OCS LLC - Professional Window Cleaning Services

Who We Are

At OCS LLC, we're not just here to clean windows — we're here to make your space feel cleaner, clearer, and taken care of. Based in Kalispell and serving the Flathead Valley, we specialize in both residential and commercial window cleaning with a focus on quality, consistency, and personable relationships with our customers.

We treat every project like it matters — because to you, it does. Whether residential or a local business, we approach each job with care and attention to detail. We're not about shortcuts or surface-level service. We're about showing up, doing it right the first time, and making sure you're genuinely satisfied.

"Work Done Well, Work Done Right." That’s not just our motto — it’s how we operate.

What We Do

Residential Window Cleaning

Commercial Window Cleaning

Professional cleaning commercial windows

Additional Service Options

What They Say

★★★★★

"Highly recommended, fantastic service in all ways; the window cleaning itself and the customer service. Great price as well, highly recommend"

- Jayden Jacobson

★★★★★

"Barrett did a fantastic job on my building, he was prompt, prepared and professional. My windows look amazing, thank you so much!"

- Katerina Robinson

★★★★★

"Barrett did an amazing job on my windows inside and out very polite and very hard-working. I definitely will use him again and I highly recommend him."

- Debbie Turner

★★★★★

"Would definitely recommend and would hire again! I have heard of window washing contractors charging exorbitant fees based on amount of glass of course, but also on the affluence of the neighborhood...rest assured not only will Barrett do a fantastic job, it will be for a fair price!"

- Donna M

★★★★★

"Barrett does a fantastic job at cleaning windows! OCS did my father in laws business and the windows look amazing!"

- Cohen Booth

★★★★★

"Thank you so much for doing such an incredible job! Competitive pricing, thorough job, and very friendly. Will use you guys again and refer you to whoever is in need!!!"

- Darel Handley