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TRUSTED BY LONGMONT, CO HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon276
    Verified window cleaning services reviews

Verified Reviews for Window Cleaning pros in Longmont, CO

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

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

Last update on May 20, 2026

Find Window cleaners in Longmont

Avatar for Let There Be Light
Let There Be Light
4.8(
129
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Very professional. Best job of window cleaning we have had in Estes Park"
Response time5 hrs
70 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for JM Window Cleaning
JM Window Cleaning
4.9(
59
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"Exterior windows were cleaned ... excellent job."
I house in Parker
I house in Parker
I house in Parker
I house in Parker
I house in Parker

+68

Response time4 hrs
Response rate99%
25 neighbors recently requested a quote
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Avatar for JHJ Window Cleaning, LLC
JHJ Window Cleaning, LLC
4.9(
14
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"Affordable pricing and extremely good work. Our windows sparkle as if they were brand new, maybe even better. I will definitely hire Hazen and JHJ Window Cleaning again."
Crazy Mountain
Crazy Mountain Brewery
Garage Door Window
Garage Door Window
Crazy Mountain Brewery

+6

Response time5 hrs
Recommended by92%of homeowners
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Avatar for 20/20 Windows & Solar Cleaning Inc.
20/20 Windows & Solar Cleaning Inc.
5.0(
16
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 1999

Free estimates

Small jobs welcome

"Cleaner came right at the committed time and finished the job within the estimated time frame. Results look great."
Response time6 hrs
Response rate100%
3 neighbors recently requested a quote
Request Quote
Avatar for Abluent Window Cleaning, LLC
Abluent Window Cleaning, LLC
4.3(
34
)
Window Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2010

Free estimates

Customers say: True professional

"They were responsive and did an EXCELLENT job. Very professional. I would recommend to anyone and will be using them again. Thank you!"
Tyler on a ladder. Abluent, Ltd. window cleaning
Tyler cleaning windows for Abluent, Ltd.
Inside Mountain Home Window Cleaning, Great View!
Commercial Store Front Window Cleaning
Reflections on a cleaned window

+13

Response time1 day
Recommended by100%of homeowners
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Avatar for Spyglass Window Clean LLC
Spyglass Window Clean LLC
5.0(
5
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Joe was timely & efficient. My windows & screens looked beautiful when he was done. He was very meticulous & even cleaned the window tracks."
Front Entry
Side View
Side with patio and Garage
Response time5 hrs
Recommended by100%of homeowners
Request Quote
Avatar for Shine of Boulder
Shine of Boulder
4.8(
17
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Matt and his hard working team cleaned all our windows, screens, tracks, etc. In pre for a wedding we hosted at our home. They did an outstanding job, we're very conscientious and efficient. They're customized water pH system was interesting and efficient, allowed for streakless drying. Thier cost was reasonable for all the work it took to complete our home (~ 50 panes). Matt and his team were super nice. Several of our neighbors are planning to hire them. I highly recommend Shine for your window cleaning services."
Interior Window Cleaning
House Before
House Before
House Before
House After

+1

Response time1 day
Response rate99%
38 neighbors recently requested a quote
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Avatar for Summit View Window Cleaning
Summit View Window Cleaning
5.0(
7
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"I really appreciated the time they took to give me a fair estimate for my house windows. They got here on time for my scheduled appointment and got to work! I was really surprised at how dirty my windows were and amazed at how clean they look now. I am very happy with the quality and friendly service Phil and Seth provided. Can not wait for them to come back for my monthly appointments!"
Break Area Glass
Conference Glass
Break Area
Office Glass
Office Glass

+38

Response time1 day
1 neighbors recently requested a quote
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Avatar for J&T Window & Gutter Cleaning, LLC
J&T Window & Gutter Cleaning, LLC
5.0(
7
)
Window CleaningWindow Cleaning - For Business

Serving Longmont, CO and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Darian and Travis were quick to deliver great service when I needed an overdue cleaning. Would highly recommend them"
Clean Gutters!
Before (Dirty Gutters)
Window Cleaning
Window Cleaning
Window Cleaning

+5

5 neighbors recently requested a quote
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...
Showing 1-10 of 241
Window Cleaning questions, answered by experts

Getting a streak-free shine after cleaning your windows requires both the right cleaning solutions—which can either include warm water and dish soap or warm water and rubbing alcohol—and the right tools—namely, a squeegee and a microfiber cloth. To make your streak-free glass cleaner, combine one gallon of warm water with a few drops of dish soap, and mix. Apply with a sprayer or sponge, and then dry with a squeegee, microfiber cloth, or old black-and-white newspaper pages.

You should avoid using abrasive materials and harsh chemicals when cleaning windows. Abrasive tools like scrubbing pads, rough cloths, or steel wool can permanently scratch and damage the glass. Harsh chemical cleaners containing alcohol or ammonia can damage window treatments, frame materials, and special features like tinting. It is also best to use distilled or filtered water instead of hard water, which can leave spots or streaks. For best results, use a clean microfiber cloth to wash the glass and old black and white newspapers to dry it without leaving streaks.

Yes, you should plan on being home when a window cleaner is cleaning your windows. The professional will clean both sides of the glass and will likely disassemble parts of your windows from the inside to clean and inspect the inner components, including the balances and weatherstripping. Much of this work requires interior access to your home, which means someone will need to be home to provide access to the window cleaner.

Clutter and disorganization can make even a clean house seem dirty. Decluttering unused items will make your home seem cleaner, and putting storage solutions into place will give a house a more organized look and feel. Other things that can make a house feel dirty include stained or faded carpets and upholstery, dirty or dingy walls, chipped paint, and disorganized shelves.

Yes, professional window cleaning is worth the investment. Regular deep cleanings help keep your windows looking new, extend their lifespan, and boost your home's curb appeal. By removing dirt, dust, and other debris, you can reduce the risk of damage and accelerated wear to window frames and components. It also improves your home’s energy efficiency by keeping insulation and weatherstripping in good working order, potentially lowering your energy bills. Furthermore, annual or bi-annual cleanings can help identify problems like leaks or cracks early, before they escalate into expensive water damage. You can often recuperate the cost of cleaning through energy savings and by avoiding premature window replacement.

The Longmont, CO homeowners’ guide to window cleaning services

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

See all articles