Top-rated addition to existing structure builders.

Get matched with top addition to existing structure builders in Dover, NH

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

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

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

Serving Dover, 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 Dover, NH and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Great! The quality of his work is excellent. He is easy to work with and is very honest. He showed ingenuity in figuring out how to add a shower to a small powder room. This work was done over a year ago and both bathrooms continue to be a joy to use!"
Response time4 days
Response rate100%
2 neighbors recently requested a quote
Avatar for H. Hedges Home Improvements
H. Hedges Home Improvements
5.0(
46
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

In business since 2018

Free estimates

Warranties offered

"I hired Kevin Martin (H. Hedges Home Improvement) to build a new deck, replace a bathroom floor, and repair kitchen cabinetry. Kevin's quote was very competitive and fair. He and his crew showed up exactly when they said they would. He was very collaborative and his communication throughout the project was excellent. It is clear that he wants his customers to be happy at the end of the day. Our HOA also hired Kevin to replace fencing for a 14 unit association and build a new enclosure for a dumpster. Again, his bids were fair and competitive and he performed quality work. I would not hesitate to recommend him."
Company Logo
First Floor Bath Remodel
First Floor Bath Remodel
First Floor Bath Remodel
First Floor Bath Remodel

+90

Response time40 mins
Response rate100%
6 neighbors recently requested a quote
Aubrey & Son Home Improvement
5.0(
38
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Credit card accepted

"Aubrey & Son Home Improvement came to install flooring, framed and installed interior French doors. The attention to detail, professionalism, friendliness and the fact they left with the areas spotless was greatly appreciated and they did an outstanding job though and through. I will be calling them again in the near future for other repairs!"
Response time2 days
4 neighbors recently requested a quote
Recommended by45%of homeowners
Avatar for Chris Johnson Custom Builder
Chris Johnson Custom Builder
5.0(
9
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

In business since 1997

Free estimates

Warranties offered

"Chris did a great job with our remodel. He created a 4 season room, and remodeled a kitchen and bathroom and added built-ins to our mudroom. He made sure he understood what we wanted and was clear about timelines and cost. Would not hesitate to reach out to Chris again for work."
Donica road
Cappy’s lane York Maine
Donica road
Cappy’s lane York Maine
Donica road

+45

3 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for True North Contracting
True North Contracting
4.4(
96
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

In business since 2005

Free estimates

Small jobs welcome

"Nice family business. Had some trouble with some employees getting started but Costas and his dad always took over and made sure everything was great. They did most of the work themselves which was important to me that someone was always on site. My schedule is crazy. Iâ m often not home and I trusted them to be here and get the job done without my oversight. We ran into some challenges, even added a few more jobs to the project. He took in stride, eager for the work and honest and upfront about what he could do what needed to be done? I enjoyed working with him, so Iâ m giving him another project"
Roof
Kitchen Reno
Finish
Ready for Grout
 Finished

+66

Response time7 hrs
13 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Magic Frog Carpentry & Woodworks
Magic Frog Carpentry & Woodworks
5.0(
11
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Warranties offered

"Adam, the owner of Magic Frog Carpentry & Woodworks is great to work with. He is responsive via text and phone conversations. He has a lot of skilled people he works with and does a lot of the work as well. When any hiccup comes up he is quick to get it resolved. This past fall I hired him to do a partial remodel of my kitchen (new countertop, new backsplash, new flooring and painting. I was happy with the work and decided to hire Adam again for a tub to shower conversion. I am really happy with the results of both projects. I plan on reaching out to Adam for the next home project."
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 The Hurlburt Group, LLC
The Hurlburt Group, LLC
4.4(
35
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

In business since 2007

Free estimates

Small jobs welcome

"Outstanding. This company is extremely professional and very easy to work with. I am very fortunate to have had Dave and his crew doing work in my home. I can't say enough. They deserve more than five stars."
basement subfloor
garage door
new beam header
garage door
closet

+77

Response time3 days
Response rate88%
16 neighbors recently requested a quote
Avatar for Live Free Remodeling LLC
Live Free Remodeling LLC
5.0(
12
)
Addition to Existing Structure - Build

Serving Dover, NH and surrounding areas

Approved

In business since 2025

Credit card accepted

Offers commercial services

We pride ourselves on our extreme professionalism and attention to detail. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today, and we look forward to working with you!

Man Cave
Man Cave
Man Cave
Man Cave
Man Cave

+11

16 neighbors recently requested a quote
...
Showing 1-10 of 178
FAQs for addition to existing structure building service projects in Dover, 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 Dover, 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.