About Us
BUILT FROM THE GROUND UP.
BUILT FOR DURHAM REGION.
Our Story
MASTERY WINDOW CLEANING
SINCE 2023
- Founded in 2023 in Durham Region
- Started as a solo operation — grew one clean at a time
- Now a full team serving Ajax, Pickering, Whitby, Brooklin, Oshawa, Courtice & Bowmanville
- 1,500+ homes serviced and counting
Mastery Window Cleaning was founded in 2023 with a simple observation — Durham Region deserved a better window cleaning experience. No shortcuts. No mediocre results. Just honest, professional service done right, every single time.
Starting from scratch, we built Mastery from the ground up — one customer, one clean, one five-star review at a time. What began as a solo operation has grown into a full-service home maintenance company serving Ajax, Pickering, Whitby, Brooklin, Oshawa, Courtice, and Bowmanville.
Our Standard
WHAT MASTERY MEANS TO US
- Same standard of care on every job — big or small
- Quality work and clear communication from first contact to finish
- We don't hide from problems — we fix them
The name isn't accidental. Mastery means never settling for good enough — showing up to every job with the same standard of care, the same attention to detail, and the same commitment to leaving that property better than we found it.
From day one, our goal has been straightforward: give every customer the best possible experience through quality work and clear communication.
That standard drives every decision we make — how we hire, how we train, how we communicate, and how we handle the rare moments when something doesn't go perfectly. We don't hide from problems. We fix them.
Our Growth
A COMPANY THAT GREW WITH ITS CUSTOMERS
- Started with window cleaning — mastered it first
- Expanded only when we could do it exceptionally well
- Now also offering Christmas light installation
We started with window cleaning — laser focused on doing it better than anyone else in the region. Over time, as trust deepened, we expanded to meet what homeowners were actually asking for. Today we also offer professional Christmas light installation — the same quality-first approach, applied to a completely different service.
Every service we've added has been intentional. We don't offer anything we can't do exceptionally well.
Service Plans
RECURRING SERVICE PLANS
One of the things that sets Mastery apart is our recurring window cleaning service plans. Most companies show up once and move on. We built something different.
Durham Region weather is hard on glass. Pollen in spring, humidity in summer, leaves in fall — windows get dirty fast. A single annual clean doesn't cut it.
Customers choose a schedule that fits their home. We handle it from there — no reminders, no rescheduling. It just happens.
Choose a recurring schedule — we handle everything from there. No reminders needed.
Recurring customers get
- Priority scheduling over one-time bookings
- Consistent results from a team that knows your home
- A property that looks well-maintained year-round
- Never have to think about it — we handle it
Our Team
NOT A ONE-MAN OPERATION ANYMORE
- Trained technicians with defined roles
- Every tech held to the same professional standard
- Show up uniformed, communicate clearly, deliver results
- 400+ five-star reviews across Durham Region
Mastery isn't a one-man operation anymore. We've built a growing team with real structure — trained technicians who know what they're doing, and a support system behind them that keeps every job running smoothly.
We're not the biggest company in Durham Region. But we're focused on being the best one — and our 400+ five-star reviews suggest we're on the right track.
Why Mastery
WHY DURHAM REGION HOMEOWNERS
CHOOSE MASTERY
Quality above everything.
We don't cut corners. Every job is done to a standard we're willing to put our name on.
Communication that actually works.
Appointment confirmations, arrival windows, follow-ups, and fast replies — always.
Recurring service plans.
We're not just a one-time clean. We're a long-term partner in keeping your property looking its best.
400+ five-star reviews.
Our reputation in Durham Region speaks for itself.
100% satisfaction guarantee.
If something isn't right, we make it right. Every time.
Fully insured and professional.
Every technician is trained, uniformed, and fully insured.
Local and invested.
We built this business in Durham Region. This community is our home.
Durham Region's Trusted Choice
Schedule Your Next
Window Cleaning Today!
Experience streak-free windows year round from a trusted local team
Get My Free Quote