Portsmouth, NH178 Home Addition Contractors near you

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Portsmouth Home Addition Contractors

Browse these home addition contractors with great ratings from Thumbtack customers in Portsmouth.

Top Pro
OSA Home Improvement
4.9
from 96 reviews
  • 122 hires on Thumbtack
  • Top Pro on Thumbtack
Brett G.
Verified review

Everything you could ask for and more! I usually never write reviews, but when it comes to hiring people and it companies to do work I felt important to share. We all know how difficult it is to find a good contractor. Elsayed came out on a Sunday and worked tirelessly until the job was done. Installed 3 toilets, dishwasher, garbage disposal, 2 faucet fixtures. Also corrected numerous plumbing issues in the process. From start to finish he let me know what was going on every step of the way. His recommendations were spot on as he came across other issues throughout the project. I always felt confident everything would get done right and did it ever! Never strayed from the up front and honest pricing. I’ve already rehired Elsayed to do more work in my home as OSA is a full service general contractor. Hire with absolute confidence!!!

James Donovan
4.4
from 103 reviews
  • 18 years in business
  • 137 hires on Thumbtack
Becca K.
Verified review

Very professional! Did a great job!! Kept his word on starting and finishing work which is key as we have had so many contractors in the past that haven't. Looking forward to working with him again.

Kearley Masonry
4.5
from 80 reviews
  • 8 years in business
  • 100 hires on Thumbtack
Paul Z.
Verified review

Simply excellent. Trustworthy, most knowledgeable, and honest! He is the man doing the work and takes professional account for everything he does (not an interim jack rabbit). We first hired Steve to extend our chimney by 10 feet for an upward home addition under way. He perfectly matched the brick and mortar to our antique home original appearance. We then had Steve bring the fire place up to code by removing the old fire brick (brick where the heat is most hot at the fire cabinet), and extend then extend antique brick to the ceiling in the living room - on the first floor. What a beautiful job! Antique wood beam mantle and so on. It looks original to this house!

  • 47 years in business
  • 81 hires on Thumbtack
Jenny P.
Verified review

Great job asseming irena for my new home.

Top Pro
G&P Home Solutions
4.7
from 62 reviews
  • 6 years in business
  • 96 hires on Thumbtack
  • Top Pro on Thumbtack
Martha B.
Verified review

I wanted a 12' x 14' sun room built over my existing deck that has a southwestern exposure with no shade (an extremely hot location). The existing family room with a cathedral ceiling features a five-foot wide half round window sitting above a triple sliding glass door that led to the old deck. My new sun room would also require a cathedral ceiling for the addition, and few builders were interested in tackling the challenge for that small area, especially since I had no blueprints to start with. But Patrick Harvey of G&P Home Solutions confidently took on the task and did a wonderful job, as shown in the attached photos. Pat is a very creative and imaginative builder, and my sun room is absolutely beautiful. Now my family room is considerably cooler this summer, while the sun room will provide solar warmth in the winter months. I am very pleased with the results.

  • 18 years in business
  • 62 hires on Thumbtack
Drew R.
Verified review

Dave was outstanding! As I told him, my parents have had work done at their house multiple times in the 25 or so years a they have lived there but I've never once seen a contractor like Dave! He was fast efficient and friendly! He called me to check in about his appointments, showed up on time (or early), did great work and was clean about it! As if that wasn't enough, when I needed my stove fixed he came as soon as he could, emergency status, knowing that I had no way to cook without it, showing up after a full day's work, late at night to get it done and then promptly scheduled when he could come back to get the bulk of the work done. He even remembered my bf's name on the way out telling me to make sure I said "hello" for him. I couldn't recommend any one more whole heartedly! A true professional!

Top Pro
  • 10 years in business
  • 28 hires on Thumbtack
  • Top Pro on Thumbtack
Gunnar A.
Verified review

I have worked with several contractors in the states of California, New York, and Massachusetts. I will rarely take the time to write a review, but when I come across a company that is exceptional I will take a moment to provide feedback. Steve and his team recently repaired my leaking roof in Cambridge, MA. Every single interaction I had with Steve was superb. I have never received such a thorough and professional proposal - this was very refreshing! Steve and his crew were able to get the work done in a timely manner before the next snowfall. I highly recommend Steve and team! He will be my go-to contractor from now on. /Gunnar (Cambridge, MA)

Top Pro
Speranza & Son
5.0
from 34 reviews
  • 14 years in business
  • 49 hires on Thumbtack
  • Top Pro on Thumbtack
Judy A.
Verified review

Joe and his assistant Frank did a great job on replacing two window casings and sills at my mom's home. They arrived on time as well, which I find isn't always the case with contractors. When it came time to reinstall the storm windows they ran into a technicality but they knew how to troubleshoot the issue in order to make the correction. I think anyone who hires Joe & Frank to do carpentry work will be 100% satisfied!

Top Pro
Mark Dubois Custom Carpentry
4.9
from 30 reviews
  • 16 years in business
  • 32 hires on Thumbtack
  • Top Pro on Thumbtack
PAUL D.
Verified review

Mark and his partner did a great job with my staircase. I am very happy with the results. Mark is very good at what he does. I appreciated his prompt replies to my texts when I had questions about the project. This was a 2 day project and I left them in my home for the first day while I was at work and I felt completely relaxed with them being here without me. They cleaned my home after they were done. I would highly recommend Mark for all your carpentry needs. Thank you Mark. I'm so happy I chose you to do this job.

Pino Construction
4.7
from 30 reviews
  • 33 years in business
  • 38 hires on Thumbtack
Maria C.
Verified review

Had my kitchen and bathroom done over. Pino construction workers were very professional, di an outstanding job and actually cleaned up after themselves, which was very surprising compared to other contractors I had in my house. I would highly recommend them for any type of construction or remodeling.

Handy and Some llc
4.7
from 27 reviews
  • 34 hires on Thumbtack
Keri F.
Verified review

We have used Handy and Some for several projects around the house including a partial remodel of a bathroom. Sean has always been wonderful about communicating: whether it's returning phone call or emails, setting project expectations ( how long/ reasonable cost expectations). I've had several contractors before show up for a day then disappear for a week ... Without much explanation (I understand things happen or an emergency job pops up. Just communicate). We never had that problem with Handy and Some! His workmanship is great. We will definitely be using him again for future projects.

Top Pro
HD Construction
5.0
from 25 reviews
  • 32 hires on Thumbtack
  • Top Pro on Thumbtack
Jose G.
Verified review

Work was done on time. Project was done with high-quality materials . I tryed contractors on the past and this one seems to be the best one I ever had

Top Pro
Richardson Carpentry
4.8
from 26 reviews
  • 23 years in business
  • 53 hires on Thumbtack
  • Top Pro on Thumbtack
Emily C.
Verified review

We hired Russell to build a new newel post for our stairwell and install a new railing and spindles. We had sawed off the old newel post during a home construction project a year ago and did not have a picture or materials from the prior post. Russell was able to create a beautiful newel post from scratch which looks better than anything we could have bought in store. He was also committed to ensuring that the style of the post, railing, and spindles matched with our house. At our request, Russell returned to adjust something according to our wishes and even made suggestions to make the whole thing look even better. Russell was professional, honest, and came in at a great price. We appreciated his patience and willingness to deliver a product that we loved. We enjoyed working with Russell and love our new stair railing and hope to use him for future house projects!

Top Pro
Construction Tech
4.7
from 26 reviews
  • 10 years in business
  • 49 hires on Thumbtack
  • Top Pro on Thumbtack
Ben W.
Verified review

My initial contact with Northeast Construction was great, they sent a very professional response and sent out some one (Ian?) the next day to make the repairs to walls and touch it up. Brandon also came out to check on the job and also provided a estimate on some bathroom work we would like to do. After speaking with him we could tell he has extensive experience and knows what he is talking about. We had no idea we couldn't install Sheetrock of any type in a shower behind tile, we had numerous contractors say that was perfectly fine and the norm, after researching its is not the norm. We look forward to working with them on our bathroom job and future projects.

Eagle7 construction inc
4.0
from 26 reviews
  • 16 years in business
  • 27 hires on Thumbtack
Linda V.
Verified review

Adonias was very easy to work with. He is friendly, creative, and flexible. He has a very busy company, so sometimes my projects took longer than expected, but he is good about communicating. Eagle7 remodeled two bathrooms for me (I will upload pictures after I finish cleaning and organizing them). They took out two fiberglass shower/tub units, built a new tub with tile surround and a tiled walk-in shower with glass door. They replaced sinks and countertops, replaced flooring (tile in one, vinyl plank in the other), repaired some plumbing, replaced fan/light combos, and built out walls where needed. In addition, Adonias and his crew helped with a few extra requests as they came up, without complaint. We were updating most of our house this month, so there were many contractors in and out, a dog, kids, and general chaos. The crew took it all in stride, they were patient and worked around our schedule. Prices were very reasonable, and they worked with me to think through what could be salvaged/reused to minimize costs. Adonias also sourced materials as needed, not overbuying or upcharging. Highly recommend Eagle7.

Top Pro
rainstone construction inc
4.9
from 19 reviews
  • 12 hires on Thumbtack
  • Top Pro on Thumbtack
Max W.
Verified review

Excellent job remodeling my bathroom. I love how it came out. He was very responsive to my calls and emails. I will use Rainstone construction again for home projects.

Top Pro
Joat Services & Repair
4.7
from 18 reviews
  • 20 years in business
  • 31 hires on Thumbtack
  • Top Pro on Thumbtack
Edwin Y.
Verified review

Jim did an amazing job on the tiles in the kitchen. The experience working with Jim is what it should be when working with a contractor. He started and ended the job on schedule even though there were issues with the existing concrete sub floor. I am extremely happy with the work.

Top Pro
Xcc pro builders llc
4.7
from 17 reviews
  • 4 years in business
  • 25 hires on Thumbtack
  • Top Pro on Thumbtack
Sharon S.
Verified review

XCC did a perfect job installing my hardwood floors in two large rooms. There were lots of complications with rooms being out of square, un-level surface around the fireplace due to mortar, and border patterns with different wood, and insets. All of it came out perfectly and with very little wood waste (way less than other contractors would have done). Xavier and his crew also did a great job replacing my damaged sub-floors throughout the entire house - a task that no other contractors were willing to take on. Xavier and his crew always worked hard and are very pleasant to be around. They have wide knowledge and skill sets and are willing and able to do anything you might need. No lazy-bones or burn-outs in this crew!

James Stepanian, Contractor
4.7
from 9 reviews
  • 38 years in business
  • 12 hires on Thumbtack
Kimberly C.
Verified review

My project had changes along the way, but they only made the results even better. I had a vision of what I wanted and he and his team made it a reality. The quality of the work is not only solid but I can rest easy knowing I have a room i can be proud of and enjoy for many years to come. The people he works with for electrical, masonry and landscaping work were all professional and thorough as well. Kudos to all. What a difference!

Top Pro
  • 5 hires on Thumbtack
  • Top Pro on Thumbtack
Karl S.
Verified review

I have had repairs as well as custom work done by Cosco Custom Home Remodeling. The quality of the work was excellent. The work was completed in the time that was promised, and the cost was the price quoted. I would definately use them again.

  • 19 years in business
  • 2 hires on Thumbtack
Ryan B.
Verified review

My wife & I interviewed 14 general contractors for our complete home remodel project (3 new & expanded baths, new vaulted ceiling & tiled shower in master bath, new tray ceiling & barn door closet in master bed, new screened-in porch, new front porch & front door, new & expanded wall of colonial windows in living room, finished garage, siding repair). This is a big project & we wanted to make sure that we hired a GC that (1) is skilled, experienced & has a track record of high-quality work, (2) is trustworthy, ethical, communicates well, easy to work with, and, (3) charges a fair rate for his work. Ralph is a rare find and checks all of these boxes. You should always speak with as many contractors as possible in order to find the best match for your project, and, Ralph should absolutely be on that list. We are very impressed and very happy with Ralph, and, we HIGHLY recommend that you discuss your project with him before making a final decision. He's a hard-working, highly-skilled GC that does the right thing by his customers at a fair price.

Q & A

Answers to commonly asked questions from the experts on Thumbtack.

What is a general contractor?

When starting a home remodel or new construction project, you will probably hire a general contractor. A general contractor is a professional who is qualified to take a set of building plans and construct them as outlined. The general contractor may help perform the day-to-day building, or they may just hire workers and oversee all the work activities. In either case, the job of the general contractor is to see that your project gets built.

When you have a building project, ask for bids from various contractors. The bids tell you how much each will charge and what their scope of work will be. Once you have selected a bid, you sign a contract with that general contractor outlining the specifics of the project and the milestones during the project when they will receive payment installments. Once the contract is official, the general contractor will bring in their crew to begin construction. The contractor will manage the workers and subcontractors (anyone who doesn’t work directly for their company but that they need to outsource, like a marble installation pro), order all the materials, obtain work permits, and confirm that all the workers and subcontractors are completing their projects as planned. They typically handle all the payments to the workers and subcontractors, and send you invoice. For all these reasons, it’s also especially important to follow a few smart hiring practices when it comes to finding a general contractor.  If you are organized and competent to oversee construction projects, and are able to make sure everything is being built properly and meeting code, it’s possible you can be your own general contractor.  

Why should you hire a contractor?

Hiring a general contractor is a good idea for many remodeling projects. Home renovation contractors have a broad range of skills to manage, coordinate and complete a project. They should help make sure your project comes in on time and within your budget as they hire and supervise all the necessary subcontractors, including electricians and plumbers. They also handle procuring all the materials required for your job. Some homeowners look to save money by acting as their own contractor, but an experienced home renovation contractor is worth the cost. They should know local building codes, be able to pull all necessary permits, and work with inspectors to make sure the construction meets local codes. Also, because they get professional discounts, they can typically buy materials at a better price than you can; better prices on materials and labor save you money, and make up for at least a percentage of the cost of the contractor.

When should you hire a contractor?

A few home remodeling projects can be done by an ambitious DIY-minded homeowner or local handyman, but many are best completed by a professional home renovation contractor. You should hire a contractor when you’re planning a large project that takes time, machinery or large tools, and several workers; a kitchen remodel, new bathroom or home addition will be most successful with a licensed, expert contractor at the helm. It’s particularly important to have a professional contractor on board for construction, electrical, plumbing and HVAC projects that require inspections to meet local building codes. Of course, you can hire a contractor for smaller projects, too, if you prefer to let an expert handle things like addition or removal of a wall, small framing projects, or anything that requires a permit.  

You should hire a contractor when you’re ready to start a remodeling project and you have plans, a budget and a timeline for the work in hand, but before any remodeling work begins.

How much will it cost to remodel my house?

The cost to remodel a home is highly variable — size and scope of the project, quality of materials, and the number of subcontractors required to complete the job all affect the total cost. The average national cost of a home renovation project is $13,500. The national average per-square-foot cost of a remodel ranges from $25 to $100. Nationally, kitchen and bathroom remodels are the most popular types of projects, in part because they typically have the highest return on investment when the home is sold. The national average cost of a major kitchen remodel ranges from $25,000 to $62,000, while the average bathroom remodel tends to cost $6,000 to $18,000. In addition to materials and labor costs, many remodeling project costs include permit fees, which, average $900 or more, depending on your location.

Do I need a contractor for a kitchen remodel?

A kitchen remodel is one of the most important investments you can make in your home, and it’s critical to get the details right; that’s where a home renovation contractor comes in. A minor remodel usually includes new cabinet faces and hardware, replacement appliances, and paint, while an extensive job may enlarge the kitchen’s square footage, install new cabinets or an island, change the layout, and lay new tile or hardwood floors. Any renovation that includes filing permits, construction, or electrical or plumbing work is best completed by an experienced contractor who knows local codes.

Hire skilled professionals for absolutely everything.