Window & Door Replacement Toronto & GTA
Toronto homes lose up to 30% of their heat through old windows. Optima installs Energy Star certified windows and doors across the GTA — backed by a 25-year warranty, with up to $5,000 in government rebates to help cover the cost.
Get Your Free Quote
No obligation. Response within 24 hours.
"Optima Windows and Doors has built a reputation as one of the GTA's most trusted window and door installers — with over 10,000 homes upgraded and a near-perfect customer rating."
"Beginning with Chris from Sales to Ben from installation, my experience with Optima has been excellent! The product is excellent and the attention to detail shows."
"I am confidently giving Optima a 5 star rating on managing this project with precision timing, excellent workmanship and value for the money!"
"Comparing my last year energy bills to this year, it's a phenomenal difference. I only paid $10 for AC comparing to $159 last year!"
Watch Our Work in Action
See real window and door installations from Toronto homeowners
Real Installations Across Ontario
Over 1,300 completed projects across 30+ communities in Ontario. Every pin on this map is a real Optima installation. Find your neighbourhood below.
Toronto Core
Hamilton & Niagara
25-Year Warranty
Fully transferable coverage on glass, frames, hardware, and installation
Window Wise Certified Installers
Factory trained and Window Wise certified installation teams for guaranteed quality
Clean Job Site
We leave your home cleaner than we found it. Guaranteed.
On-Time Installation
We show up when we say we will or your install is discounted
Certifications & Memberships
Recognized by Canada's leading industry organizations
Why Toronto Homeowners Choose Optima
Why we're the top-rated window installation company in Toronto
Why Toronto Homeowners Choose Optima
Premium quality window installation backed by German engineering and Canadian craftsmanship
Energy Star Certified
Cut your heating bill by up to 30%. Optima windows carry the 2026 Energy Star Most Efficient designation — the highest rating available.
25-Year Warranty
Every window we install is backed for life — glass, frames, and workmanship. No fine print, fully transferable if you sell.
Built in Toronto
We build your windows in our own Toronto facility. No distributors, no markups — you pay direct from the source.
Our Crew, Your Home
Your project is handled by our own trained crew, start to finish. We never send subcontractors into your home.
Premium Windows & Doors Collection
Every window and door we install is built to handle Ontario's winters — from -30°C cold snaps to summer humidity.
Entry Doors
Front doors built for Canadian winters. Steel and fiberglass options with multi-point locking — secure, tight-sealing, and draft-free.
View Entry Doors →
Patio & Sliding Doors
Open your home to the backyard with doors that slide smoothly and seal tightly. Triple-pane glass available for year-round comfort.
View Patio Doors →Get an Instant
Window & Door
Cost Estimate
Answer a few quick questions about your home and get a realistic price range in under 2 minutes. No signup. No obligation.
- ✓Takes less than 2 minutes
- ✓Covers windows, doors, and full-home projects
- ✓Includes rebate and financing guidance
- ✓No personal details required to see results
Window Replacement Guides & Resources
Make informed decisions with our comprehensive guides covering everything from glass packages to energy efficiency and modern design trends.
- Triple Pane vs Double Pane Windows: Which Is Better for Ontario? Energy
- Soundproof Windows: Complete Noise Reduction Guide Noise Control
- Black Windows: Complete Guide for Modern Ontario Homes Design
- Steel vs Fiberglass Doors: Which Is Right for Your Home? Doors
- Egress Windows in Canada: Size Requirements & Building Codes Safety
Affordable Window Replacement Financing
New windows should not mean emptying your savings. We offer flexible monthly payments and help you claim every rebate you qualify for — so you get the best windows for the least out of pocket.
Monthly Payments
From $49Approval in minutes. Start your project with $0 down.
Government Rebates
Up to $5,000Optima is an approved installer. We handle every form for you.
Our Window Installation Process
Most Toronto homeowners go from first call to finished install in under 4 weeks
Free Consultation
In-home assessment and precise measurements by our experts.
Custom Quote
Transparent pricing with no hidden fees. Financing options included.
Your Windows Are Built
We custom-build each window to your exact measurements at our Toronto facility — typically ready within 2–3 weeks.
Same-Day Installation
Most homes are done in a single day. Our crew handles everything — including full cleanup. You just enjoy the results.
Frequently Asked Questions
Answers to what Toronto homeowners ask most before getting started
How much does window replacement cost in Toronto?
Window replacement costs typically range from $400 to $1,200 per window depending on size, style, and glass package. Triple pane windows cost 15-25% more but offer superior energy efficiency. We offer free quotes and financing from $49/month.
What is the best window type for Canadian winters?
Triple pane windows with Low-E coating and argon gas fill are ideal for Ontario winters. Energy Star certified windows can reduce heating costs by up to 30%.
How long does window installation take?
Professional window installation typically takes 30-60 minutes per window. A full home with 10-15 windows can usually be completed in 1-2 days by our certified installers.
Are there government rebates for windows in Ontario?
Yes! The Canada Greener Homes Affordability Program offers up to $5,000 for energy-efficient window upgrades. Optima is an approved installer and handles all rebate paperwork.
Window & Door Installation Across the GTA
Serving 25+ cities across Southern Ontario with free in-home consultations
Homeowner Knowledge Hub
Read before you buy — real guidance on costs, glass types, energy savings, and what to watch out for when hiring a contractor
Window Pricing Guide
How to budget for window replacement costs in Brampton and the GTA.
Read Guide →Choosing a Window Company
What to look for when selecting a window replacement contractor.
Read Guide →Office Location: 5343 Dundas St West, 6th floor #9, Etobicoke, ON M9B 6H8, Canada | (647) 800-6973
