Brampton’s published rule turns on both attachment and height. A deck or porch attached or anchored to the house requires a building permit, and a detached structure also requires one when it is 0.6 metres or more above ground.
Zoning should be checked before the framing layout is finalized. Property lines, setbacks, permitted encroachments, easements, grade, and the relationship to existing doors and windows can affect the location and size.
Enclosing a porch or adding a sunroom changes the scope. Foundation, structure, roof, glazing, insulation, drainage, and heating or ventilation information may be required depending on whether the space is open, enclosed, or conditioned.