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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 JHJ Window Cleaning, LLC
JHJ Window Cleaning, LLC
4.9(
14
)

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
)

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 time5 hrs
Response rate96%
3 neighbors recently requested a quote
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Avatar for Abluent Window Cleaning, LLC
Abluent Window Cleaning, LLC
4.3(
34
)

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
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
)

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
1 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Shine of Boulder
Shine of Boulder
4.8(
17
)

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 rate95%
43 neighbors recently requested a quote
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Avatar for Summit View Window Cleaning
Summit View Window Cleaning
5.0(
7
)

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 time9 hrs
1 neighbors recently requested a quote
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Showing 1-10 of 242
Window Cleaning questions, answered by experts

The most likely cause of smearing or streaking after cleaning your windows is residue left on the glass from the cleaner you’re using. Consider diluting the solution and cleaning them again, or use old newspaper to dry the windows after cleaning, as this will soak up any residual material. Additionally, aim to clean your windows on a cool, cloudy day, as cleaners will dry more quickly on the glass if it’s hot and sunny, promoting streaking.

Generally speaking, you should clean your windows and any associated fixtures and treatments every six months. Otherwise, clean them as needed to keep everything running smoothly. If you live in a part of the country with especially hard water, you may have to clean them three or four times per year, and the same goes for areas where insects, pollen, dirt, and other debris can soil your windows and potentially cause issues with the moving parts.

Professionals remove dust, allergens, and stains while preserving fabric integrity and enhancing the appearance of window treatments.

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.

A professional cleaning service generally takes a few hours, typically between 2 to 4 hours, depending on the property's size and the severity of any stains. Keep in mind that wet cleaning methods will require additional drying time.

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.

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