5 Things to Know Before Pouring a Concrete Driveway in the GTA

A new concrete driveway is one of the best investments you can make in a GTA home. It adds curb appeal, holds up better than asphalt in the long run, and adds real value to your property. But pour it wrong — or at the wrong time of year — and you’ll be repairing it within a few seasons.

Here’s what every GTA homeowner needs to know before the truck shows up.

1. Timing Is Everything — Pour Between May and October

Ontario’s freeze-thaw cycle is brutal on fresh concrete. If concrete cures while temperatures are dropping below 5°C, the water inside the mix freezes before the concrete reaches full strength. The result: cracking, spalling, and a driveway that looks 10 years old after its first winter.

The safe window in the GTA runs from mid-May through mid-October. Even in early spring, ground temperatures around Brampton and Mississauga can still be cold enough to cause problems below the surface. Most reputable contractors won’t pour after the first serious frost warning — and if one offers to pour your driveway in November without mentioning cold-weather precautions, walk away.

If you’re committed to a fall pour, ask specifically about heated blanket curing. It’s doable, but it adds cost and requires careful monitoring.

2. Ontario’s Frost Depth Requires Proper Sub-Base Preparation

The GTA’s design frost depth is roughly 1.2 to 1.5 metres, depending on the municipality. That means the ground beneath your driveway freezes deep every winter, then thaws in spring. If the sub-base isn’t compacted properly, that movement will crack your slab.

A standard residential driveway in Toronto, Oakville, or Burlington should have at minimum 6 inches of compacted granular base (Granular A or Granular B, to Ontario Provincial Standards). Some contractors cut corners with recycled fill or uncompacted material — this is where cheap jobs fall apart within two or three years.

Before concrete is placed, walk the sub-base. It should feel firm underfoot with zero give. If it bounces or shifts when you step on it, it needs more compaction or additional material.

3. Concrete Thickness Matters — 4 Inches for Passenger Vehicles, 6 for Heavy Use

Standard residential driveways are poured at 4 inches thick. That’s enough for passenger cars and light SUVs under normal conditions. If you’re regularly parking a pickup truck, a contractor’s work vehicle, or a loaded trailer, go to 6 inches.

In the GTA, where many homeowners have oversized garages or use their driveway for contractor parking, it’s worth the modest upcharge to go to 6 inches across the full slab rather than just the apron. The extra material cost is small — concrete is priced by the cubic yard — and the durability difference is significant.

For the mix itself, specify a minimum 32 MPa (4,500 PSI) air-entrained concrete for any exposed driveway in Ontario. The air entrainment creates tiny bubbles in the mix that give it room to expand and contract through freeze-thaw cycles. Don’t let anyone talk you into a lower-strength mix to save money — it will cost you more in repairs.

4. Permits and Requirements Vary by Municipality

This surprises a lot of homeowners: in many GTA municipalities, replacing or extending a driveway requires a permit or at minimum approval from the City.

• Toronto: Driveway widening beyond a certain percentage requires a permit. There are also rules about impermeable surface coverage on a lot.
• Mississauga: New driveway construction typically requires a Road Occupancy Permit if the contractor needs to use the boulevard or sidewalk area.
• Brampton: Similar permit requirements apply, especially if you’re connecting to a curb cut or changing the driveway’s footprint.

Your contractor should be pulling the appropriate permits as part of the job. If they’re not, that’s on you if the city flags it. Always ask: “Are permits included, and who is responsible for pulling them?“

5. Budget $8 to $15 Per Square Foot — and Know What That Covers

A straightforward concrete driveway replacement in the GTA currently runs $8 to $15 per square foot, fully installed. A typical double-car driveway is 500 to 600 square feet, putting the all-in cost at $4,000 to $9,000 depending on complexity, thickness, and finish.

What moves the number up:

• Stamped or exposed aggregate finish: Add $3–5/sqft
• 6-inch slab instead of 4-inch: Add roughly $1–2/sqft
• Significant excavation depth: Varies, especially if old cracked slabs need removal
• Drainage grading work: Essential in low spots — budget $500–1,500 extra if the driveway doesn’t sheet properly to the street or a catch basin

On the drainage point: every driveway needs to slope away from the house (minimum 1–2% grade toward the street) and away from the neighbour’s property. Poor grading is one of the most common complaints after driveway pours. Make sure it’s in writing before the job starts.

Ready to Get Started?

Our Homecrete division handles residential and commercial concrete in the GTA, including driveways, sidewalks, and exposed aggregate work. We use proper sub-base preparation, air-entrained mixes rated for Ontario winters, and we pull all required permits.

If you’re sourcing materials for a contractor or self-managing a build, visit our supplies page for ready-mix concrete, granular base materials, and everything else you need for a driveway done right.

Questions before you book? Contact us — we’re happy to walk through your project before any money changes hands.