the project and within the home. Sean and his Team went over and above and addressed each challenge professionally and with timely resolution. I couldn't ask for any better service and results! The addition came out beautiful, I have an awesome Garage and my Wife is ecstatic with her new Mud Room and Pantry! I would recommend Hand and Some for any project that you may need."
Atkinson kitchen remodel
Atkinson kitchen remodel
Atkinson kitchen remodel
Atkinson kitchen remodel
Atkinson kitchen remodel

+139

Response time2 days
1 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Xcc Pro Builders LLC
Xcc Pro Builders LLC
4.5(
15
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Xavier and his team were excellent to work with. No BS on the quote, permit, plans, etc....They showed up on the day they said they would and even helped me take my grills off the existing deck before tearing down (they put it back up at the end too!). The inspector that came out even inspected on how well built the deck was. XCC built us a beautiful trex deck that our family will be able to enjoy for years. Thank you Xavier and team!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+78

Response time4 days
3 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Magic Frog Carpentry & Woodworks
Magic Frog Carpentry & Woodworks
5.0(
11
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Warranties offered

"Very professional. Timely responses with any questions or concerns I had. Was very accommodating when changes or additional work was requested for the project. Would highly recommend for any household projects."
High Ceilings. Inside 45 degree angles done with NO-Coat 450
Tall Foyer. Wrapped beam. Unfinished at post.
Outside corners with bead. Outside 45 degree angles with No-Coat 450.
Deep Skylights with drywall returns.
Before

+11

Response time1 day
Response rate100%
9 neighbors recently requested a quote
Avatar for Twin Timber Construction
Twin Timber Construction
5.0(
8
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 2025

Free estimates

Offers commercial services

"Michael built a single family home in Laconia and his work was thoughtful, tasteful, and overall very well done. He was very responsive and quick to make any requested adjustments. I highly recommend Michael and his team for any renovations, improvements or building a home from start to finish!"
Laconia Custom Home
Laconia Custom Home
Laconia Custom Home
1 neighbors recently requested a quote
Avatar for Prime Developments
Prime Developments
5.0(
5
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

Whether you are looking to build a custom home from the ground up or expand your current space with an addition, Prime Developments specializes in bringing your unique vision to life. As a leading custom home builder, we design and craft stunning custom homes and high-quality new construction homes tailored to your lifestyle. We focus on budget-friendly new homes as well as high-end luxury custom homes. If you aim to maximize your property’s value and footprint, we also excel in seamless additions to existing homes, custom garages, and in designing modern accessory dwelling units (ADUs). From concept to completion, we combine premium craftsmanship with smart design to create spaces you’ll love for a lifetime.

Project Photos
Project Photos
Project Photos
Project Photos
Project Photos

+2

1 neighbors recently requested a quote
O'Sullivan Construction and Property Management
4.3(
12
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

"We hired this company to remove old exterior window shutters and install new exterior window shutters. They were extremely responsive, prompt, friendly, reliable, and very professional. They were very easy to work with. We would absolutely recommend them without hesitation. We plan to hire them again for future projects."
Small back deck for grilling w french doors and sl
Before
Detail
Porch Swing and Fans
Complete

+70

Response time2 days
22 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Freedom Framing and More, LLC
Freedom Framing and More, LLC
4.3(
14
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"The project is underway and will be completed on time. Mathew is very personable and easy to work with. He has kept me informed about every step thus far. I’m looking forward to having our new space completed and ready to use."
Before
During
Wrapping up
Finished
Prep

+34

Response time2 days
Response rate95%
Recommended by84%of homeowners
Avatar for D.A. Kinsella Company
D.A. Kinsella Company
3.6(
52
)
Addition to Existing Structure - Build

Serving East-derry, NH and surrounding areas

Approved

In business since 1990

Free estimates

Small jobs welcome

"We had the pleasure of working with D. A. Kinsella Company to develop concept designs for a new home addition. Their architectural team was quick, professional, and came up with many detailed ideas to help ensure that we were happy with the design. David successfully coordinated with the city to determine project requirements early in the design phase, which was very helpful and saved us valuable time and effort. We highly recommend David to any homeowner considering a home redesign or new addition...!"
Response time4 days
Response rate89%
20 neighbors recently requested a quote
...
Showing 1-10 of 245
FAQs for addition to existing structure building service projects in East-derry, NH

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 East-derry, NH 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.