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TRUSTED BY COS COB, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon161
    Verified window services reviews

Top-Rated Window pros in Cos Cob - Updated Nov 2026

Good Fellows Window Corporation
4.7(
176
)
New Windows - 6 +

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1996

Free estimates

Warranties offered

"After reading the excellent reviews of Goodfellows Windows, I reached out to the company for a quote. Gary, the owner, came to my house and quoted an amazingly affordable figure. We decided to replace every window in the house including a large bay window. We also replaced a sliding glass door off of our family room, a outside door leading to our deck, and a front door unit consisting of a door and a glass window with internal shades. Because of Covid 19, our order took longer than projected. This was not the fault of Goodfellows. Our sliding door, deck door, and front door were put in first. The workers, Phil and Orlando took meticulous care to make sure everything fit perfectly. The windows finally arrived in early July and were installed over a three day period. There was a total of 28 windows. Some installation required extra work, but this was accomplished by the highly skilled team of Phil and Orlando. Gary was onsite during the entire procedure. I cannot overemphasize my satisfaction with the job performed. They even removed all my blinds and reinstalled them after the windows were put in. Get quotes from every company you want, but I guarantee that you will choose to hire Goodfellows Windows for your project. They are the BEST."
Bay windows
Taking out the old
Before
 Before
 Starting

+45

2 neighbors recently requested a quote
Recommended by97%of homeowners
Renewit Window and Glass Repair
4.6(
161
)
Door or Window Screens - Install or RepairWindow Glass - Install or Replace

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1970

Free estimates

Offers commercial services

"We just needed the pane in one window replaced. They came to look at it the same day I called. He measured and ordered the window in less than 10 mins. As he said, 10 days later the window pane arrived. They came and installed the window that day in less than half an hour. The service was great, timely and affordable. I will definitely remember them for any future window replacements."
Response time2 days
19 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for ProEdge Remodeling - Windows
ProEdge Remodeling - Windows
4.6(
38
)
New Windows - 3-5New Windows - 6 +

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1961

Free estimates

Credit card accepted

"I waited a while because they are backed up due to Covid but they were definitely worth the wait. They were precise, quick and extremely detailed. They put two windows in for me (where windows didn't exist before) and covered up a window. They insulated and everything. No painting but that was cool. I was very impressed. Definitely would recommend them and hire them again...and again....and again"
2021 Window Projects 44
2021 Window Projects 44
2021 Window Projects 44
2021 Window Projects 44
2021 Window Projects 44

+38

Recommended by94%of homeowners
Avatar for Guncay Glass & Mirror
Guncay Glass & Mirror
5.0(
28
)
Window Glass - Install or Replace

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"2nd time I’ve hired Diego to make a custom glass door for a bathtub. His workmanship is excellent and that of a perfectionist. Very clean. Goes over all of the details before doing the project, gives a quote on the price, and then keeps to the timeline to get the job done. No fuss. No mess. Can’t ask for anything more."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+37

Response time1 day
1 neighbors recently requested a quote
Recommended by89%of homeowners
C A Y Window Cleaners
4.4(
20
)
Window Cleaning

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"We highly recommend CAY Window Cleaners. They responded immediately to our request for a quote, scheduled us to have the work done immediately and did an excellent job ! We are very pleased and plan to have Carlos do our windows a few times throughout the year. Nothing like sparkling, clean windows to make ones home so beautiful !"
Response time3 days
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for BRT Services, LLC
BRT Services, LLC
4.9(
40
)
Door or Window Screens - Install or RepairEgress Window - InstallHardware, Latches & Tracks (Window) - Repair or Replace+7 more

Serving Cos Cob, CT and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Brian came over very quickly after my initial call. We had damage to a window and to our dock after the serious storm that hit Greenwich, CT and other nearby areas last weekend. Brian was prompt, easy to talk to and gave us a very fair price for the work. Today the work was completed by Brian and two other men who assisted him, and everything they repaired/replaced looks better than it did before. I would recommend him to anyone and am glad I found a great company to hire for work we need done in the future."
Project 1
Project 3
Project 1
Project 2
AFFILIATIONS

+7

Recommended by100%of homeowners
Avatar for Fer Home Services, LLC
Fer Home Services, LLC
5.0(
43
)
Door or Window Screens - Install or RepairHardware, Latches & Tracks (Window) - Repair or ReplaceNew Window - Single+1 more

Serving Cos Cob, CT and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Fernando, Louis and Marco are consummate professionals who are highly skilled. They resolved many of my needs, including the installation of crown molding and baseboards, painting, cabinet door realignment, and sliding door repair. Although they are more expensive than home services I have used in the past, they match or exceed in quality the workmen I've used for my home. As for responsiveness, timeliness, and cleanliness, nobody beats them. They are the best. It was a pleasure having Fernando, Louis, and Marco in my home."
Exterior Project
Exterior Project
Exteriors
Exteriors
Exteriors

+28

Response time8 hrs
1 neighbors recently requested a quote
Recommended by93%of homeowners
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Windows FAQs, answered by experts

Yes. Thermal pane windows can be customized to fit a variety of different window sizes and dimensions. A contractor or manufacturer can usually offer custom sizing options based on your specific window requirements. You should consult with professionals who can assess your needs and provide the appropriate custom window solutions for your home.

Casement windows can either be left or right opening, and every window manufacturer makes both so that you can choose which works best for your space. In many cases, you’ll want one left-opening and one right-opening casement window to sit on either side of a picture window or to act as the side panels in a bay window. Just remember that the direction is described from the curb. An FCL (from the curb left) hinges out to the left if you’re looking at the exterior of your home, and an FCR (from the curb right) hinges out to the right.

Yes, triple-pane windows are more resistant to condensation. They help to reduce interior condensation that forms as a result of warmer temperatures inside your home than outside it. This makes them a good fit for cooler climates, particularly with newer, well-sealed homes that retain higher levels of moisture in the winter months.

Most modern egress windows installed in basements open outward into a window well, although some older homes have in-swing windows. Egress windows, like casement windows used in other parts of the home, such as bedrooms and bathrooms, may open inward, and these windows are often larger than outward-opening windows.

To keep cold out, look for treatments that sit close to the window frame and are made from thick, insulating materials. Thermal curtains, cellular shades, window quilts, and insulated shutters can all help retain heat. Layering window treatments, like pairing lined curtains with cellular shades, can provide even better insulation by further reducing drafts and heat transfer.

The Cos Cob, CT homeowners’ guide to window services

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