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

Avatar for Horsman Builders
Horsman Builders
4.3(
23
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 1986

Free estimates

Emergency services offered

"When you find a great contractor, don’t let them go. ;). I hired Tim to build a screen porch under my deck but added several projects as I recognized the high quality of work and attention to detail from his crew. In addition to the screen porch, they built a deck extension - so nice that I decided to have them replace the existing deck, installed a basement slider and replaced the door, installed a new fence and built a shed. Tim was responsive, open, honest and receptive of my requests and additions during the project. Great experience working with Tim and his crew: Dan, Brian, Eddie and Ben. Great job on all the work - I’ve received many compliments from neighbors and guests on the work you did! I can’t recommend Tim and his crew enough."
General Remodeling Project
General Remodeling Project
Additional Photos
Additional Photos
Additional Photos

+4

Response time7 hrs
Response rate100%
2 neighbors recently requested a quote
Wagner Home Renovation
4.5(
34
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Asa again was easy to work with. He is professional and honest in his recommendations and was fine if I wanted to go in different direction as long as it maintained the quality of the work. I almost always went with his recommendations though. Other tradesmen have commented on the high quality of his work which meant that potential renters were willing to pay more to live in such a great place!"
Response time4 days
Response rate100%
2 neighbors recently requested a quote
Avatar for Chris Johnson Custom Builder
Chris Johnson Custom Builder
5.0(
9
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 1997

Free estimates

Warranties offered

"It went great. Chris built our custom home exactly to our specifications. We lived out of state for the entire build. Chris maintained open lines of communication with us so that we always knew what was going on. His work is impeccable. His attention to detail resulted in our dream home being exactly what we expected when we hired him. His group of subcontractors were great throughout the entire process. I have not spoken to anyone in the area that has anything but praise for Chris and his work ethic. Chris came highly recommended by a number of people and I would carry on that tradition and recommend Chris Johnson for any construction project from a remodel to building a new home from the ground up. I would certainly use Chris again for any future construction needs."
Donica road
Cappy’s lane York Maine
Donica road
Cappy’s lane York Maine
Donica road

+45

4 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Xcc Pro Builders LLC
Xcc Pro Builders LLC
4.5(
15
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"I’m generally not one to write reviews however when the experience far exceeded my expectations I believe in giving credit where credit is due, especially when it comes to small business owners. When I began the process of getting quotes to build my 2 car detached garage back in March, the most important factors for me in selecting a contractor were price, competence/quality of work, and trustworthiness (not necessarily in that order). Xavi, the owner of Xcc delivered on all three from start to finish. From the original quote which was fully itemized to show every last detail of the build to the final piece of trim installed, Xavi’s commitment to the job and open and honest communication style was exceptional. Xavi is a perfectionist, so if something isn’t 100% he won’t rest until it meets his standards - his crew is fantastic as well. Entering into a project of this size and cost can be a little intimidating given the amount of risk assumed by the homeowner and potential what if scenarios that can play out, ultimately will the builder will do what he says he will in the agreed timeframe? Xcc Builders will because Xavi is man of character who takes great pride in his work and fully understands the impact integrity has on his business’s reputation and long term success."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+78

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

Serving Deerfield, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Warranties offered

"Adam did an excellent job building our garage from the ground up. He was excellent to work with. Not only was he very professional, so were the subcontractors that he hired. Everyone was knowledgeable, helpful and friendly. Our project required that a road be built to accommodate large trucks in the springtime. The project stayed on track and proceeded smoothly. We were never left wondering “what’s next?” Adam has great communication and stayed in touch to make sure we knew what was coming up and when. I would definitely recommend using Magic Frog Carpentry."
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%
10 neighbors recently requested a quote
Avatar for Twin Timber Construction
Twin Timber Construction
5.0(
8
)
Addition to Existing Structure - Build

Serving Deerfield, 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
11 neighbors recently requested a quote
Avatar for Edgewood Drywall Services
Edgewood Drywall Services
4.8(
42
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 2000

Free estimates

Customers say: True professional

Edgewood Drywall Services invites you to experience a tradition of customer satisfaction that will exceed your greatest expectations. Our professionalism and quality workmanship will accurately reflect your taste and lifestyle. From conception to completion, we work with you until the job is done. Give us a call for a free estimate!

Projects
Projects
Projects
Projects
Projects

+20

2 neighbors recently requested a quote
Recommended by58%of homeowners
Avatar for Top End Builders
Top End Builders
5.0(
5
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

50+ years Combined Exp At Top End Builders, We Specialize in all Residential Building and Remodeling such as, Garage Builds, Custom Deck Builds, Room Additions, Basement Remodeling and more.. We take pride in delivering exceptional craftsmanship, reliable service, and attention to detail on every job. Whether you're looking to expand your space, enhance your property, or bring a custom project to life, we're committed to providing quality results that last. Customer satisfaction is our priority, and we work hard to make every project a great experience from start to finish. Contact Top End Builders today to get started!

2 Story Garage Build
2 Story Garage Build
2 Story Garage Build
2 Story Garage Build
2 Story Garage Build

+79

25 neighbors recently requested a quote
B.G. Construction
4.2(
29
)
Addition to Existing Structure - Build

Serving Deerfield, NH and surrounding areas

Approved

In business since 1987

Free estimates

Customers say: Quality work

"Bill is great to work with. He does everything. We actually asked him to give us an estimate on a paint job to do next spring, but while he was here, he pointed out problems with part of our roof, plus trouble with gutters that were funneling water to siding that was rotted. Itâ s all fixed and we are looking forward to working with him in the spring. It was all more expensive that we expected, but I think we got good value for our money."
Response time1 day
Recommended by90%of homeowners
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FAQs for addition to existing structure building service projects in Deerfield, 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 Deerfield, 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.