
Built in Concord · Serving the GTA for 30 years
GTA HOMEOWNERS · LIMITED-TIME OFFER
ENERGY STAR Canada Participant windows, plus a free in-home estimate.
30 seconds
You send the form.
Tell us a little about your home. That's it.
Usually the same day
We call you.
A real person from our team books a time that suits you.
At your home
We measure.
Every window and door, with options explained side by side.
Your quote
You get an itemized quote.
No decision on the day.
No more cold spots by the glass, no drafts, and a house that feels warm right up to the window.
Energy-efficient vinyl frames built for Canadian winters. Move the couch back to the window.
Less street noise through the glass, and a calmer home.
Clean new frames and trim, inside and out. The kind of upgrade you notice every time you pull into the driveway.
Most window companies are dealers. With Alliance, you deal direct for straightforward pricing.
Installation is handled by Alliance’s team — never subcontractors.
More handoffs, and details can get missed.
One company from quote to finish.

We protect your floors, remove the old windows, install, seal and trim the new ones, and clean up before we leave.
Before
We protect your home.
Floors are covered before any work begins.
Remove
Out with the old.
Old windows are taken out and hauled away.
Install
Installed, sealed, trimmed.
Our own crew fits each window, then seals and trims it inside and out.
After
We clean up.
The work area is tidied before we leave.