Window Replacement cost in Markham, ON
Markham homeowners typically pay $615 – $2,050 for window replacement. Local labor and materials price 37% above the national average.
Markham average
$1,150
Typical low
$615
Typical high
$2,050
Per window installed
$615 – $3,450
Sample ZIP
L3R
What drives Markham pricing
Local labor
Skilled trades across Markham are unionised or association-backed, and GTA labour rates run well above the North American average — expect quotes in Canadian dollars roughly 37% higher than the US benchmark once exchange and local wages are factored in. Winter shuts down much exterior work, so the spring-to-fall window is the busiest and priciest.
Permits & code
Markham issues building permits through its municipal building department under the Ontario Building Code. Electrical work needs an ESA (Electrical Safety Authority) notification and inspection, gas work must be done by a TSSA-certified installer, and HVAC changes should be sized by an HRAI-trained contractor. New-home and major-renovation work may fall under Tarion warranty coverage, and lots near a river or ravine can require Conservation Authority approval before the city will issue a permit.
Climate & conditions
Markham has a cold continental climate with freeze-thaw cycles, heavy snow load and humid summers. Expect frost-depth footings, ice-and-water shielding on roofs, insulation upgrades to meet Ontario energy requirements, and exterior work scheduled between April and November.
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Estimated project cost
$7,380 – $16,200
Most homeowners pay around $11,790
Compare frame material
Cost by material in Markham
Installed Markham pricing per window installed.
| Option | Installed cost |
|---|---|
| Vinyl | $615 – $1,650 |
| Composite | $890 – $2,050 |
| Aluminum | $685 – $1,900 |
| Wood | $1,100 – $3,000 |
| Wood with aluminum cladding | $1,300 – $3,550 |
| Fiberglass | $1,250 – $3,300 |
Where the money goes in Markham
A typical $1,150 Markham project, broken down by line item.
- Windows (material)60% · $690
- Labor28% · $322
- Trim, caulk & finish8% · $92
- Disposal & permit4% · $46
Common add-ons
Extras that show up on Markham quotes but rarely in the headline price.
Bay or bow window
Each
Egress window + well
Rotten frame or sill repair
Per opening
Exterior capping / trim wrap
Per window
Interior trim replacement
Per window
Permit
Ways to save in Markham
- Do the whole house at once — per-window labor drops sharply after the first few openings.
- Choose insert installs when the existing frames are sound; that alone saves 25–35%.
- Claim the 25C federal tax credit: 30% of cost, up to $600 per year for qualifying ENERGY STAR windows.
- Standard sizes and stock colors cost far less than custom shapes or dark exterior finishes.
- Buy in winter — window companies discount hardest in their slow season.
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