Window cleaner squeegeeing commercial storefront glass in the Greater Seattle area

Window cleaning

Commercial Window Cleaning in Seattle, Bellevue & Tacoma

Interior and exterior window cleaning for storefronts, office buildings, dealerships, clinics, and multi-tenant properties — including hard-water and construction-debris removal, on a schedule that survives Pacific Northwest weather.

97.23%

Client retention

10+ Years

Cleaning Puget Sound facilities

11 Minutes

Avg. customer response time

Insured

Licensed, bonded, COI on request

In this climate, glass is the first thing customers judge you on.

Puget Sound weather is unusually hard on commercial glass. Constant rain carries road film and pollen down the face of a building, sprinkler overspray leaves mineral spotting that hardens into the surface, moss and algae take hold in shaded frames, and grey overcast light makes every streak and every water spot visible from the sidewalk. A storefront that has not been cleaned in two months does not read as dirty to your customer — it reads as a business that is not paying attention.

Cascade Clean Group cleans glass on a schedule that matches the weather rather than a generic quarterly default. Storefronts and entry glass on the busiest corridors get frequent service so fingerprints and rain film never accumulate. Full interior and exterior cleans handle frames, sills, tracks, and mullions, because glass that is clean with a dirty frame still looks unfinished. Where mineral deposits have already etched in, we use dedicated hard-water restoration rather than pretending a squeegee will lift it.

We are licensed, bonded, and insured, our crews are our own background-checked employees, and certificates of insurance go to your property manager on request. 97.23% of our clients stay on month-to-month terms, and your account manager answers in about 11 minutes when a client tour or an inspection just got scheduled.

Why businesses switch

Why building owners keep us on a glass schedule

01

Frames, sills, and tracks are part of the job

Most low bids clean the glass and leave the frame. We wipe frames and mullions, vacuum and detail tracks and sills, remove cobwebs from corners and light fixtures near the entry, and clean both sides of entry doors including push plates and handles. That is the difference between glass that is technically clean and an entrance that looks maintained. Interior partition glass, sidelights, and conference room walls get the same treatment, including fingerprint and adhesive-residue removal at door height.

02

Hard-water, mineral, and construction debris removal

Sprinkler overspray, irrigation, and runoff deposit calcium and silica that bond to glass and will not come off with soap. We use dedicated mineral removal and, where appropriate, fine polishing compounds to bring the surface back, then advise on head redirection so it does not return next quarter. We also handle post-construction glass: stucco splatter, paint specks, concrete slurry, adhesive, and label residue, scraped and detailed with the correct technique so the coating survives the process.

03

Safe, insured access up to low- and mid-rise heights

Interior and ground-level exterior work is standard. Above that we use poles, water-fed pole systems, and ladder or lift access appropriate to the elevation and the site, with the safety practices and insurance coverage a property manager should be asking every vendor to prove. We are licensed, bonded, and carry general liability and workers' compensation, and we will tell you plainly when a building needs a high-rise rope-access specialist instead of quoting work we should not be doing.

What our window cleaning service includes

Scope is set on site by pane count, elevation, access method, and glass condition. Window cleaning is available as a one-time service, on a recurring schedule, or bundled into a recurring janitorial program with interior glass handled on regular visits.

  • Exterior window and storefront glass cleaning
  • Interior window and partition glass cleaning
  • Entry door glass, both sides, including push plates and handles
  • Frame, mullion, and casing wipe-down
  • Sill and track vacuuming and detailing
  • Screen removal, cleaning, and reinstallation
  • Cobweb removal at entries, corners, and soffits
  • Fingerprint and smudge removal at door and desk height
  • Adhesive, tape, and label residue removal
  • Hard-water and mineral deposit removal
  • Glass polishing and restoration where appropriate
  • Post-construction paint, stucco, and slurry removal
  • Skylight and interior atrium glass where safely accessible
  • Glass display case and showroom glass detailing
  • Mirror and elevator glass cleaning
  • Water-fed pole cleaning for upper low-rise elevations
  • Ladder and lift access as site conditions require
  • Purified-water and low-residue solutions to reduce spotting
  • Drop cloths and floor protection at interior work areas
  • After-hours and pre-open scheduling for retail and clinics
  • Recurring monthly, quarterly, and semi-annual schedules
  • Multi-site and portfolio coordination on one invoice
  • Certificates of insurance provided to landlords and managers
  • Photo documentation of completed work on request
Streak-free interior glass office partitions in a commercial building

How often should commercial windows be cleaned?

In this climate, exterior glass gets dirty faster than most owners expect. These are the intervals we recommend across Seattle, Bellevue, and Tacoma properties.

IntervalBest fitWhat is covered
Weekly to biweeklyHigh-traffic storefronts, restaurants, grocery, clinics with street frontageEntry glass and ground-level exterior panes plus door glass and handles, cleaned before opening.
MonthlyRetail centers, dealerships, banks, fitness facilities, medical buildingsAll accessible exterior glass, entry systems, and frames, with interior lobby glass included.
QuarterlyProfessional offices, low-rise multi-tenant buildings, apartment common areasFull interior and exterior cleaning with frames, sills, and tracks detailed.
Twice per year or annuallyWarehouses, light-industrial facilities, and buildings with limited public frontageComprehensive interior and exterior service, plus mineral removal where deposits have built up.

How it works

From first call to first cleaning

  1. 1

    Request a walk-through

    Send the address and the building type. We can often scope small storefronts from a site visit the same week.

  2. 2

    We respond fast

    Average response time on a new inquiry is 11 minutes during business hours, and we set the visit on that call.

  3. 3

    On-site assessment

    We count panes, note elevations and access methods, check for mineral etching and construction residue, and confirm your operating hours.

  4. 4

    Written quote and schedule

    You get a fixed price per service, the recommended interval, the access plan, and proof of insurance — in writing.

  5. 5

    Service and inspection

    Crew cleans on schedule, details frames and tracks, and confirms the result with your on-site contact. Photo documentation on request.

Service area

Window cleaning across Seattle, Bellevue & Tacoma

Cascade Clean Group is locally owned and has cleaned Puget Sound facilities for more than ten years. Crews are dispatched across Seattle Bellevue Tacoma & surrounding cities, so your account is managed by people who can be at your building the same day.

  • Seattle
  • Tacoma
  • Bellevue
  • Kent
  • Everett
  • Renton
  • Federal Way
  • Kirkland
  • Auburn
  • Redmond
  • Sammamish
  • Lakewood
  • Shoreline
  • Olympia
  • Lacey
  • Puyallup
  • Gig Harbor
Commercial office building interior serviced by Cascade Clean Group

Google reviews

Reviews from Puget Sound facilities

5.0 average from 3 Google reviews
Read them on Google
“Mark and his crew do a great job for our senior center. I highly recommend them.”

Rick Weir

Senior center · September 2026

“We've been using Cascade Clean Group to for a little over a year and have been very happy with their service. They are efficient, punctual, and have accommodated all of our needs. Would highly recommend!”

Stride Logistics

August 2026

“Cascade Clean Group has been an important part of keeping Tacoma Little Theatre clean and sparkling for the last two years. They are quick to answer any questions we have and do a fantastic job maintaining our bathrooms, carpeting, and windows. We'd definitely recommend them!”

Chris Serface

Tacoma Little Theatre · August 2026

Instant estimate

Estimate your window cleaning

Glass is priced per pane rather than by square footage. Count each window or storefront panel once.

5 panes
550+

Count each window or storefront panel once — we confirm the count on site.

Glass to clean

Access / height

How often

Estimated project range

$110–$150

Single scheduled visit, no recurring contract.

Starting range — confirmed after a free walk-through.

Send this estimate to our team and we'll confirm the exact price.

Or call (253) 271-4050 — we answer.

We give away one free deep clean every week. See if you qualify.

FAQ

Commercial window cleaning questions, answered

Make the first impression the clean one.

Request a free walk-through. You get a pane count, an access plan, a fixed per-service price, and an interval that keeps your glass ahead of Pacific Northwest weather.