Does Ottawa require a site plan approval for a patio over 65 square metres?

Great question, and it's one that catches a lot of Ottawa homeowners off guard. Site plan control in Ottawa is primarily aimed at commercial, institutional, and multi-residential developments — for the vast majority of single-family residential patio projects, site plan approval is not required regardless of size. However, there are still important regulatory considerations that apply to larger patio installations that you need to understand before breaking ground.

What does apply to residential patios in Ottawa is zoning compliance — specifically lot coverage limits and setback requirements. Every residential property in Ottawa has a maximum lot coverage percentage defined by its zoning designation, and a large patio over 65 square metres could push you closer to or over that limit depending on how much of your lot is already covered by the house, garage, sheds, and other structures. You can look up your property's zoning and lot coverage rules through the City of Ottawa's GeoOttawa mapping tool or by calling 3-1-1. Setbacks from property lines also apply — most Ottawa residential zones require structures and hard surfaces to maintain a minimum distance from the side and rear lot lines, though the specifics vary by zone.

A ground-level paver patio sitting on a granular base generally does not require a building permit in Ottawa, regardless of its size. That said, if your patio project includes any structural elements — a pergola with footings, a covered outdoor kitchen structure, steps with retaining walls over 1 metre, or any raised platform over 24 inches above grade — those elements trigger permit requirements under the Ontario Building Code. It's worth thinking of the patio surface itself and any attached structures as separate regulatory questions.

One important exception worth flagging: if your property is in a heritage conservation district such as the Glebe, New Edinburgh, Sandy Hill, or Rockcliffe Park, changes to the exterior of your property including visible hardscaping may require a Heritage Permit through the City's heritage planning division. Similarly, properties adjacent to NCC-managed land or parkways may have additional review requirements.

For a patio in the 65-plus square metre range, the practical steps are straightforward — confirm your lot coverage allowance through GeoOttawa, verify your setback requirements, and check whether any structural elements attached to the patio trigger a building permit. If you're on a corner lot, near an easement, or in a heritage area, those add layers worth confirming with the City before you start. If your project is complex enough to involve retaining walls, structural features, or significant grading changes, connecting with an experienced patio contractor through the Ottawa Construction Network directory at justynrookcontracting.com/directory can help you navigate the planning side alongside the construction.