Interlock paving is one of the most popular exterior projects in the GTA. This thread covers 2026 costs and what separates quality installations from failures.
Driveway Costs
Concrete interlock: $20-$40/sq ft installed. Typical 2-car driveway (600 sq ft): $12,000-$24,000. Natural stone (granite setts): $35-$70/sq ft. Tumbled/antiqued finishes add $3-$8/sq ft.
Pathway and Patio Costs
Front walkway (30-50 sq ft): $2,500-$6,000. Backyard patio (200-400 sq ft): $6,000-$16,000. Full package (driveway + walkway + patio): most popular GTA exterior refresh combination.
Why Base Preparation Is Everything
Ontario freeze-thaw will heave improperly prepared interlock within 3-5 years. Proper installation requires 8-10 inch excavation depth, compacted granular base, bedding sand, and edge restraint. Contractors skipping base preparation are the biggest source of interlock complaints in the GTA.
LF Builders has completed 30,000+ interlock projects in 50+ years: https://lfbuilders.ca
Share your interlock project and contractor review at https://home.renovation.reviews