Interlock vs Stamped Concrete: 2026 Cost & Lifetime Comparison
"Interlock or stamped concrete?" is one of the two questions every homeowner in Hamilton, Burlington and Oakville asks when they're pricing a new driveway or patio. The honest answer changes depending on (1) what you're paving, (2) your subgrade and access, and (3) how long you plan to own the home. This guide compares the two head-to-head — install cost, ownership cost over 20 years, repairability, resale, and the situations where one clearly wins. No marketing fluff; just the math.
Install cost: 2026 head-to-head
For an apples-to-apples 2-car driveway (~500 sq ft) in Hamilton, Burlington or Oakville:
| Surface | 2026 install range | Typical 500 sq ft job |
|---|---|---|
| Standard concrete (broom) | $14–$22 / sq ft | $7,000–$11,000 |
| Stamped concrete | $18–$28 / sq ft | $9,000–$14,000 |
| Mid-range interlock (Unilock or Techo-Bloc) | $28–$45 / sq ft | $14,000–$22,500 |
| Premium large-format pavers | $36–$55 / sq ft | $18,000–$27,500 |
Day 1 winner: stamped concrete. It's roughly 35–50% cheaper to install than interlock. That's the entire reason it shows up in every "what's cheaper?" comparison. But install cost is one of three numbers that matter — the other two are repair cost and lifetime cost.
20-year total cost of ownership
Here's where the comparison flips. Over 20 years on a typical Hamilton or Burlington 2-car driveway:
| Cost item | Stamped concrete (20 yrs) | Interlock (20 yrs) |
|---|---|---|
| Initial install (500 sq ft, mid-range) | $11,500 | $18,000 |
| Resealing (every 2–3 yrs at $1,200–$2,000) | $8,000–$15,000 | $0 |
| Polymeric sand top-up (every 5–7 yrs) | $0 | $1,200–$2,400 |
| Crack repair / pattern matching | $2,000–$5,000+ (often visible after repair) | $400–$1,200 (lift & reset, invisible repair) |
| Major surface refresh at year 15–20 | Likely partial replacement: $5,000+ | Top-coat re-sand: $800–$1,500 |
| 20-year total estimate | $26,500–$36,500+ | $20,400–$23,100 |
Interlock starts more expensive and ends cheaper. The reseal cycle on stamped concrete is the silent killer — most homeowners skip it for the first 5 years, the colour fades, and then they're paying for an "overlay" that's effectively a partial install. See why Ontario concrete cracks for the freeze-thaw side of the math.
Repairability: when something breaks
Both surfaces eventually need attention. The repair experience is very different.
- Interlock: Damaged paver? Lift it, replace it, re-sand the joints. The repair is invisible if the matching pavers are still in stock (usually yes for jobs less than 8–10 years old). Settlement in a section? Lift the affected pavers, top up base, re-lay. Total job: half a day to a day.
- Stamped concrete: A cracked slab can't be lifted. The repair options are: epoxy-fill the crack (cosmetically OK, structurally fine, but the colour rarely matches); saw-cut and re-pour a section (visible joint forever); or full overlay. Pattern matching after 5+ years is hard because original colour-release tones fade and overlays often look "patchy."
For Hamilton and Halton clay subgrades specifically, the freeze-thaw cycle moves the ground roughly 25–75 mm per winter. Interlock flexes with that movement; rigid stamped concrete cracks at its weakest point.
Ontario freeze-thaw & salt performance
Ontario sees 60+ freeze-thaw cycles per winter and heavy de-icing salt use. Both materials handle it — differently.
- Interlock: Designed for it. The joints are the flex points. Polymeric sand stays activated through 15+ winters with proper install. Salt resistance is excellent on EnduraColor (Unilock) and ColourFinish (Techo-Bloc) surfaces.
- Stamped concrete: Vulnerable on two fronts — salt scaling on the surface, and crack propagation from freeze-thaw if joints aren't cut at 10x10 ft. The cure-and-seal protects the colour for 2–3 years; after that, surface wear from salt is visible. Calcium chloride is gentler than rock salt for the first winter.
Aesthetic differences
- Interlock reads as "real materials." Each unit is its own piece, joints are visible, the surface has texture and depth. Premium Unilock and Techo-Bloc lines (Beacon Hill, Richcliff, Borealis, Industria) compete with natural stone.
- Stamped concrete reads as "decorative concrete that mimics stone." Done well it's beautiful and consistent. Done cheaply it screams "stamp." The pattern is visible the moment you know what you're looking at, which some buyers love and others find off.
- Resale photo test: in side-by-side MLS photos, premium interlock generally photographs more luxe than stamped concrete in the same price tier. Stamped concrete in the $7K range looks like a $7K install; interlock in the $14K range looks like a $14K install.
Resale impact in Halton
Real-estate agents in Burlington, Oakville and Hamilton consistently report (anecdotally and per HomeStars / Houzz 2025 surveys) that paver-driveway homes show better in the $1.2M+ market and recover roughly 70–90% of their hardscape investment at sale. Stamped concrete recovers 50–70%. The gap is largest in Oakville's Glen Abbey, Bronte, and Eastlake; smaller in newer Milton and Burlington Alton Village subdivisions where buyers are more price-sensitive on hardscape.
Which one wins by use case
- Tight budget, planning to sell within 5–7 years: Stamped concrete wins. You won't pay the resale-cost premium of interlock; you'll capture most of the install savings.
- Forever home, 15+ year horizon: Interlock wins on math. Lower lifetime cost, better repair experience.
- Pool deck: Interlock wins decisively. Slip resistance, replaceable units around chemicals, no surface seal-fade.
- Curb appeal in $1M+ market: Interlock or premium stamped — rarely budget stamped.
- Heritage Hamilton or Burlington property: Natural-stone or large-format premium interlock; stamped reads as "modern" and clashes.
- Tight access / small lot: Stamped concrete wins on labour cost where the bobcat doesn't fit.
- Steeper grade or visible slope: Interlock easier to grade-match without forming complex steps.
Getting an honest quote on either
An honest quote on either surface itemizes excavation, base, reinforcement (concrete) or geotextile + edge restraint (interlock), the surface material, the finish work, and the warranty. If a quote is a single number with no line items, it's not a quote — it's a guess. Seven Stones Landscape installs both: ICPI-certified interlock and 4000 PSI air-entrained stamped concrete, all with a written 5-year workmanship warranty. We'll tell you honestly when stamped concrete is the right call (and when it isn't) on your specific lot. Request a free on-site quote and we will measure, walk through both options, and give you written numbers for each within 3 business days.