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Top-Rated Contractors in Williamstown - Updated Nov 2026

Avatar for DDIY: Don't Do It Yourself Inc.
DDIY: Don't Do It Yourself Inc.
5.0(
4
)
Major Home Repairs (General Contractor)

Serving Williamstown, MA and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

DDIY: Don't Do It Yourself is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

Response time5 hrs
3 neighbors recently requested a quote
Recommended by100%of homeowners
Sonart Construction Corp.
2.3(
7
)
Major Home Repairs (General Contractor)

Serving Williamstown, MA and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

Sonart Construction Corp. has over15 years of experience in providing a variety of exterior and interior renovation services. We provide services to Palm Beach, Broward and Miami-Dade Counties.. We specialize in Bathroom Remodeling, Kitchen Remodeling, Flooring and the list goes on. Customer satisfaction is what determines our success, which is why we take a hands-on approach and keep the customer informed through every phase of the project. When interacting with our company, you'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing, and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your renovation needs. Give us a call today!

Avatar for Alliance Home Improvement Inc
Alliance Home Improvement Inc
4.8(
210
)
Major Home Repairs (General Contractor)

Serving Williamstown, MA and surrounding areas

In business since 2007

Free estimates

Emergency services offered

"The men who came to do the job , did a great job and were always on time and always cleaned up after the job each day. I would definately recommend this company to anyone who needs work done to their home. You would not be dissappointed in having this company do any work for you. I highly recommend ,"
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+54

Recommended by99%of homeowners
Avatar for New England Home Renovations LLC
New England Home Renovations LLC
4.0(
311
)
Major Home Repairs (General Contractor)

Serving Williamstown, MA and surrounding areas

In business since 1983

Free estimates

Emergency services offered

"Appointment  to review  various needed repairs was made within a reasonable amount of time. Contractor did show up and was on time at the time of the appointment. (This is why I gave them the overall C rating)...... Now to the disappointing part.... When leaving, contractor said he would get back to me within a few days with estimate. A week went by with no estimate received  from contractor. I called contractor again and was told he would have estimate for me by the next day.. It is now a week later and still no estimate has been received. Based on their previous good reviews, which was what lead me to call then in the first place, they are probably good at what they do and may have done the repairs at a reasonable price, however, I didn't get a chance to find out as I  was never supplied an estimate. Disappointing because I took time away from work to meet with the contractor, which turns out was a waste of time for both of us. Wont bother calling them back because if I cant rely on them to get back to me with an estimate, how can I trust that they will complete the work needed in a timely manner?
"
Before
After's
New boiler install
Removal of cast Iron to PVC.
Additional Photos

+37

Recommended by89%of homeowners
Avatar for The BullBag
The BullBag
5.0(
15
)
Major Home Repairs (General Contractor)

Serving Williamstown, MA and surrounding areas

In business since 2001

Credit card accepted

"I have now had 4 pickups from this company. Each time it has been with different items: I have had my kitchen remodeled,  a deck torn down and rebuilt, a new roof put on, old fencing disc arded, and a yard cleanup. The only difference in pricing was for the roofing and even though ti was more money it was STILL CHEAPER than a dumpster!!! I don't know how these guys do it, but they pickup on time, without issue andfor the cost quoted. I have turned each of my contractors onto them - now they are using them. SO MUCH cheaper and better service than any dumpster company I have used!"
The BullBag truck in MA
The BullBag truck in NY
Toys for Tots
Recommended by100%of homeowners
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Unfinished Carpentry FAQs, answered by experts

New builds, remodels, and additions often necessitate professional framing expertise.

Yes, you can find ceiling joists using simple tools if a stud finder isn't available.

Using a hammer requires patience and a keen ear. Gently tap the ceiling in a grid pattern, listening for sound changes. A hollow sound indicates space between joists, while a solid, dull thud suggests a joist. Mark the location with a pencil and confirm by tapping from different angles.

Alternatively, you can use a nail, but this method will leave small holes. You'll feel increased resistance when the nail hits a joist. Mark the spot and repeat the process every 16 or 24 inches to map the joist locations. This method is considered less reliable than using a stud finder.

Balcony construction or replacement typically requires a building permit from your local permitting authority. Safety and building integrity are the main reasons for the need to obtain a permit and the subsequent inspections. In some cases, especially cantilevered balconies, your municipality may also require the oversight and signature of a structural engineer.

For a professional carpenter, installing a window seat can take anywhere from a few hours to a few days, depending on some aspects of the project. Aside from building the seat itself, if they have to remove any cabinets, shelves, or baseboards, that will add time to the project.

Duration varies by project size, but average-sized homes typically take a weeks.

The Williamstown, MA homeowners’ guide to contractor services

From average costs to expert advice, get all the answers you need to get your job done.