Best Window & Door Installation Contractors in Thornhill, ON
1 window & door installation contractors found in Thornhill
Lilikam Corporation
Thornhill, ON
Ratings aggregated by AI and may contain inaccuracies.
How much does window & door installation cost in Thornhill?
Most Canadian homeowners pay $600-$1,600 per replacement window installed - a standard vinyl or casement unit - and $2,200-$4,500 for a typical entry or patio door. Budget vinyl retrofits start near $450 a window and basic steel entry doors near $1,500; specialty bay or bow windows and premium fibreglass or French doors run $7,000-$8,500. Replacing every window in an average detached house typically lands at $12,000-$22,000.
In Thornhill, ON, typical quotes often come in a little below the Canadian average, so the table below shades these national figures down by roughly 5-10%.
What moves the price: The low end is a budget vinyl retrofit window or a basic steel entry door; the top end is specialty bay or bow windows, premium fibreglass or French doors, and whole-home replacements.
| Project | Typical cost in Thornhill |
|---|---|
| Standard vinyl replacement window (retrofit / insert) | $650 $400 to $1,100 per window |
| Casement or awning window | $1,100 $775 to $1,500 per window |
| Bay or bow window (multi-panel, installed) | $3,700 $2,300 to $8,000 per unit |
| Whole-home window replacement (~10-window detached house) | $14,000 $8,000 to $21,000 per project |
| Steel entry door (installed) | $2,000 $1,400 to $3,300 per door |
| Fiberglass entry door with sidelights (installed) | $4,200 $2,700 to $7,500 per door |
| Sliding patio door (2-panel, installed) | $2,400 $1,500 to $4,300 per door |
| French or garden patio door (installed) | $3,700 $2,300 to $6,500 per door |
What changes the price of window & door installation in Thornhill
- Retrofit vs. full-frame install: a retrofit (insert) fits a new window into the existing frame and is cheapest; a full-frame or brick-to-brick replacement rips out the whole old frame and typically adds $400-$600+ per window, but it's necessary when the frame is rotten or you're changing the opening size.
- Frame material and glazing: vinyl is the budget choice, while hybrid, fiberglass, aluminum-clad and wood cost more. Triple-pane glass, low-E coatings and argon/krypton gas fills raise the price up front but lower heating and cooling bills.
- Size, shape and panel count: large picture windows, custom or arched shapes, bay/bow units, and multi-panel patio or French doors cost far more than a standard rectangular opening.
- Door add-ons: sidelights, transoms, decorative or privacy glass inserts, multi-point locks and smart locks can easily double the price of an entry door.
- Access and site conditions: second-storey windows, tight access, rotten or out-of-square framing, and structural work to widen an opening all add labour hours.
- Order size: replacing 8-10 windows in one visit spreads the crew's setup and travel cost across the job, so the per-window price usually drops versus a single-unit swap that carries a minimum trip charge.
How window & door installation prices vary across Canada
Big cities cost more. Toronto and Vancouver run roughly 10-20% above the national average on both labour and installed pricing; the gap is widest on specialty work - bow windows are quoted at $4,500-$8,500 in Toronto versus a $3,300-$4,700 national norm. Calgary, Ottawa and other major metros sit modestly above national. Small-town and rural areas are at or slightly below national on the base price, but remote sites may add a travel surcharge.
These are typical Thornhill-area price ranges based on 2026 Canadian market data, not quotes. Your actual cost depends on the size and details of your project. Post your project on Bidmii to get free quotes from the 1 window & door installation contractor listed in Thornhill above.
Frequently Asked Questions about Window & Door Installation in Thornhill
How much does window & door installation cost in Thornhill?
The cost of window & door installation services in Thornhill, ON varies depending on the scope of work. Post your project on Bidmii to receive free, competitive quotes from local professionals.
How do I find a licensed window & door installation contractor in Thornhill?
Browse our directory of window & door installation contractors in Thornhill above. Look for contractors with the Verified badge, which means their identity has been confirmed. You can also check ratings aggregated from multiple platforms.
How many window & door installation contractors are in Thornhill?
Bidmii currently lists 1 window & door installation contractor in Thornhill, ON. Our directory is growing — create a free listing if you're a contractor.
Is it cheaper to replace all my windows at once?
Usually, yes. Doing 8-10 windows in a single visit spreads the setup and travel cost across the whole job, so the per-window price is often lower than a one-off swap. A full detached home typically runs $12,000-$22,000 installed.
What does labour alone cost, separate from the window or door?
Labour for a straightforward window swap is roughly $150-$350 per window. A patio door swap in an existing opening runs about $500-$1,200 in labour. Full-frame replacement, upper floors, or repairing rotten framing push those numbers higher.
Are there rebates for energy-efficient windows and doors in Canada?
Often. Federal and provincial energy programs and some local utilities periodically offer rebates for ENERGY STAR-rated windows and doors, though the specific programs and amounts change from year to year. Check which programs are currently open in your province before you buy, since a rebate can offset a meaningful chunk of the cost.