Zenith Window Cleaning
“Anyway, the windows are amazing, i keep telling my wife that I am glad I suggested that I'm we call Zenith (another Dad joke, this time only in-house).”
Best Window Cleaners near Longmont, CO
3 of these companies are based in Longmont; the others serve Longmont from towns including Boulder (13 mi), Loveland (17 mi) and Berthoud (10 mi).
3 open 24/7 · 13 open weekends · 23 rated 4.5+ · 2 show a license
Data verified October 28, 2026
Ace Window Cleaning Inc
“Ace Window Cleaning is a very professional, conscientious company providing excellent service at a reasonable price.”
Husband and Wife Cleaning
“Best I've found 👍 …”
Radiant Window Cleaning
“They did a high quality job at reasonable cost.”
Sonlight Window Cleaning
“Very thorough and very professional.”
Rocky Mountain Cleaning
“They took on all my Venetian blind slats, a shower stall that had never sparkled, and a kitchen floor (including grout) that had given me some serious attitude and worked miracles with them all.”
Listed for homeowners in and around Longmont, CO, these 24 companies clean windows. Ask whether a quote covers inside glass, screens and tracks or only the outside, because that single line is what makes two quotes look different when they are not.
Area overview: Longmont, CO
The 24 companies on this page are rated from 4.2 to 5.0 across 1,350 reviews; 10 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (89%), quality (89%) and punctuality (79%). The topics that come up most in reviews of the companies on this page are "price", "communication" and "estimates". 3 are open around the clock; 13 are open on Saturdays and 6 on Sundays. 2 show a license on their websites and 5 have a BBB rating of A or A+. 14 have ten or more years of experience, the longest 47 years. 3 offer emergency call-outs; 13 give free estimates; 7 are family- or locally-owned and 3 list coupons or special offers. We have a website on file for 22 of the companies on this page; 14 publish a contact page; 12 list a public email and 3 take bookings online. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
How many window cleaners are listed for Longmont?
This page shows 24 listings for Longmont. Because the work is sold as a repeat visit, ask each one which part of town it already covers and on what cycle. Slotting into an existing route usually costs less than a company driving out for a single house.
MG Cleaning Systems
“Great job with attention detail.”
Sunset Hill Window Cleaning
“Not only did they tackle the task with efficiency and professionalism, but they also went above and beyond to ensure everything was spotless before the storms roll in this weekend.”
Metropolis Window Cleaning
“It was tedious work and they showed meticulous attention to what needed to be done, which involved re-hanging misplaced crystals and cleaning all the bulbs and parts of two 41” chandeliers hung from 13' ceilings.”
North Star Window Cleaning
“After our house was cleaned following the Marshall Fire, their team came in and took out the windows and the tracks and put everything back sparking clean with no smell of smoke.”
Glass Geckö Window Cleaning
“We were so impressed with the quality of work both in the window cleaning and power washing of the stucco exterior of our home as well as our flagstone patios.”
Northern Colorado Window Cleaning
“There was construction in the previously vacant lot next to our home over the last year, so I was concerned it would be difficult to get our windows very clean, since they were filthy - but they look fantastic!”
Colorado Window Cleaning
“I'll be sure to schedule services with them in the future, refer everyone I know to them, and I'm leaving this review to assure others that their services will be money well spent!”
GBS Commercial Cleaning
“We recently had a somewhat complicated office renovation, and told the GC that GBS was the only company we would trust to take care of the post-construction clean-up.”
Rallo's Cleaning
“We had scheduled for later in the week and when the weather forecast looked bad, he contacted me and moved the date so I could get it done before the weekend.”
Avalanche Power Clean
“I only wish I would have taken before and after photos, it looked so great!”
Sunshine Window Cleaning
“Then one year I decided to see if I could save a little money and contracted with a lower price company.”
20/20 Window Cleaning
“These guys are great, the first time they came my shop windows were a mess; they spent most of the morning cleaning everything that had built up on the windows over the years, and I couldn't believe the difference!”
Immaculate Reflection Window Cleaning
“I always had absolute confidence in his quality level of work, and know that he will always make sure that even the most particular of clients are completely ecstatic with his service, and very reasonable prices!”
Blue Sky Window Cleaning Company
“They did a fantastic job on all my windows, and the hard to reach ones as well!”
Better View Services
“Before we moved into our custom designed home with almost 70% of the walls consisting of floor to ceiling windows, Better View was hired by our contractor for the move-in clean.”
Sky Service Pros
“We had been talking about needing to find someone to come and clean our very large windows, since they hadn't been done in awhile, when Zoi and April showed up at our door.”
Brothers Window Service
“Definitely take pride in their work and will make sure your windows are crystal clear.”
Keith's Window Cleaning
“We have big windows with screens and he took the time to clean the screens and replace them all carefully.”
Why these companies made our list
What customers say about companies near Longmont
- “The workers are very professional and courteous, do excellent work, and are very careful around the home.” — customer of Better View Services
- “Anthony was very courteous and professional. Did a fantastic job of cleaning our windows inside and out including the tracks, which haven't been cleaned in years.” — customer of Northern Colorado Window Cleaning
- “Our windows have never been cleaner. Prompt, thorough work from a true professional.” — customer of Immaculate Reflection Window Cleaning
- “They definitely went above and beyond. Brandon specifically took extra time to ensure that everything was cleaned to perfection.” — customer of Metropolis Window Cleaning
- “They are very responsive to requests and are very pleasant to work with.” — customer of Better View Services
Excerpts from public reviews of the companies listed on this page.
Is this page useful? Yes
No
Is there anything wrong with this page?
