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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
60 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 time5 hrs
Response rate98%
32 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 time5 hrs
Response rate96%
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
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

"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
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 rate95%
44 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 time9 hrs
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

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

The simplest way to clean stained glass windows is by using warm distilled water and a damp cloth. Distilled water won’t corrode the stained glass or leave residue behind. Avoid using cleaners with alcohol or ammonia. However, you should only clean when necessary. Stained glass windows are fragile, and excessive cleaning could cause fading, weakening of the solder, or other damage.

Professional window cleaners typically use either a white vinegar solution or a commercial hard water stain remover to clean hard water stains on windows. A common vinegar solution for this purpose consists of one cup of white vinegar mixed with a gallon of distilled or bottled water. The pro will spray the mixture and lightly scrub the window with a scrubby pad before cleaning with a standard cleaning solution. Alternatively, they may use a commercially available hard water stain remover and a scrubby pad, followed by a complete cleaning.

Yes, you can use glass cleaner on outside windows, but only after you’ve rinsed away as much debris as possible. Using glass cleaner on top of a layer of dirt will only make it harder to clean. 

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.

One of the best professional cleaning solutions that won’t leave streaks is one gallon of distilled or bottled water mixed with 2 to 4 teaspoons of dish soap. Apply using a sponge in a figure-eight motion, and then use a squeegee to remove the majority of the water and soap. You can finish drying with a piece of old black-and-white newspaper to remove any residue for a streak-free clean every 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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