Scope before arithmetic
Make sure the fee belongs to your project.
Markham’s permit guidance also says attached decks require a permit. Zoning and applicable-law checks should happen before the permit application is prepared. If the deck location violates a zoning setback, a separate minor variance may be required even if the deck is building-permit exempt. Markham confirmed the under-50 m² residential small-scale fee classification on October 29, 2026.
Markham lists raised decks more than 24 inches above existing grade as requiring a building permit.
The City lists decks less than 600 mm above existing grade at all locations among housing projects that do not need a permit.
Markham directs applicants to confirm zoning and other applicable laws before preparing the permit application.
Official sources behind this page
Markham lists raised decks more than 24 inches above existing grade as requiring a building permit.
The City lists decks less than 600 mm above existing grade at all locations among housing projects that do not need a permit.
Markham directs applicants to confirm zoning and other applicable laws before preparing the permit application.
For a hypothetical residential deck/accessory structure under 50 m² requiring minor setback relief without change of use, Markham confirmed Residential Small Scale Development Standards (Table 7 item 7.1.2). The City’s 2026 listed fee is $2,942, separate from any building permit or zoning preliminary review fee.
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The main guide keeps the permit trigger, zoning questions, documents, fees, timing and next steps together.
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