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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
62 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

"Outstanding window cleaning! Jose arrived promptly and worked extremely efficiently. Have business now card and will be repeat customer."
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%
22 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

"WILL BE HAPPY TO USE THEM AGAIN. VERY PROFESSIONAL, FAST, FRIENDLY AND BEAUTIFUL WORK."
Crazy Mountain
Crazy Mountain Brewery
Garage Door Window
Garage Door Window
Crazy Mountain Brewery

+6

Response time5 hrs
Recommended by92%of homeowners
Request Quote
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

"They were prompt, professional and did a great job. My windows sparkle"
Response time6 hrs
Response rate100%
3 neighbors recently requested a quote
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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

"The best customer service I've received from a window cleaner. Great job!"
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
1 neighbors recently requested a quote
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

"Remember the days when you could trust a contractor to do an amazing job, You didn't need an estimate because you knew they would never rip you off. Their work and attitude were always exceptional. Well, the days of old are back with Spyglass. He is on time, first class, fabulous work and trustworthy. He does our window cleanering, gutters and special projects we need as elderly clients."
Front Entry
Side View
Side with patio and Garage
Response time5 hrs
Recommended by100%of homeowners
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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

"This was extremely excellent service. They cleaned very dirty windows and screens beautifully."
Interior Window Cleaning
House Before
House Before
House Before
House After

+1

Response time1 day
Response rate99%
42 neighbors recently requested a quote
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Avatar for Summit View Window Cleaning
Summit View Window Cleaning
5.0(
8
)
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

"Phil and Seth came over to my house to do some window cleaning. It was my first experience with professional window cleaners, and I must say they did an amazing job! I appreciate their attention to detail and also providing professional service from start to finish. I will definitely be calling back for more services!"
Break Area Glass
Conference Glass
Break Area
Office Glass
Office Glass

+38

Response time1 day
Request Quote
Avatar for Brightside Window Cleaning LLC
Brightside Window Cleaning LLC
5.0(
5
)
Window Cleaning

Serving Longmont, CO and surrounding areas

Approved

Free estimates

Offers commercial services

"Showed up right on time and got to work cleaning windows. Windows honestly look incredible after. Affordable fair price, very kind and easy to talk to staff, completely in a timely manner. Louie Owen did an outstanding job. Definitely going to call him again in the future."
Exterior Window Cleaning
Exterior Window Cleaning
Complete Window Cleaning
Complete Window Cleaning
Complete Window Cleaning

+6

16 neighbors recently requested a quote
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...
Showing 1-10 of 244
Window Cleaning questions, answered by experts

Most jobs take 2-8 hours, depending on the number of windows, height, and difficulty of access.

Clean regularly and inspect seals for wear. Replace damaged parts promptly to maintain effectiveness.

There are a few qualifying questions you can ask a professional window cleaner to help you decide if it’s the right company for you:

  • Does your price include the inside and outside of the windows?

  • Will you clean the tracks, rails, and other internal components?

  • Are you fully insured?

  • How many years of experience do you have?

  • What kind of cleaning products do you use?

  • Do you have any customer references?

  • Do you provide any other services, like exterior power washing?

Clean high-traffic areas such as kitchen surfaces, bathroom surfaces, and bedding once per week. Deep clean other areas every three months to a year. How you use a space can help you figure out how often it should be cleaned, with areas where eating, bathing, and food prep occur getting the most frequent attention.

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.

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