Permits in King
When a backyard shed, deck, or fence needs a building permit in King, Ontario, with the size cut-offs, coverage level, and source link.
Coverage
Municipal rule
Shed
A building permit is required for accessory structures larger than 10 m2 (108 sq ft); smaller detached storage structures may be exempt if they have no plumbing, subject to zoning setbacks.
Deck
Decks more than 600 mm above grade require a building permit.
Fence
Fences do not require a building permit but must comply with the local fence by-law; pool enclosures require a permit.
The provincial baseline
Under the Ontario Building Code, a detached one-storey storage shed of 15 square metres (about 160 square feet) or less, with no plumbing, does not need a building permit. Anything larger, with plumbing, or attached to another building does. Zoning rules (setbacks, height, lot coverage) always apply even when no building permit is needed.
King permit questions
Do I need a permit to build a shed in King?
A building permit is required for accessory structures larger than 10 m2 (108 sq ft); smaller detached storage structures may be exempt if they have no plumbing, subject to zoning setbacks. Source: King building department, last checked 2026-07-03.
Do I need a permit for a deck in King?
Decks more than 600 mm above grade require a building permit.
Do I need a permit for a fence in King?
Fences do not require a building permit but must comply with the local fence by-law; pool enclosures require a permit.
Source
From King building department, last checked 2026-07-03. Permit fees: Fees and Charges Building Permit Fees Payment Options Payments can be made online through the CityView Portal account via credit or debit for invoices up to $10,000.00..
This is a plain-language explainer, not legal or professional advice, and not the bylaw itself. Rules change and vary by zone within a city. Always confirm with your municipality's building department and the linked official page before you build. Decks and sheds near a conservation authority's regulated area may need a separate permit.
Other municipalities: Aurora, East Gwillimbury, Georgina, Markham. Or see every municipality.