How much do addition contractors typically cost?
- Rochester, New Hampshire Average$59,380
- Typical Range$23,260 - $59,380
- Low End - High End$8,200 - $180,000
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Get Quotes NowAddition Contractors in Rochester, NH
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Service Pros
AS
"First of all absolutely a 5 star company! Works my with Beau and his was easy and the results excised our expectations! They are efficient friendly timely and most important professional! I would considering hiring them for your next project!! â ︠â ︠â ︠â ︠â ï¸Â"
75B8A8F0CD52D4B0CC3980BF742A1E30FA15CAF88894F1017130A2F000C3D78E 0. in May 2024
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
Alton, NH·
bathroom remodel, basement remodel
"Very friendly, prompt, getting the job done in a timely matter. Very pleased with the work they did ."
Sue C. in April 2023
Custom Cabinets, New Home Builds, Porches and Decks , and 2 more
"I would highly recommend Dogwood Builders. They are professionals from the beginning to the end of a project. You can count on them to get the job done with expertise."
DC92AEE2EE668A6A065CC5015BE63AC6CE62FBE109A1FB138640D46A3ECD934B 6. in February 2024
North Waterboro, ME·
Custom Home Builds, Decks, Major Renovations , and 2 more
"Dan from DJ Beaulieu Construction did an exceptional job on multiple projects at our home, including building a bonus room above our garage with two dormers, adding a beautiful sunroom and refreshing our front entry. The entryway upgrade included replacing wood decking with composite, installing new vinyl siding, and retiming our front door which significantly enhanced our home’s curb appeal. Dan was professional, reliable, and detailed oriented throughout every phase of the work. The craftsmanship and overall quality exceeded our expectations and each project blends seamlessly with the existing house. We would highly recommend Dan for any construction or home improvement projects"
AE5D76C35D733860DBF5283868F5AA19DAF827133EA20CC591C0D1DDDB923639 4. in June 2026
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
Washington, NH·
Roofing, Additions, Decks , and 1 more
"Bruce is always honest and very fairly priced. Stays true with the estamint I hired him for tree felling and 2 new deck builds on the front and back of my house. I couldn't imagine having another carpenter do work on my house. He makes himself available and keeps you updated on what ever project he's doing. 100% recommend BMC Builders! You won't be disappointed!"
Tara S. in October 2022
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 Rochester, NH
- Build an Addition$23,260 - $59,380
- Demo an Interior$0 - $4,750
- Remodel or Renovate a House$12,500 - $44,615
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 Rochester, NH
HomeAdvisor Community Rating
Overall Rating:
Rochester Addition & Remodeling Contractors are rated 4.4 out of 5 based on 92 reviews of 92 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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