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TRUSTED BY GREENWICH, CT HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon188
    Verified window services reviews

Verified Reviews for Window Service pros in Greenwich, CT

*The Angi rating for Window Service companies in Greenwich, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window Service needs.

*The HomeAdvisor rating for Window Service companies in Greenwich, CT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window Service needs.

Last update on March 16, 2026

Find Window pros in Greenwich

Avatar for Thermo Seal Windows Siding & Roofing
Thermo Seal Windows Siding & Roofing
4.7(
137
)
New Windows - 3-5New Windows - 6 +New Window - Single+9 more

Serving Greenwich, CT and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

"I'm so happy with my new windows! My only regret is that I don't have more windows to replace! Aaron and his team were a dream to work with - communicative, friendly, and direct. They worked with me to scope out exactly what I wanted and they were very transparent and fair on price. The installation team was efficient and respectful, making sure everything was done to the utmost standards. My windows look amazing but more importantly they work fantastically! I was shocked at how much quieter and cooler my house was after the new windows were installed, and they are so much easier to keep clean. I will be recommending Thermo-Seal to everyone!!"
Windows Project
Windows Project
Windows Project
Windows Project
Additional Photos

+29

Response time6 days
2 neighbors recently requested a quote
Recommended by99%of homeowners
Request Quote
Avatar for Power Home Remodeling
Power Home Remodeling
4.7(
379
)
New Windows - 6 +New Window - SingleNew Windows - 3-5+8 more

Serving Greenwich, CT and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Warranties offered

"Process was fully explained from start to finish and delivered as promised. High quality windows and attic insulation for an affordable price. Company was very professional and answered all questions. Great warranty. Installed 15 custom windows in one day. Definitely recommend!"
Fresh Curb Appeal
Full Home Remodel - Siding, Windows, and a Roofing system
Fresh Curb Appeal
Full Home Remodel - Siding, Windows, and a Roofing system
Fresh Curb Appeal

+41

43 neighbors recently requested a quote
Recommended by93%of homeowners
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Gunderson Flooring and Design
4.7(
114
)
Door or Window Screens - Install or Repair

Serving Greenwich, CT and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"Excellent experience; Jay was friendly, helpful and knowledgeable; he suggested some extras that made a huge difference in the project. The project was completed immediately and quickly and I'm very pleased with the result."
1
2
Traditional Kitchen - Cozy Warm Kitchen Island With Black Cabinets
4
5

+7

Response time7 hrs
28 neighbors recently requested a quote
Recommended by99%of homeowners
Request Quote
Avatar for Window Genie of Westchester
Window Genie of Westchester
4.8(
16
)
Window Cleaning

Serving Greenwich, CT and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"It was a fantastic experience. Kelly worked efficiently and did a superb job cleaning our windows and screens. We were extremely happy with the process and have already recommended Window Genie to a friend."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+6

1 neighbors recently requested a quote
Recommended by93%of homeowners
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Avatar for Ivis Cleaning Services
Ivis Cleaning Services
5.0(
71
)
Window Cleaning

Serving Greenwich, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Offers commercial services

Customers say: Terrific value

"Clear description of work. Stuck to schedule and did a great job cleaning the windows."
Storefront Detail
Crystal clear
Taco project
Response time4 hrs
Response rate100%
31 neighbors recently requested a quote
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Avatar for Renuity
Renuity
4.4(
35
)
New Windows - 6 +New Windows - 3-5

Serving Greenwich, CT and surrounding areas

Approved (Corporate)

In business since 2000

Free estimates

Warranties offered

"Installed 22 new windows, 2 entry doors, and new sliding glass door. Outstanding service, price, and installation. Highly recommend."
Entry Door
Doors
Doors
Doors
During Installation

+55

Response time6 hrs
1358 neighbors recently requested a quote
Recommended by69%of homeowners
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Avatar for Guncay Glass & Mirror
Guncay Glass & Mirror
5.0(
25
)
Window Glass - Install or Replace

Serving Greenwich, CT and surrounding areas

Approved

In business since 2017

Free estimates

Emergency services offered

"Worked with Guncay Glass & Mirror several times with Satisfactory results and professionalism in each project. Well priced and always on time, will keep using them over and over."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+37

Response time1 day
Recommended by100%of homeowners
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C A Y Window Cleaners
4.4(
20
)
Window Cleaning

Serving Greenwich, CT and surrounding areas

Approved

In business since 2001

Free estimates

Credit card accepted

"Carlos was very great to work with. Was flexible with scheduling and did impeccable work. My windows are spotless! He was also able to have the entire interior of the house cleaned. Highly recommend Carlos for both window cleaning and interior cleaning services."
Response time3 days
8 neighbors recently requested a quote
Recommended by100%of homeowners
Request Quote
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Showing 1-10 of 848
Windows questions, answered by experts

To lower your home’s humidity level overnight, you can open your windows when the air is less damp. This tactic allows air to circulate around the window, preventing condensation from forming. However, you should consider the disadvantages of leaving your windows open overnight, including safety risks and pest intrusions.

Storm windows are placed outside of already-installed windows. Regular windows are installed into a frame, offering a barrier to the elements but no special protection. Storm windows add extra protection to regular windows, reduce noise, and improve insulation. Replacing a regular window involves a different process than installing a storm window. 

Yes, including the frame instead of just referring to the glass opening for window dimensions is the standard. However, some manufacturers may refer to the rough opening instead of the framed opening when listing sizes. Always confirm which measurement a manufacturer is using before ordering windows.

Energy-efficient windows are judged on their performance according to a few different factors, including heat transfer, air leakage, light transference, and condensation resistance. If you're unsure whether a window is energy-efficient, look for an ENERGY STAR® label from the U.S. Environmental Protection Agency (EPA). If various products, including windows, meet energy-efficiency standards set by the federal government, the EPA issues this label to help consumers identify energy-efficient products.

In short, it depends. After 20 years, the glass in your windows is less energy efficient, which can cause increased electricity bills. You might also see signs of water damage or natural wear and tear over the years. However, with proper maintenance, some window frames can last up to 50 years, so you may only need to replace the glass to save on energy. 

At the same time, window replacement is a major investment, so replacing the glass in rooms most impacted by outdoor temperatures is one way to avoid going all-in to replace your windows.

The Greenwich, CT homeowners’ guide to window services

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

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