How much for a driveway extension on my existing Ottawa apron?

Driveway extensions in Ottawa typically cost $2,000 to $6,000 depending on the size, material, and whether you need a new curb cut or permit. The key factor is whether you're widening within your existing curb cut or creating a new opening onto the street.

Understanding Your Existing Apron
Your driveway apron is the section between the sidewalk and street that sits within the municipal right-of-way. If you're extending your driveway width beyond your current curb cut opening, you'll need a permit from the City of Ottawa (call 3-1-1) and the work must meet municipal standards. The city controls this area because it affects drainage, snow removal access, and street infrastructure.

Extension Costs by Material
For a typical 100-200 square foot extension, expect to pay $8-12 per square foot for asphalt (including proper base preparation), $12-18 per square foot for interlock pavers, or $10-16 per square foot for concrete. These prices include excavation to proper depth, Granular B sub-base (minimum 300mm in Ottawa due to our 1.2-1.5 metre frost line), Granular A base (150mm), and surface material. Extensions on Ottawa's clay soils often require geotextile fabric between the subgrade and base to prevent soil migration.

Critical Ottawa Considerations
Your extension must handle the same brutal freeze-thaw cycles, snowplow traffic, and salt exposure as your main driveway. Skimping on base depth is catastrophic — extensions built with only 150mm of granular base will heave and separate from your existing driveway within 2-3 winters. The new section must be properly tied into your existing driveway and graded to direct water away from your foundation and neighboring properties.

Permit and Timing Requirements
If you're changing the curb cut width, expect permit fees of $200-400 plus inspection costs. The municipal apron work must be done to city specifications and inspected. Plan extensions for May through September when hot-mix asphalt can be properly placed and compacted. Extensions done too late in the season risk poor compaction as asphalt cools rapidly in Ottawa's fall temperatures.

When to Hire a Professional
Driveway extensions require precise excavation, proper base compaction in lifts, and seamless integration with existing surfaces. The base preparation is invisible once complete but determines whether your extension lasts 20+ years or fails within 5 years. Professional contractors have the plate compactors, rollers, and experience to build extensions that survive Ottawa's extreme climate.

Need help finding a driveway contractor? Ottawa Driveways can match you with local paving professionals for free estimates on your extension project.