Glass Is the First Thing Customers See. Make It Invisible.
Professional interior and exterior window cleaning for storefronts, office buildings, schools, and churches — squeegee-finished glass, detailed frames and tracks, and recurring routes that keep it that way.
Dirty glass reads as neglect faster than almost anything else on a commercial property, because customers look through it every time they walk in. KCS cleans windows the professional way: strip washers and squeegees with pure-water rinse where appropriate, detailing of frames, sills, and tracks, and screen cleaning — not a spray bottle and paper towels that push dirt into the corners and leave lint on the glass. Water-fed pole systems with purified water let us reach upper floors on low- and mid-rise buildings safely from the ground, leaving glass to dry spot-free without ladders against your facade.
Most clients put glass on a recurring route — monthly storefront service, quarterly full-building interior and exterior — because frequency is what keeps glass looking managed rather than periodically rescued. We also handle one-time work: post-construction glass detail with careful razor technique that respects tempered glass and coatings, hard-water stain removal from sprinkler overspray, and pre-event or pre-inspection cleanups.
Window service integrates naturally with our janitorial contracts — interior glass on the nightly scope, full exterior on a scheduled cycle, one vendor and one invoice. KCS is licensed, bonded, and insured, and serves storefronts, offices, schools, and churches across the East Bay, Tri-Valley, San Francisco, Solano County, Sacramento, and the Central Valley.
What's Included
Interior & Exterior Service
Both sides of the glass, plus frames, sills, tracks, and screens — the full assembly, because clean glass in a grimy frame still looks wrong.
Water-Fed Pole Reach
Purified-water pole systems clean upper-story exterior glass from the ground — spot-free drying, no ladders on your storefront, no lift rental for mid-rise work.
Recurring Routes
Weekly, monthly, or quarterly schedules sized to your visibility needs — storefronts usually monthly, offices typically quarterly.
Hard-Water Stain Removal
Mineral deposits from irrigation overspray and runoff removed with polishing compounds before they permanently etch the glass.
Post-Construction Glass Detail
Stickers, paint, silicone, and debris removed with correct razor and solvent technique that protects coatings and tempered glass.
One-Vendor Integration
Bundle window routes with your janitorial or floor-care contract — one walkthrough, one schedule, one invoice.
How It Works
- 1
Glass Count & Walkthrough
We count panes, note access and height, check frame and track condition, and flag hard-water damage.
- 2
Flat Quote & Frequency
You get a fixed per-service price and a recommended frequency based on exposure and visibility — not a package upsell.
- 3
First Full Detail
The initial service is the thorough one: glass, frames, sills, tracks, screens, and any stain correction needed to reach baseline.
- 4
Recurring Route Service
Scheduled visits maintain the standard, with interior work timed around your business hours and exterior work around weather.
- 5
Condition Reporting
We flag failing seals, cracked panes, and etching when we see them — you hear about small glass problems before they become replacements.
Window Cleaning FAQs
How much does commercial window cleaning cost?
Pricing follows pane count, accessibility, height, and frequency, so we do a walkthrough or review photos first, then quote a flat per-service price. Recurring routes price lower per visit than one-time cleans.
How high can you go?
Ground-level through mid-rise using water-fed poles and interior access. We are straightforward about our limits: true high-rise rope-access work is not our lane, and we will say so rather than improvise on your building.
How often should storefront glass be cleaned?
Customer-facing storefronts look best on monthly or even biweekly service; office buildings typically run quarterly exteriors with interior glass handled by the janitorial scope. Exposure to traffic film and sprinklers can shorten that.
Can you remove hard-water spots that regular cleaning won't touch?
Usually, yes — mineral deposits respond to polishing compounds if caught before they etch the glass. Long-neglected staining can become permanent etching, which is why we flag it early on route accounts.
Do you clean interior glass during business hours?
We can, quietly, or after hours with our night crews — most offices prefer the latter. Storefront exteriors are typically done early morning before opening.
Are you insured for this work?
Yes — licensed, bonded, and insured, with certificates available for your property management file before the first service.
Free walkthrough · Flat quote
Ready to talk about window cleaning?
Tell us about your building and we'll schedule a free walkthrough — then send a flat, no-surprises quote.