Egress Window Installation in GTA
Ontario Building Code–compliant egress window installation across Toronto, Brampton, Mississauga, Vaughan, Markham & Oakville. Increase natural light, improve basement safety, and make your basement apartment legal — all with one upgrade.
Full cut-through installation on poured concrete or block foundations. We handle excavation, waterproofing, window well, and permit-ready finishing.
Make your basement suite legal under Ontario Building Code. Egress windows are mandatory for legal bedroom windows — we handle the full process.
Transform dark, damp basements into bright, livable spaces. Larger egress windows dramatically improve air quality and natural light.
Galvanized steel or concrete window wells with drainage, gravel beds, and optional covers — professionally installed to prevent water intrusion.
What Is An
Egress Window
& Why Do You Need One?
An egress window is a large opening window installed in a basement that meets minimum size requirements set by the Ontario Building Code — allowing occupants to escape in an emergency and emergency responders to enter.
If you have a basement bedroom, a basement apartment, or a secondary suite in the Greater Toronto Area, an egress window is not just recommended — it is legally required. The Ontario Building Code specifies minimum dimensions for egress windows in any sleeping room below grade.
Beyond legal compliance, egress windows bring transformative benefits to your basement: they flood the space with natural light, dramatically improve air circulation, and increase your home's resale value. GTA homeowners consistently report that egress window installation delivers one of the highest returns of any basement upgrade.
Ontario Building Code Minimum Requirement:
Egress windows must have a minimum unobstructed opening of 0.35 m² (3.8 sq ft), with no dimension less than 380 mm (15 inches). The sill height must be no more than 1,000 mm (39 inches) from the floor.
At Great Choice Construction, we've installed hundreds of egress windows across Brampton, Toronto, Mississauga, Vaughan, Markham, Oakville, and the surrounding GTA. Every installation is handled by our in-house crew — no subcontracting — and every job meets or exceeds Ontario Building Code requirements.
All Egress Window Services We Offer
From single window installations to full basement legalization projects — we handle every aspect of your egress window upgrade across the GTA.
Egress Window Installation
Full installation from concrete cutting to finished frame. We excavate, waterproof, frame, and install code-compliant egress windows in poured concrete and block foundations.
Window Enlargement
Existing small basement windows too narrow for code compliance? We safely widen existing openings without compromising your foundation's structural integrity.
Window Well Installation
Galvanized steel and concrete window wells with drainage gravel, ladder rungs for deep wells, and optional polycarbonate covers to keep water and debris out.
Waterproofing & Sealing
Improper egress window installation is the #1 cause of basement leaks. Every installation includes membrane waterproofing, hydraulic cement, and drainage-grade backfill.
Permit & Code Compliance
We handle permit applications and ensure every installation meets Ontario Building Code Section 9.7. Inspection-ready work with documentation provided at project close.
Basement Apartment Legalization
Turning a finished basement into a legal secondary suite? Egress windows are mandatory. We work with your timeline and local municipal requirements across all GTA cities.
Interior Finishing & Framing
After the window is installed, we frame the opening, insulate, and finish the interior surround so your basement looks as good as it performs.
Egress Window Replacement
Old egress windows that are drafty, cracked, or no longer code-compliant? We replace existing windows with energy-efficient, properly sealed modern units.
Free Site Assessment
Not sure what you need? Our crew will assess your foundation type, wall thickness, soil conditions, and local code requirements — completely free, no obligation.
Great Choice Construction's
Legacy:
Our commitment to you goes beyond installing a window. We educate, inform, and empower you to make the best decisions for your basement — and we stand by our work with a 100% satisfaction guarantee.
With over 20 years serving homeowners across the GTA, we've built our reputation one egress window at a time. Quality workmanship, honest pricing, and on-time project delivery — every time.
Every egress window installation is done by our own experienced team. No strangers on your property — just the same trusted crew, supervised by our project lead.
Cutting through a foundation requires precision. We assess wall thickness, rebar placement, and load paths before any concrete cutting begins.
We apply rubberized membrane, hydraulic cement, and drainage gravel on every installation — so your new window never becomes a source of basement water infiltration.
We pull required permits and ensure your egress window passes municipal inspection — protecting your home's resale value and your insurance coverage.
We will keep improving until you're completely happy with our work. That's our promise to every homeowner in the GTA — no exceptions.
How Egress Window Installation Works
From your first call to final inspection — here's exactly what to expect when you work with Great Choice Construction.
We visit your home, assess your foundation type and wall thickness, and provide a detailed written quote — usually within 48 hours.
We apply for the required building permit with your municipality — Toronto, Brampton, Mississauga, Vaughan, or Markham — handling all paperwork.
We excavate the exterior, mark rebar locations, and use a concrete saw to create your new window opening — safely and precisely.
The new egress window and window well are installed, sealed with membrane waterproofing, properly drained, and backfilled.
We schedule the municipal inspection, walk you through the completed work, and leave you with all permit documentation for your records.
Egress Window Size Requirements
Every egress window in Ontario must meet these minimum dimensions. Our installations always meet or exceed these requirements.
| Requirement | Minimum Standard |
|---|---|
| Unobstructed Opening Area | 0.35 m² (3.8 sq ft) |
| Minimum Width | 380 mm (15 inches) |
| Minimum Height | 380 mm (15 inches) |
| Maximum Sill Height | 1,000 mm (39 inches) from floor |
| Window Well Depth | Minimum 550 mm clearance |
| Ladder Requirement | Required if well depth > 900 mm |
Egress Window FAQ
Answers to the most common questions GTA homeowners ask us about egress window installation.
Egress Window Work Across The GTA
Explore our project gallery to see the precision and artistry in every egress window installation — showcasing the exceptional quality of Great Choice Construction's craftsmanship.
Brampton
Toronto
Mississauga
Vaughan
Egress Window Installation Across The GTA
We provide professional egress window installation services throughout the Greater Toronto Area and surrounding communities.
Ready For A Safe, Legal
Basement Window?
Get a free, no-obligation egress window installation estimate. We serve homeowners across Toronto, Brampton, Mississauga, Vaughan, Markham, Oakville, and the entire Greater Toronto Area. Same-week site visits available.
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