How Much Does an Interlock Driveway Cost?

If you’re considering installing an interlock driveway, one of the first questions homeowners ask is:

“How much does an interlock driveway cost?”

As a landscape contractor installing driveways across Newmarket, Aurora, Bradford, and King City, I’ve installed hundreds of interlock projects. The cost can vary depending on the size of the driveway, the preparation required, and the materials used.

In this guide, I’ll break down the real costs, what affects the price, and what homeowners should watch out for when choosing a contractor.

Average Cost of an Interlock Driveway

In our experience installing driveways throughout York Region and Simcoe County, the average cost of an interlock driveway is about:

$20 per square foot installed

This price typically includes:

• Excavation

• Base preparation

• Paver installation

• Edging

• Polymeric sand

• Final compaction

Of course, the final price will depend on the size and complexity of the driveway.

Typical Driveway Size and Total Cost

Most residential driveways we install fall between 600–800 square feet.

Here’s what that usually looks like in terms of price:

Driveway Size	Estimated Cost
600 sq.ft	~$12,000
700 sq.ft	~$14,000
800 sq.ft	~$16,000

These estimates assume standard excavation and base preparation.

How We Properly Install an Interlock Driveway

A driveway that lasts 20+ years starts with the correct installation process.

At Edens Sprinklers & Landscape Design, our process includes:

1. Excavation

We excavate the driveway area approximately 12 inches deep to ensure the proper foundation.

2. Base Installation

We install 8 inches of 3/4” crushed gravel for the structural base.

To prevent settling, we compact the base every 3 inches during installation.

3. Leveling Layer

We add 1 inch of HPB (High Performance Bedding) to create a perfectly level surface for the pavers.

4. Paver Installation

The interlock pavers are installed in the desired pattern and tightly fitted.

5. Edge Restraints

We install concrete or aluminum edging to lock the driveway in place and prevent shifting.

6. Polymeric Sand

We use G2 polymeric sand, which hardens between the joints to prevent weed growth and movement.

7. Final Compaction

The driveway is compacted one final time to ensure everything is locked in and level.

Factors That Can Increase the Cost

Not every driveway project is the same. Some conditions can increase the price.

One of the most common cost factors we see is:

Old Asphalt Removal

Many homes already have an existing asphalt driveway. Before installing interlock, the asphalt must be:

• Removed

• Disposed of

• Re-excavated to proper depth

This adds extra labour, equipment time, and disposal costs.

The Biggest Mistake Homeowners Make

One of the most common mistakes homeowners make when installing an interlock driveway is:

Choosing the cheapest quote.

Lower quotes often mean shortcuts are taken in the installation process.

Common issues we see include:

• Not excavating deep enough

• Poor base preparation

• No proper compaction

• Cheap materials

• No edge restraints

These shortcuts can cause a driveway to sink, shift, or fail within just a few years.

A properly installed interlock driveway should last 20–30 years or more, so choosing the right contractor is critical.