Tarylen Cleaning Services
“Whether we need one room cleaned, or a whole house cleaned, from tenant turnover cleaning to full construction/remodel cleaning, the work is good and the price is right.”
Best Commercial & Office Cleaning in Longmont, CO
24 companies listed · 4 in Longmont · 1 open 24/7 · 11 open weekends · 22 rated 4.5+
Data verified October 27, 2026
Natures Choice Cleaning
“It's clear that Nature's Choice takes pride in fostering a healthier, happier environment for their clients, and that they truly want to help us make our lives just a little easier.”
Casabella
“I'm typically a little hesitant to have my house cleaned - based on poor past experiences, but the level of service the Casabella crew provided has changed my mind.”
Jems Cleaning & Janitorial
“Did a great job on my carpets!!”
John's Cleaning Company
“I had them for snow removal, they did great, when I decided to move, they were there and did an amazing job of helping me get rid of things and then they did my cleanout and did a wonderful job, if I need help with cleaning I would use them again”
Clean Conscience
“We have loved many of our cleaning teams, but today our house was a dusty disaster after a small renovation project and Patricia and Julia came and made it sparkle again!”
Listed for businesses in and around Longmont, CO, these 24 companies hold commercial cleaning contracts. Contract cleaning is priced off a written scope and a frequency schedule, so two quotes are only comparable when both are working from the same specification.
Area overview: Longmont, CO
4 of the 24 companies we list are based in Longmont; the other 20 serve Longmont from towns including Boulder (13 mi), Lafayette (11 mi) and Erie (8 mi). The companies on this page are rated from 4.2 to 5.0 across 2,133 reviews; 12 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise quality (87%), professionalism (85%) and responsiveness (75%). The topics that come up most in reviews of the companies on this page are "communication", "price" and "crew". 1 is open around the clock; 10 are open on Saturdays and 4 on Sundays. The services the companies on this page list most often on their websites are carpet cleaning (5), commercial cleaning (4), office cleaning (3), post construction (2) and window cleaning (2). 3 show a license on their websites and 4 have a BBB rating of A or A+. 15 have ten or more years of experience, the longest 32 years. 1 offers emergency call-outs; 12 give free estimates; 9 are family- or locally-owned and 4 list coupons or special offers. 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.
Will a company survey the building before quoting?
A free quote is offered by 12 of the 24 commercial cleaning companies listed. Insist the survey happens on site and at the hour the work would run, because an empty office at noon tells nobody what the restrooms look like at six in the evening.
The Cleaning Fairies
“It was my first time trying a cleaning service and I was a little nervous at first, but the communication was informative and the email correspondents helped guide me to the services that my home needed!”
Rocky Mountain Cleaning
“The two women listened extremely well to my requests and followed through with using only non-toxic products, no water on the wood floor and everything sparkled when they were finished.”
Sunset Hill Window Cleaning
“We've been in our house for 5 plus years and for 5 years the underground downspout in front of our house has been jammed, leading to ice patches on the walk to our front door.”
2 Buckets Cleaning
“Overall, I was satisfied and very grateful that my house was clean, as I felt I was in over my head with the amount of work I would've had to do myself if they had not come, considering other life matters.”
Clean Can Now
“These guys showed up the day after my inquiry( I did message them the day of my trash pickup) but the communication was perfect and the cans are spotless clean and smell wonderful.”
Precision Carpet Cleaning & Janitorial
“The guys arrived just ahead of their scheduled time and got right down to business, did an amazing job on some pretty tough areas and even left their air handlers (and some clean booties) with us overnight to make sure it was all dry.”
Fusion Cleaning
“If you like hiring a local company that does a great job, and provides you with thoughtful customer service and a personal touch, you won't be disappointed!”
Proclean Services LLC
“I had an issue earlier in the year that I communicated to Carly and she was so responsive and super respectful of my concerns and I haven't had an issue since then.”
Household Solutions
“Household Solutions does such a fantastic job for the my business in Erie, so I recommended them to another company in Berthoud and they take great care of them too!”
Verde Cleaning
“They did a deep clean since we're having a housewarming party tomorrow and I feel such a sense of relief that our house looks so fresh and clean and cared for.”
GBS Commercial Cleaning
“My office hired GBS Commercial Cleaning to clean our offices several years ago and they were our janitorial service until COVID-19 sent us all home to work.”
Avalanche Power Clean
“Avalanche Power Clean did an excellent job!”
Dandelion Cleaning
“First, I scheduled an in-home consultation for a deep clean with Kati (business owner) the night before on their website and she was there right on time that next morning.”
Yost Cleaning
“They are professional, trustworthy thorough and always leave the space exquisite.”
Maid For You Eco House Cleaning
“I hired Maid For You after having awful experiences with their competitor and I wont mention their competitors name because I do not want to advertise for them, even negatively.”
Reliant Cleaning Services
“We were so impressed by the way the situation was handled and how quickly the objects were relocated as well as the professionalism and good attitudes shown by Graham and Darryl.”
Advanced Professional Cleaning
“Professional, Polite, and efficient!”
Clean Option Services
“We have been using Clean Option Services to clean our vacation rental for 2 years, and they have always gone above and beyond to make sure our home is prepared for guests.”
Why these companies made our list
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