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Labor market

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

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

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.