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TRUSTED BY GUILFORD, CT HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon433
    Verified window services reviews

Top-Rated Window pros in Guilford - Updated Nov 2026

Avatar for The Highland Window Company LLC
The Highland Window Company LLC
4.9(
158
)
New Windows - 6 +New Windows - Multiple

Serving Guilford, CT and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I can’t speak highly enough of Marc Cowan. He installed new windows for me 14 years ago. Recently one window got broken and needed to be replaced. He did replace it for me without cost. He and his crew are gentlemen. Jane O."
Vinyl Siding Replacement
Sun Room Conversion
Window, Siding, Door, Gutter Replacement
Triple Casement Replacement
Vinyl Siding Replacement

+50

Response time8 hrs
18 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Action Windows & Siding LLC
Action Windows & Siding LLC
4.6(
30
)
New Windows - 6 +New Windows - 3-5New Window - Single+9 more

Serving Guilford, CT and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"Second time hiring Action windows and I wish I could hire them for everything. Where it counts us if you have an issue and how it's handle. Small. Problem was handled asap and they even sent manufacturer out right away to repair it. Said they would do it themselves if necessary. Wonderful superb company to work with. You won't be sorry. I look forward to siding next with Action windows and siding."
CCSU
Arch Windows
Specialty Windows
Commercial Windows
Conservatory in Avon

+7

Response time2 days
Response rate100%
10 neighbors recently requested a quote
Avatar for Valerie Spencer Interiors LLC
Valerie Spencer Interiors LLC
5.0(
90
)
Hardware, Latches & Tracks (Window) - Repair or ReplaceWindow Frame - RepairWindow Well Covers - Install or Repair

Serving Guilford, CT and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"Great!! Brian accomplished a very professional job on door lock and window shade installations. Very efficient and pleasant to do business with. Offers such a wide variety of handymen services, I would definitely consider his services for other projects as well. Nice workmanship!"
Additional Photos
Additional Photos
Response time1 day
1 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for New Haven County Window Cleaners, LLC
New Haven County Window Cleaners, LLC
4.4(
68
)
Window Cleaning

Serving Guilford, CT and surrounding areas

Approved

In business since 1995

Free estimates

Credit card accepted

"Maddy & Angel showed up today, explained what they would be doing in what order. Maddy cleaned the center hall chandelier & the palladium second story window while Angel set up outside to start power washing the house. By the time they were finished, our house looked brand new! The were efficient, courteous, accommodating and extremely professional including explaining the seal to the palladium is broken and we will need to replace that huge window! We will use them again, I highly recommend using their services! We couldnâ t be happier!"
 1
 1
 2
 2
 3

+13

Response time4 days
21 neighbors recently requested a quote
Recommended by93%of homeowners
Highland Window Company, LLC
4.6(
44
)
New Windows - 6 +

Serving Guilford, CT and surrounding areas

Approved

In business since 2002

Free estimates

Warranties offered

"We shopped around before finding Marc and Highland Windows and once we met Marc and heard how he runs his business and saw his reasonable prices we were sold! Highland Windows has been the most pleasant, easy experience working with a contractor that weâ ve ever had. Marc responds very quickly to texts or calls. Heâ s very professional, as is his team. The product and service they provide is unmatched. I would hands down reconnect Highland Windows to anyone."
West Hartford
Plainville
Plainville
Avon Window
Avon Window

+8

Response time9 hrs
Response rate100%
Recommended by65%of homeowners
Avatar for Nu Face of CT, LLC
Nu Face of CT, LLC
4.5(
243
)
New Windows - 6 +New Windows - 3-5

Serving Guilford, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Warranties offered

"The replacement of windows went smoothly and efficiently. No issues. Excellent job cleaning up and listening to my concerns. Highly recommend Joe and company."
 Before
 1
 crown molding
Contemporary Kitchen - Wood Black Black Leather Office Chair On Wheels
Transitional Kitchen - Cozy Gray Dining Table Counter Top Attached To Kitchen Island

+186

Response time9 hrs
6 neighbors recently requested a quote
Recommended by81%of homeowners
Avatar for DiGiorgi Roofing & Siding Inc
DiGiorgi Roofing & Siding Inc
4.6(
202
)
New Windows - 6 +New Windows - 3-5

Serving Guilford, CT and surrounding areas

Approved

In business since 1933

Free estimates

Emergency services offered

"Excellent , Excellent, and Excellent  from the sales personnel Al Vestro, office , and work people  Jeff and helper.  Digiorgi    professionalism from start to finish! including clean up!!
The basement windows are super ,air tight, easy open!
Now my basement is protected from old window air leakage especially with the harsh New England winter weather we have been experiencing!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+33

Response time3 days
Response rate100%
22 neighbors recently requested a quote
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Windows FAQs, answered by experts

Deciding whether to repair or replace a window depends on the specific issue, the window's age, and the cost-effectiveness of the solution.

Repair is often better for:

  • Minor issues such as a single broken glass pane, a stuck window, or small leaks. Repair is typically more affordable for isolated problems.

Replacement is the better long-term solution for:

  • Major problems like deteriorating or rotting frames, significant leaks, or drafts.

  • If your windows are over 15 years old, as repairs may only be a temporary fix for an aging unit.

  • If you have a widespread problem affecting several windows.

The best homemade cleaning solution for windows is one gallon of warm, distilled or bottled water mixed with five to ten drops of liquid dish soap. This is what professional window cleaners typically use when they make their cleaning solutions. Using bottled or distilled water will help avoid hard water stains after cleaning, and the soap will cut through grease, smudges, and debris on your glass.

Window replacement is typically always worth the cost, both from a money-saving standpoint and a comfort standpoint. If your windows are older and significantly damaged, a window replacement can actually save you money in the long term by improving energy efficiency. If your windows aren’t up to code, you may not really have a choice. 

Double-pane windows offer several key benefits, making them a worthwhile investment. They provide superior insulation and energy efficiency compared to single-pane windows, which helps limit heat loss, maintain more comfortable indoor temperatures, and lower your utility bills. The design, which features two panes of glass filled with air or gas, also dramatically reduces noise from outside, making your home significantly quieter. Additionally, the dual-pane construction strengthened by spacers improves the durability and security of your windows.

A good U-factor for windows is 0.30 or lower, but they can range from 0.20 to 1.20. A general rule of thumb when it comes to the U-factor is that the lower, the better.

The Guilford, CT homeowners’ guide to window services

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