How Much Does Interlock Cost in Ottawa? 2026 Price Guide

If you collect three quotes for an interlock project in Ottawa this year, you will probably get three very different numbers — sometimes $10,000 apart for the same driveway. This guide gives you the real 2026 ranges we see across hundreds of Ottawa projects, the five things that move a price up or down, and the one question that exposes every lowball bid.

2026 Ottawa interlock prices, by project

Project	Typical range (installed)	Common total
Driveway (2-car, ~600 sq ft)	$28 – $42 / sq ft	$17,000 – $25,000
Patio (300–500 sq ft)	$30 – $45 / sq ft	$12,000 – $18,000
Front walkway + steps	$25 – $38 / sq ft	$4,000 – $9,000
Relevel / repair sunken area	Fraction of replacement	$1,500 – $6,000
Restoration (wash + re-sand)	$3 – $6 / sq ft	$1,000 – $3,000

These are honest Ottawa ranges for properly engineered work — full excavation, compacted HPB base, geotextile, polymeric sand, written warranty. You can find cheaper. What you cannot find is cheaper with the same base, and the base is the part that decides whether the surface survives its fifth winter.

The five things that move your quote

Base depth. Driveways need 12 inches of excavation in Ottawa clay. A quote that is $4,000 cheaper is often just 4-6 inches shallower — you are buying the same driveway, twice.
Paver line. Techo-Bloc, Permacon, Unilock and Oaks entry lines versus architectural lines can differ $4-$8 per sq ft on material alone.
Borders and inlays. A soldier-course border adds material and cutting time, but it is the highest-value visual upgrade per dollar.
Access. A backyard patio with no machine access means hand-carrying base material — real labour hours.
Demolition. Removing old asphalt or concrete adds haul-away and dump fees. It should always appear as a line item, never a surprise.

The one question that exposes a lowball bid

Ask every contractor the same question: "Write down my excavation depth and base material." A legitimate quote says "12 inches, HPB limestone, compacted in 4-inch lifts." A lowball quote goes vague — "standard base," "industry spec." The excavation line is where cheap bids hide, because it is the most expensive step and the one you will never see once the pavers are down.

What a fixed-price quote should include

Excavation depth and base material, in writing
Paver manufacturer and line name
Edge restraint type (concrete haunch or aluminum)
Demolition, haul-away and dump fees
Polymeric sand and cleanup
Workmanship warranty term — ours is 12 years on settling and heaving

Want a real number for your address? We do free on-site estimates across Ottawa with an itemized fixed-price quote within one business day. Request yours here.

FAQ

Cost Questions.

Straight answers before you book. Don't see yours? Call (343) 998-8316.

What is the average cost of an interlock driveway in Ottawa in 2026?

Most Ottawa interlock driveways cost $28-$42 per square foot installed. A typical 600 sq ft two-car driveway totals $17,000-$25,000 with full 12-inch base, borders and polymeric sand.

Why is one interlock quote so much cheaper than another?

Almost always base depth. A quote thousands cheaper usually means 4-6 inches of excavation instead of 10-12, or skips geotextile and compaction lifts. Ask each bidder to write down the excavation depth and base material.

Is interlock worth it compared to asphalt?

Asphalt costs less up front (roughly half) but typically needs replacement in 10-15 Ottawa winters and cracks at the edges within five. Properly based interlock lasts 25+ years and single pavers can be replaced. Over the driveway lifecycle the costs converge — and interlock resells better.

Do you charge for estimates?

No. Site visits and itemized fixed-price quotes are free across Ottawa, with a response within one business day.

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How Much Does Interlock Cost in Ottawa? (2026 Guide)