Building permits in Ajax

Ajax requires a building permit for decks/platforms more than 0.6 m above grade or when attached to another structure.

Ajax requires a permit for a detached shed over 15 m², more than one storey, attached to another structure, non-ancillary storage use, or with plumbing.

Ajax explicitly lists basement finishing among construction that requires a building permit.

Ajax explicitly lists additional dwelling units and retrofit additional dwelling units among construction requiring a building permit.

Ajax explicitly lists additions to a building among construction requiring a building permit.

Ajax requires permits for regulated interior work including enlarged openings, reinsulation, plumbing alterations, heating/duct changes and structural work; minor finish work depends on scope.

Ajax explicitly lists removal of a load-bearing wall and enlarged openings among work requiring a building permit.

Ajax’s current Fence By-law requires a swimming-pool enclosure permit before excavating or erecting a privately owned outdoor swimming pool or ornamental pond; the application form also covers hot tubs.

Ajax requires a permit for attached garages/carports of any size and detached garages/carports or roof structures over 10 m²; exact configuration determines the result.

Ajax explicitly lists plumbing additions/alterations and changing the heating system or ductwork among permit-required construction, while the exact trade authority depends on the work.

Ajax’s current Fence By-law sets residential fence height/placement rules and a separate swimming-pool enclosure permit, but does not treat every ordinary fence as a building-permit project.

Ajax explicitly lists a retaining wall greater than 1 m in height among construction that requires a building permit.

Ajax explicitly requires a building permit for demolition of a structure greater than 10 m².