PriceBee
Unit pricing

Window Replacement cost per window installed in Ajax

Window Replacement cost per window installed in Ajax, Ontario in 2026.

Low

C$585

Average

C$1,100

High

C$1,950

Ajax crews quote about C$585 – C$3,250 per window installed.

Multiply local unit rates by your real measurements.

What drives window replacement prices in Ajax

Local labor, permitting and climate move Ajax prices away from the national average.

Labor market

Skilled trades across Ajax are unionised or association-backed, and GTA labour rates run well above the North American average — expect quotes in Canadian dollars roughly 30% 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

Ajax 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

Ajax 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.

Ajax unit pricing by material

VinylC$585 – C$1,550
CompositeC$845 – C$1,950
AluminumC$650 – C$1,800
WoodC$1,050 – C$2,850
Wood with aluminum claddingC$1,250 – C$3,400
FiberglassC$1,150 – C$3,100

Ways to lower your Ajax price

  • 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.

Ajax questions

People also search: window replacement cost Ajax · window replacement near me Ajax · window replacement price per window installed Ajax · window replacement permit cost Ajax

Price my project in Ajax

Answer a few questions and we'll model a low, average and premium price for your postal code — then match you with accredited local pros.

Price my project