Interlocking in Kanata: Patios, Walkways, Driveway Extensions and Repairs

Interlocking in Kanata covers four kinds of work: backyard patios, front walkways and steps, driveways and driveway extensions, and repairs to interlock that has settled or heaved. Kanata adds a fifth variable, which is age. The first street in Beaverbrook was built in 1964, and building has carried on ever since, so the interlock here is in every stage of life, from first-generation driveways in Bridlewood and Morgan’s Grant that are now twenty or thirty years old, to patios on lots that were sod a couple of summers ago.

Here is how each kind of project goes, what changes from one part of Kanata to another, and what the City allows on the part of your front yard that is its land.

The ground decides the build

Interlock rarely fails at the paver. It fails in the base underneath, and the base has to suit the soil it sits on. Kanata has three quite different kinds of ground.

Beaverbrook, Glen Cairn and Katimavik. The older neighbourhoods from the 1960s and 1970s have settled soil and mature trees. The ground is stable. The constraint is roots: City-owned trees are protected, private trees can be protected under the Tree Protection By-law, and the City’s rules keep new hard surfaces in the right of way out of a tree’s critical root zone. On these lots the design often bends around a tree rather than through it, and some excavation is done by hand.

Bridlewood, Morgan’s Grant, Kanata Lakes and the newer subdivisions. Most of Kanata’s lots from the 1980s onward were graded with compacted clay fill under a thin layer of topsoil. Clay holds water, and water held under a patio or driveway freezes and lifts it. Fill keeps settling for years too, worst of all in the strip against the foundation where the builder backfilled.

Kanata North, near the Carp Hills. North Kanata sits beside the South March Highlands at the southern tip of the Carp Hills, a ridge of Precambrian rock. On lots near it, bedrock can be much closer to the surface than a design assumes. That can change the finished grade, the base design or the drainage plan, and it is better found with a test hole than halfway through the dig. Our guide to excavation in Kanata, Stittsville and Nepean covers what we do when we hit it.

The Interlocking Concrete Pavement Institute’s minimum, over well-drained soil, is 4 inches of compacted aggregate base for a patio and 6 inches for a residential driveway (ICPI Tech Spec No. 2). Most Kanata soil is not well drained, so we treat that as a floor. Our specification is at least 8 inches of compacted Granular A under a patio and 10 to 12 inches under a driveway, with geotextile fabric between the clay and the stone. The reasoning is in our guide to patio base depth and Ottawa’s freeze-thaw cycle.

Interlock patios

Most Kanata backyard patios we build replace something: a deck at the end of its life, a cracked concrete pad, or first-generation interlock that has settled into waves. The design questions are the same ones that apply anywhere in the west end:

• Size it from the furniture, with room to pull out chairs and walk behind them, not from the leftover space.
• Keep the swale open. Subdivision lots drain along swales at the rear and side lot lines, and the City’s Landscaping Education Guide says hard landscaping must not alter grading and drainage patterns. The patio slopes away from the house and toward the swale, never over it.
• Measure the back door. A walkout or raised main floor changes the design. Above 600 mm, you need a guard and a landing, which our deck or patio guide explains.
• Plan the gas, power and sleeves before the base goes down, not after.

The layouts that work on compact subdivision yards, from full-width patios to L-shapes and separate fire-pit pads, are set out in our guide to patio design in Stittsville. The lots and houses there were built the same way in the same years as Kanata’s. For the bigger picture of how a Kanata yard gets zoned, see landscape design in Stittsville and Kanata.

Walkways and front steps

A front walk and steps are the most visible interlock on the property, and the most used. Two sets of rules apply.

Steps are a structure. The City’s guide says stairs and landings that provide access to a building can need a building permit, and that even when no permit is required, the rise and run of steps, handrails, guards and landing sizes must meet the Ontario Building Code. The steps in the photo above are built from solid interlock block units on a compacted base, with a railing anchored into the structure, not screwed to the top of a paver.

The front of the lot may be City land. The strip between your property line and the road is City right of way, and its size varies. The City’s geoOttawa map shows roughly where it is. There, the only hard surfaces allowed are a driveway and a walkway, together no more than 50 per cent of the frontage. One walkway can be added without a permit if it is no wider than 1.8 m, stays out of any tree’s critical root zone, sits at least 1.8 m from the driveway, 1 m from infrastructure and 0.6 m from a fire hydrant, does not cross a ditch, does not change the sidewalk or curb, and ends at the sidewalk.

Walkway materials and step details are covered in our guide to stone walkways and front steps in Ottawa.

Driveway extensions and new driveways

A common Kanata request is widening a single driveway with an interlock strip on one or both sides, or replacing tired asphalt with interlock outright.

Replacing like for like. The City’s guide says an access permit or road cut permit is not needed to resurface a driveway or change its material, as long as its size and slope do not change. Asphalt out and interlock in, on the same footprint, is the simplest driveway project there is.

Extending by up to 1.8 m. An extension can usually be added without a permit if it meets every condition on the City’s list. The extension:

• is not wider than 1.8 m
• keeps the driveway and any walkway, together, within 50 per cent of the frontage
• is not asphalt
• is not in the critical root zone of a tree
• is at least 1 m from infrastructure such as hydro poles, transformer boxes and Canada Post mailboxes
• is at least 1.5 m from a fire hydrant and 0.3 m from the neighbour’s property
• does not cross a ditch or change the sidewalk or lowered curb
• ends at the sidewalk, if there is one.

The “not asphalt” condition is why interlock borders and extensions are so common on Kanata streets. On private property, Kanata sits outside the Greenbelt, so most lots fall in the area where the Zoning By-law caps a driveway at 50 per cent of the lot width. Confirm your street’s area on Schedule A1 of the by-law before you design to that number.

Widening by more than 1.8 m needs an access permit and a road cut permit. One more thing to know before you widen: under the City’s rules a driveway is not automatically a parking space. It has to lead to one. If the goal is a place for a second car, check with a City Development Information Officer first.

A driveway is built differently from a patio, with thicker pavers and a deeper base, and the part in the right of way has to be built to City standards. Our guide to interlock driveways in Ottawa covers the design and build in detail, and the interlock driveway cost guide explains the price.

Repairing older Kanata interlock

A good share of the interlock work in Bridlewood, Morgan’s Grant, Kanata Lakes and Katimavik is repair. The usual symptoms, and what they usually mean:

Usually a repair. A strip settled along the garage or the foundation where backfill has consolidated. One wheel track rutted while the rest is flat. A border that has spread because the edge restraint failed. Joint sand washed out, with weeds and ants moving in. A section lifted for a utility repair and put back badly. In each case the pavers come up, the base is corrected and compacted, the same pavers go back down and the joints are refilled with polymeric sand.

Usually a rebuild. The whole surface rolls. Water sits on it after rain or runs toward the house. Once the pavers are lifted, the base turns out to be a few inches of stone dust laid straight on clay. Relaying pavers over a base like that buys two or three winters. The lasting fix is excavation to proper depth, fabric and new granular base compacted in lifts, and often the original pavers cleaned and reused.

Our interlock repair guide goes through each symptom in more detail, from frost heave to efflorescence and salt damage.

What interlocking costs in Kanata

Ottawa landscapers publish installed prices across a broad band. Allen Landscaping puts economy work at $18 to $22 per square foot, mid-range at $25 to $35 and premium above $45, and notes that most high-quality projects land in the mid-to-high $30s. Driveways sit toward the upper end because of the thicker paver and deeper base. On a Kanata lot, the biggest swings within the band come from tear-out of the old surface, base depth for clay fill or rock, access for equipment into a fenced backyard, and the paver line. The interlocking patio cost guide shows how to read a quote line by line, and the Ottawa hardscaping cost guide prices steps, walls and walkways alongside it.

Choosing an interlock contractor in Kanata

1. Ask to see the licence. Since March 1, 2026 the City of Ottawa has required a hardscaping contractor licence for anyone who installs or reconstructs patios, walkways, steps, driveways or walls. That includes repairs. We hold an active one.
2. Get the base in writing: depth in inches, material named, fabric or not. “Proper base” is not a specification.
3. Get the paver named: manufacturer, line and thickness. We are TechoPro certified and a Techo-Bloc authorized contractor, a Permacon installer partner, and our crew is Unilock trained.
4. Ask who books the locates. Provincial law requires utility locates through Ontario One Call before any digging.
5. Ask about the street end. A contractor who does not mention the right of way, the 50 per cent rule or the 1.8 m limits has not read the City’s guide.

Our guide to hiring a hardscaping contractor in Ottawa covers quotes, deposits and red flags in more depth.

Interlocking for your Kanata home

We work Kanata on a weekly rotation, from Beaverbrook and Glen Cairn to Bridlewood, Morgan’s Grant and Kanata Lakes. The full service is on our hardscaping page, and the local detail is on our Kanata hardscaping page. For how Kanata’s older and newer lots change the whole hardscape job, read hardscaping in Kanata.

Book a free on-site estimate. We will measure, dig a test hole, tell you honestly whether you need a repair or a rebuild, and send a written, fixed-price scope inside five business days.