Greater Toronto Area
Your Garage Door. Fixed Right. Guaranteed for Life.
Professional garage door repair and installation across 25 cities in the Greater Toronto Area. We arrive within 30 minutes — and we stand behind every job for as long as you own your home.
30-Minute Arrival
Free on-site estimate, anywhere in the GTA
Lifetime Warranty
On all labour — for as long as you own the property
Price-Match Guarantee
Find a lower quote from a licensed competitor? We match it
What We Do
Every Garage Door Need, Covered
From a snapped spring to a full new installation, our certified technicians handle it all — with upfront pricing and no surprises.
Garage Door Repair
Broken springs, snapped cables, panels off track, sensors out of alignment — we diagnose the problem on the spot and fix it the same visit.
Garage Door Installation
Upgrading your door or starting from scratch? We supply and install residential and commercial garage doors built for Canadian winters.
Garage Door Openers
Noisy, slow, or completely dead — we install, repair, and replace all major opener brands. Smart-home compatible options available.
Why Choose Us
The Standard Every GTA Homeowner Deserves
We started Cornerstone Doors with one principle: do the job right, stand behind it completely, and charge a price that's fair. No bait-and-switch quotes. No hidden labour fees. No fine print on the warranty.
We show up fast.
Book a free estimate and our technician aims to arrive within 30 minutes — no multi-day waiting windows.
We stand behind our work.
Every repair and installation carries a lifetime warranty on labour. If our workmanship ever fails while you own the property, we fix it at no charge.
We match any price.
Bring us a written quote from any licensed, insured GTA garage door company for identical work — we'll match it, no questions asked.
Serving 25 Cities Across the GTA
From the City of Toronto to Burlington, Oshawa to Newmarket — if you're in the GTA, we come to you.
Ready to Get Started?
Book your free estimate online or call us directly. We'll have a technician at your door — often within the hour.
No obligation. No service fee. Just an honest assessment and a written quote.