Plan the stages separately
The published period is not the whole project.
Ottawa publishes an approximate first review of 5 business days for detached garage and shed applications under the enhanced service level.
Official sources behind this page
Small one-storey detached garageMay be permit-exempt below 15 m²
Ottawa states that qualifying one-storey detached accessory buildings ancillary to the principal dwelling can be exempt when under 15 m² and without plumbing.
City of OttawaDetached garages and sheds · Garage threshold, documents and first-review target
2026-10-01Open proof
Larger accessory buildingPermit required
Accessory buildings outside the exemption require a building permit under the City’s published guidance.
City of OttawaDetached garages and sheds · Garage threshold, documents and first-review target
2026-10-01Open proof
ZoningStill applies
Ottawa directs owners to confirm setbacks, height and lot coverage with Development Information.
City of OttawaDetached garages and sheds · Garage threshold, documents and first-review target
2026-10-01Open proof
Need the full project answer?
The main guide keeps the permit trigger, zoning questions, documents, fees, timing and next steps together.
Open the garage / carport guide