What are the City of Ottawa rules for maximum driveway width on a residential lot?

The City of Ottawa limits residential driveway width to a maximum of 50 percent of your front yard width OR 8 metres, whichever is less. This means on a typical 15-metre frontage lot, your driveway can be up to 7.5 metres wide, but on a narrow 12-metre lot, you're capped at 6 metres.

The width restriction is measured at the front property line and applies to the total width of all paved surfaces — so if you have a circular driveway or multiple driveways, the combined width cannot exceed these limits. The City measures from the outer edges of any hard surfaces including asphalt, concrete, interlock pavers, or gravel that function as a driveway.

Double-wide driveways are popular in Ottawa but require sufficient frontage to stay within the 50 percent rule. A standard double-wide driveway is typically 6 to 7 metres wide to accommodate two vehicles side-by-side, which means you need at least a 12 to 14-metre lot frontage to comply. Many newer subdivisions in Barrhaven, Riverside South, and Kanata have 15 to 18-metre frontages specifically to allow double-wide driveways.

Heritage districts have additional restrictions. Properties in Ottawa's heritage conservation districts — including parts of the Glebe, Centretown, Sandy Hill, New Edinburgh, and Rockcliffe Park — may face stricter limits on driveway width, materials, and design. Some heritage areas restrict driveways to single-car width regardless of lot size to preserve the neighbourhood's historic character. Always check with the City's heritage planning department before widening a driveway in these areas.

Widening an existing driveway requires a permit if it changes the curb cut or driveway opening onto the municipal road. The driveway apron — the section between the sidewalk and road — sits within the municipal right-of-way and must meet City standards. Widening often requires relocating the curb cut, which involves municipal inspection and compliance with accessibility standards.

Lot coverage bylaws also apply. Beyond width limits, Ottawa's zoning bylaw restricts total impermeable surface coverage on residential lots. Driveways, walkways, patios, and roof area combined cannot exceed a certain percentage of your total lot area (typically 40 to 50 percent depending on the zone). Using permeable interlock pavers or permeable concrete can help maximize driveway area while staying within lot coverage limits.

Practical planning tip: Before widening your driveway, measure your frontage and calculate 50 percent to determine your maximum allowable width. Factor in the cost of curb cut modifications ($1,500 to $3,500) and permit fees ($200 to $500) when budgeting. Many Ottawa homeowners find that a well-designed single-wide driveway with a parking pad beside the house provides more usable parking area than a wide driveway that consumes the entire front yard.

Need help finding a driveway contractor to plan a compliant driveway expansion? Ottawa Driveways can match you with local paving professionals who understand City of Ottawa requirements and can handle the permit process.