Interlock fails in exactly one way around here, and it is never the stone. It is the base. Ottawa's freeze-thaw cycle works on whatever is underneath the pavers, and on the clay that most Manotick lots sit on, an under-built base will show you where it is by the second spring — settling at the garage apron, a dip where the walkway meets the step, edges that have started to wander. The stone will still be perfect. This page covers what interlock costs here and the handful of questions that separate a twenty-year installation from a two-year one.
When to book: Design conversations happen over winter; installation books up fast once the frost is out in April.
Manotick Gardens & Landscaping SuppliesSupport Local · ManotickIndependent
2709 River Rd, Manotick · Garden centre and landscape supply yard on River Rd in the village, trading since 2000. Warrantied interlock and flagstone installation and repair as well as materials. Hours are seasonal — call ahead in spring and late autumn.
Who we'd call first for this work in K4M — how we choose, and it's never for money.
If they're booked
The next two calls — same standard, next in line for the top spot. No business has paid to be here, or anywhere on this site. Location and credential facts come from each business's own public sources; how we check them. Know a business that belongs here? Tell us.
Support Local · Manotick means the business operates from K4M — a storefront, yard, office, or a documented owner or mobile base here — not that it merely covers the area (how we test it). Independent means locally owned rather than a chain or franchise.
manotick.co is a directory, not a party to any work. Every button above goes straight to the business; any quote, contract, warranty or dispute is between you and them. Confirm licence and insurance and get it in writing before work starts — terms.
Greely too. Greely (K4P) is eight kilometres east along Mitch Owens Road and on the same wells and septic; most of the businesses on this page serve it as well as Manotick — say "Greely" when you call and confirm any travel charge. For the trades with a yard or office in Greely itself, see contractors based in Greely.
Who is the best interlock company in Manotick?
Short answer: Interlock lives or dies on the base under it, so the thing to compare is the excavation and compaction the quote describes, not the stone. Manotick Gardens is the only one of the three in the village and warranties its own installations as well as selling the material. Stoneworks does relevelling and resanding, which is the cheaper fix on a settled patio. Silverstone is a Techo-Pro certified installer and NCMA certified for retaining walls, which is the credential that matters if yours holds back soil.
| Business | Based | Ownership | What sets them apart |
|---|---|---|---|
| Manotick Gardens & Landscaping Supplies | Manotick (K4M) | Independent | A garden centre and supply yard on River Rd in the village, trading since 2000, offering warrantied interlock and flagstone installation and repair as well as the materials. Hours are seasonal — call ahead in spring and late autumn. |
| Stoneworks Interlock | Gloucester | Independent | Gloucester-based. Interlock and patio installation plus paver relevelling and resanding — the cheaper answer on a patio that has settled rather than failed. |
| Silverstone Landscaping | Ottawa (no street address published) | Independent | Ottawa-based, Techo-Pro certified installer and NCMA retaining wall certified, WSIB compliant — the credentials to ask for on a wall that holds back soil. |
A comparison of the three businesses this site would call first, on facts each publishes about itself — not a ranking of every hardscape contractor serving K4M, and not a rating. "What sets them apart" is our opinion, formed from the criteria we publish. No business has paid for a place in this table, and payment would not change it. Confirm licence and insurance directly before you hire.
What interlock & hardscape costs in Manotick — 2026 rates
| Service or scope | Planning range |
|---|---|
| Interlock walkway or path | $25 – $35 / sq ft |
| Interlock driveway or parking court | $25 – $40 / sq ft |
| Natural flagstone (supply and install) | $35 – $55 / sq ft |
| Retaining wall (segmental block) | $60 – $120 / linear ft |
| Steps (per step, installed) | $400 – $900 |
| Lifting and relevelling settled interlock | $8 – $15 / sq ft |
| Polymeric sand re-sweep and seal | $2 – $4 / sq ft |
The base is the whole job
Ask any quote a single question — how many inches of compacted granular, and in how many lifts? On rural clay the answer you want is 8 to 12 inches, compacted in stages rather than dumped and rolled once. A suburban quote priced on 4 to 6 inches will be meaningfully cheaper and will not survive. The second question is edge restraint: the plastic or aluminium edging spiked around the perimeter that stops the field from spreading sideways under load. Leaving it out is invisible on day one and is the most common corner cut in this trade. If a quote is silent on both, it is a price for stone, not for a driveway.
Interlock, asphalt, or both
On the long driveways here the honest answer is usually both. Full interlock over 300 feet is a very large number; what most estate properties end up with is asphalt or tar-and-chip for the run and interlock for the parking court and the front entrance, where it is actually seen and where the design work pays for itself. Interlock's genuine advantage over asphalt is repairability: when a section settles, it is lifted, the base is corrected, and the same stone goes back down. Nothing about an asphalt patch is invisible.
Repair and relevelling
Settled interlock is usually worth lifting rather than replacing. A crew pulls the affected area, corrects and recompacts the base, and relays the original pavers — typically $8 to $15 per square foot, against $25 to $40 to build new. Budget for polymeric sand re-sweeping every few years; that is what keeps the joints locked and the weeds and ants out, and skipping it is how a sound installation starts looking tired.
Common questions
Who is the best interlock company in Manotick?
Interlock lives or dies on the base under it, so the thing to compare is the excavation and compaction the quote describes, not the stone. Manotick Gardens is the only one of the three in the village and warranties its own installations as well as selling the material. Stoneworks does relevelling and resanding, which is the cheaper fix on a settled patio. Silverstone is a Techo-Pro certified installer and NCMA certified for retaining walls, which is the credential that matters if yours holds back soil.
How much does interlock cost per square foot in Ottawa?
In 2026, an interlock walkway typically runs $25 to $35 per square foot installed, and a driveway or parking court $25 to $40. Natural flagstone is $35 to $55. Those figures assume a properly built base — a quote materially below them is usually pricing a thinner base.
Why does interlock sink or settle?
Almost always an inadequate base rather than a problem with the stone. On Manotick's clay you want 8 to 12 inches of granular compacted in lifts; a 4 to 6 inch suburban base will settle within a couple of freeze-thaw cycles, typically first at the garage apron. Missing edge restraint causes the field to spread sideways.
Can settled interlock be repaired without replacing it?
Yes, and it is usually the right call. The affected area is lifted, the base corrected and recompacted, and the original pavers relaid — roughly $8 to $15 per square foot against $25 to $40 for new. That repairability is interlock's main practical advantage over asphalt.
Should I do my whole rural driveway in interlock?
Rarely — the cost over a few hundred feet is very large. The common approach on estate lots is asphalt or tar-and-chip for the run and interlock for the parking court and entrance, where it is seen and where it earns its price.
Do I need a permit for interlock in Ottawa?
Not for replacing a surface in place. But creating a new entrance onto a City road needs an access permit under Ottawa's Access By-law 2026-139, which replaced the old private approach by-law in April 2026. The new by-law caps a driveway at 50 per cent of the lot frontage and allows modest expansion within that, so not every widening needs a permit now — but out here an entrance almost always involves a culvert, and a culvert means an application to the City and a real line item most quotes leave out. See the paving page.