KnockOutCleanersWindow cleaner in Montclair, CA

KnockOutCleaners is ranked #3 of 96 window cleaners in Montclair by CR Score, with 62 out of 100 as of November 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

KnockOutCleaners is open 7 days a week. Its listed hours are Monday to Sunday, 6 AM – 6 PM. On Saturdays it is open 6 AM to 6 PM, and on Sundays 6 AM to 6 PM. Hours come from the business listing; holiday hours may differ.

Serves Montclair and 11 towns within 15 miles: Claremont, Pomona, Ontario, Chino, La Verne, Upland, Chino Hills, Diamond Bar, Los Serranos, San Dimas and Rancho Cucamonga. The list is based on the business's location and the usual service radius for window cleaning. Confirm your address is covered when you call.

KnockOutCleaners has a rating of 5.0 from 35 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

Call KnockOutCleaners on (909) 402-0314. The business is at 4370 Holt Blvd, Montclair, CA 91763. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.