Maintenance Plans
Never Worry About Dirty
Windows Again
Bi Annual
PER CLEANING
2 VISITS PER YEAR
- Free hard water removal
- 7 day weather warranty
Tri Annual
PER CLEANING
3 VISITS PER YEAR
- Free hard water removal
- 30 day weather warranty
- Free screen cleaning
Quarterly Protection Plan
PER CLEANING
4 VISITS PER YEAR
- Free hard water removal
- Unlimited weather warranty
- Free screen cleaning
- Free interior track detailing
Reviews
See What Your Neighbours Are Saying
Trusted by homeowners across Durham Region
Ready to Book?
Get Streak-Free Windows in Oshawa
Join hundreds of Oshawa homeowners who trust Mastery. Get your free, no-obligation quote today.
Our Services
SERVICES
Exterior Window Cleaning
Exterior Window Cleaning
Spotless exterior cleaning using pure water-fed pole systems and traditional mop & squeegee methods.
Interior Window Cleaning
Interior Window Cleaning
Streak-free interior cleaning. Smudges and buildup removed.
Track Cleaning
Track Cleaning
Tracks & sills deep-cleaned like new.
Gutter Cleaning
Gutter Cleaning
Clear clogged gutters. Protect your home from water damage.
Screen Cleaning
Screen Cleaning
Screens cleaned for better airflow and clarity.
Christmas Light Installation
Christmas Light Installation
Custom design, full install, takedown & storage — all included.
Serving All Oshawa Neighbourhoods
We clean windows throughout every part of Oshawa — on time, fully equipped, and ready to deliver results you'll notice from the curb.
North Oshawa
Windfields, Kedron, Taunton, Pinecrest, Samac, Northglen
Central Oshawa
Central, O'Neill, McLaughlin, Vanier, Eastdale
South Oshawa & Waterfront
Lakeview, Donevan, Farewell, Lakefront
East Oshawa
Donevan, Harmony, Eastdale
West Oshawa
Centennial, Westmount, Stevenson
What We Offer
- Exterior window cleaning
- Interior window cleaning
- Screen cleaning
- Hard water stain removal
- Post-construction window cleaning
Why Oshawa Homeowners Choose Mastery
Durham Region local.
We're not a franchise or a call centre operation. We're a Durham-based team that services Oshawa regularly and knows the city well.
Streak-free guarantee.
We use purified water-fed pole systems that leave every window spotless — no chemicals, no streaks, no callbacks.
Reliable and professional.
Uniformed technicians, on-time arrivals, and a team that treats your home with respect every visit.
Serving every part of the city.
From North Oshawa's newest subdivisions to South Oshawa's waterfront streets — we cover it all.
Easy booking.
Get a free quote online or by phone. We handle everything from there.
Why Oshawa Homeowners Choose Mastery
Fully Insured & WSIB Covered
Peace of mind before we step on your property.
400+ Five-Star Reviews
Trusted by hundreds of homeowners across Durham Region.
Satisfaction Guaranteed
Not happy? We come back and make it right — no questions asked.
Durham Region's Trusted Choice
Schedule Your Next
Window Cleaning Today!
Experience streak-free windows year round from a trusted local team
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