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TRUSTED BY WILLIAMSTOWN, NY HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon13
    Verified window and door contracting services reviews

Top-Rated Window and door contractors in Williamstown - Updated Nov 2026

Avatar for JMT Construction of CNY LLC
JMT Construction of CNY LLC
4.6(
37
)
New Windows - 6 +Doors (Exterior) - Install or ReplaceEgress Window - Install+5 more

Serving Williamstown, NY and surrounding areas

Approved

Emergency services offered

Credit card accepted

Customers say: True professional

"JMT Construction was Great to work with from start to finish! Jim replaced 5 windows & our sliding glass door in a timely manner and put in extra time to accommodate our schedule. Would definitely recommend JMT Construction and will reach out when needed in the future!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+51

Response time1 day
8 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for C. Michael Exteriors, Inc.
C. Michael Exteriors, Inc.
4.0(
75
)
New Windows - 2New Windows - 3-5New Windows - 6 +

Serving Williamstown, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Warranties offered

"Had a great experience from beginning to end. C. Michael Exteriors, Inc. did a quick and easy job replacing our old picture window with this new window. Pricing and financing was much better than 2 other companies we had come out to try and sell us their windows. Thanks C. Michael Exteriors"
Replacement Bay Window
After install
After install
front of home before install
front of home Before install

+117

Response time12 hrs
Recommended by82%of homeowners
Avatar for GPG Construction
GPG Construction
4.8(
31
)
Doors (Exterior) - Install or ReplaceSliding Door - InstallStorm Door - Install

Serving Williamstown, NY and surrounding areas

Approved

In business since 2007

Free estimates

Customers say: Quick response

"Pete was excellent about keeping me in the loop. There were some problem areas underneath the old siding that needed repair as well and I was kept abreast of every situation. He was very responsive and easy to get a hold of."
Response time10 hrs
2 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for Pace Window & Door Corp.
Pace Window & Door Corp.
3.7(
98
)
Doors (Exterior) - Install or Replace

Serving Williamstown, NY and surrounding areas

Approved

In business since 1985

Free estimates

Warranties offered

"After door was installed the finished molding was not to our liking..We called Pace and they sent out Mike/Dan and they did a super job . This is our second door we have had installed. We would highly reccomend the company,the product and the installation. Thank you."
Response time4 days
132 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Stellar Roofing
Stellar Roofing
4.9(
21
)
New Windows - 6 +

Serving Williamstown, NY and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Hands down the BEST company to work with! Absolutely great experience from the sales person to the crew and supervisor that did our roof! Would never use any other company! Their work is immaculate and our roof looks stunning!!"
Response time2 days
556 neighbors recently requested a quote
Avatar for Harnas Home Services
Harnas Home Services
5.0(
10
)
Doors (Exterior) - Install or ReplaceDoors (Interior) - Install or Replace

Serving Williamstown, NY and surrounding areas

Approved

Free estimates

Small jobs welcome

"Had a few small projects that needed to be done. One was a toilet issue which he knew the problem and was able to fix it very fast. The other was my outdoor lights. The winter ice build up destroyed my front lights and he managed to get those repaired fast and at a good price. I would fully recommend if you have any issues. Very knowledgeable and willing to help any way he can."
Ceiling fan
Deck Rebuild
Patio
Post repair
Shed siding

+10

Grady's Painting Plastering/Construction
2.0(
174
)
Window Well Covers - Install or Repair

Serving Williamstown, NY and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"When confronted with a crisis because of a copper plumbing burglary, Mr. Grady, of Grady's Painting, Plastering and Construction, willingly traveled many miles to come to my aid. Requesting only a $1.00 deposit against a $4,500.00 job, he masterfully reconstructed my nineteenth century lath and plaster hallway wall, also thoroughly compensating for a missing portion of a central stud unwittingly removed by a plumber! After his extensive search for appropriate composition and dimension of material, he replaced and replicated a section of my forty-year-old faux onyx tub surround with common white PVC sheet, tinted oil-based colors, glaze, paint brush, and a rag. His applied natural talents and superlative skills saved me thousands of dollars! On the basis of both professional conversation and knowledgeable observation, Mr. Grady possesses the intrinsic knowledge of old-world trades, the artistic capabilities, the problem=solving thought processes, and the personal work ethic to accomplish a broud scope of reconstruction and restoration."
Response time11 hrs
Response rate100%
Recommended by57%of homeowners
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Window Door Contractors FAQs, answered by experts

Yes, if you have ventilated skylights, you can install insect screens on them. Insect screens for skylights cost $10 to $50 each, depending on their size and quality. Most pros highly recommend insect screens for ventilated skylights because they keep pests outside of your home while allowing fresh air inside.

Yes, you can fix windows without replacing them. However, this will depend on the severity of the issue and what your needs are. Minor water damage, broken glass, damaged casing, and worn caulking are usually easy repairs. But if there is excessive damage, the windows are constantly foggy, or the windows are very old, it’s best to consider replacing them. Replacement windows cost between $575 and $1,475 per window, or an average of $850 per window. 

Ensures proper fit and function, maximizing insect protection and airflow.

There are many ways to customize screens, including customizing frame colors and mesh styles to complement your home’s aesthetic.

Adding a window to a brick house costs $3,100 to $10,575. Because you’ll need to make changes to the structure of the home, the cost will include obtaining permits and hiring the best pros for this complex job. Larger windows will cost more to install, and the cost can vary based on the window frame material you choose.

The Williamstown, NY homeowners’ guide to window and door contracting services

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