How much do addition contractors typically cost?
- Dover, New Hampshire Average$59,380
- Typical Range$35,000 - $59,380
- Low End - High End$8,200 - $180,000
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Service Pros
AS
"Bob is the BEST! He inspected my roof, made a minor repair, and told me my roof was good for at least another 5 years - no other work needed. He was honest and professional - two valuable characteristics in a professional! I'd recommend him to everyone!"
0CB3155706789B363D519FC044C55BC17FD75AE8DD568BFDFF9DBFFCA8AAC833 C. in August 2025
Biddeford, ME·
Find a Custom Home Builder, Deck or Porch - Build or Replace, Garage - Build , and 2 more
"Kevin is top notch, great work done on time at a reasonable price. I highly recommend him"
62883EA66D32C42636EE0581EF12EB55DD00BC7E8A2953AC541951539FB29633 1. in October 2025
York, ME·
Professional, family owned, detail oriented
"We had 6 different contractors bid on our deck/porch & siding project, and Russell's was a clear standout right from the start. This was a sizeable project for us, and even though Russell's wasn't the cheapest quote we received, project manager Keith did something that completely set them apart: He simply stayed in touch. From start to finish, Keith was communicative, responsive and always made himself available. He listened to us, kept detailed documentation, and made us feel comfortable every step of the way. In just a few short weeks, lead carpenter Todd & his talented team completely transformed our home. Thoughout the process they were friendly, respectful, professional & attentive to every last detail. We are thrilled with the quality of their work, and we couldn't be happier with our decision to work with this company."
Holley C. in December 2022
Custom Cabinets, New Home Builds, Porches and Decks , and 2 more
"We have hired Dogwood for a number of remodeling projects at our home and each time they have done such a great job. We know we are very particular about things and Steve has always taken the time to address any questions or concerns we have had. Dogwoodâ s finished work speaks for itself and we have other projects in mind for them in the future!"
4EAD13B3B5C9E15BD3F1172F3A0CB83F68D9B7DAB1BD2D5895C7F395BC4C840C 8. in February 2024
BC
Dover, NH·
Kitchen Remodels, Room Additiions
"Dana Brunson is not only a craftsman at his trade but he stays on top of new technologies people need in their homes."
Bill R. in January 2020
Dover, NH·
General Contractor, Home Remodeling, Bathrooms , and 1 more
"Dave and Steven did a wonderful job finishing our basement into 3 new areas, an office, workout room, and storage room. They also did a great job with installing our new electric fireplace. Estimates were provided within a day, the job started and finished on time and Dave handled all the subcontractors and inspections with ease. I highly recommend them and they'll be the first ones called when we need additional home improvements."
C63CBC596732C3DBCAF1DF2F868B8CD7EC98742D06CC53D569ED9B5E7E683B9B 3. in November 2025
BC
Barrington, NH·
Exterior Home or Structure - Paint or Stain, Addition to Existing Structure, Bathroom Remodeling
"There are a lot of great things to say about Bill. First of all, he can do ANYTHING. Bill replaced siding, installed new plywood and Tyvec, painted my house and deck, built a new front porch, repaired and built new features on my back deck, eliminated rot, installed new gutters, re-insulated my basement, and even fixed a closet door in my house. He is a perfectionist and will treat your house like it is his own. Our house was in really rough shape before Bill came and now it looks stunning. We get compliments on it all the time. If you want someone that will do the job right, won't cut corners, and is a very nice person to work with - Bill is your guy."
Ryan K. in December 2019
SC
"I recently had my shingle roof replaced and I?m very happy with the results. The team was professional, punctual, and completed the job efficiently. The quality of the work is excellent, and the new roof looks great. They kept the work area clean and communicated well throughout the process. I would definitely recommend them to anyone needing a roof replacement."
01C40F612736BA43A3D69F48BE813B7873B163B03ADDA786326EBB1D80B37326 D. in March 2026
HB
In business since 1986
Dover, NH·
About us: "We are a full service genral contracting company specializing in all aspects of commercial , residential,industrial construction projects from small to large scale.Most work is performed 'in house" as well as utilizing a tight knit group of sub contractors as needed."
Showing 1-9 of 16 results
Costs for related projects in Dover, NH
- Build an Addition$35,000 - $59,380
- Demo an Interior$800 - $2,480
- Remodel or Renovate a House$17,050 - $46,690
Frequently asked questions
- It’s important that you verify their license is still in good standing. Also keep in mind that certain states or provinces don’t require licensing if the job is under a certain dollar amount.
- You can find a list of your state’s licensing requirements on the HomeAdvisor website. Before you get to work with the pro, make sure their qualifications are current and acceptable to you.
- It is always a good idea to get a copy of the pro’s insurance certificate for future records, and in case anything happens. This is a good way to feel more secure in your home project, and to weed out potential scammers.
HomeAdvisor makes it easy to connect with pros near you. You can read reviews, get quotes and book appointments all in one place.
Depending on the type of project, you may find subtle differences in the hiring process. Here’s a look at task-specific advice.
You can use HomeAdvisor to help evaluate a contractor’s qualifications. We put pros through a screening process, and award badges to high-performing contractors. You can find these badges on a pro’s HomeAdvisor profile, and sometimes, his or her website.
Your research doesn’t stop here. Once you’ve found a few prospective companies, make an call to ask a few questions about work history, licensure and more:
- Have you completed a job like this before?
- Do you have a list of references I can contact?
- When are you able to start the job?
In most cases, the responses you get to these three questions will give you a very good idea of the right pro for your project. If you have more than one front-runner, these additional questions can help you narrow it down.
- How many years of experience do you have?
- What’s your permanent business address?
- Are you licensed to work in my area?
- When did you earn your business license?
- How do you handle warranty service complaints?
- Do you have worker’s compensation, property damage and personal liability insurance?
Any good contractor will answer these questions, and most will appreciate dealing with a client that takes such an active interest in finding good service. On the other hand, if a contractor gives you a hard time with these questions, you probably want to find someone else.
Related Projects in Dover, NH
HomeAdvisor Community Rating
Overall Rating:
Dover Addition & Remodeling Contractors are rated 4.5 out of 5 based on 103 reviews of 103 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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