Retaining Walls in Thornhill
Retaining walls that hold a slope, level a yard, and add usable space — built on a proper compacted base with drainage behind, so they stay straight for decades instead of bulging after a few winters. Segmental block or natural armour stone, finished with clean caps and backfill.
A local crew across all of Thornhill, from Old Thornhill to Royal Orchard — straddling Vaughan and Markham, handled by people who know the area.
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Wherever you are in Thornhill, our crew is local. We've worked properties across the city — including these areas:
What retaining walls in Thornhill looks like
A good retaining wall does quiet, important work: it holds back a slope, carves flat, usable space out of a hill, and keeps soil and water from ending up where you don't want them. On a Thornhill property with any grade to it, the right wall turns an awkward bank into a terraced garden, a level lawn, or room for a patio — and it does it looking like it was always meant to be there.
What separates a wall that lasts from one that leans is everything you can't see. We excavate to solid ground, build up and compact a granular base, and set the first course dead level — because every course above it depends on that one. Behind the wall we place drainage stone and pipe so water pressure can escape instead of pushing the wall forward, and on taller walls we tie geogrid back into the soil for reinforcement. It's the part nobody photographs and the part that matters most.
We build in segmental block or natural armour stone, finished with clean cap stones and proper backfill, and we handle the permits and engineering when the height calls for it. You get a written, measured quote before we start and a fully insured crew on site — so the wall protecting your Thornhill yard is built once, and built right.
Common questions about retaining walls in Thornhill
Quick answers to what Thornhill homeowners ask us most often.
How much does a retaining wall cost in Thornhill?
Retaining walls are priced by the face square footage and the material. In Thornhill, most residential walls land between $40 and $90 per face square foot installed — a low garden wall sits at the bottom of that range, while a taller wall that needs engineering and extra drainage sits at the top. We measure on site and send one written price with no surprises.
Do I need a permit for a retaining wall in Thornhill?
In Ontario, a retaining wall generally needs a permit once it's over about one metre (roughly three feet) tall, sits near a property line, or supports a driveway or structure — and taller walls can require an engineer's design. We flag the requirement up front and handle the paperwork so your wall is built to code.
What materials do you build retaining walls with?
Segmental block — the interlocking systems from brands like Unilock and Techo-Bloc — for a clean, modern look, or natural armour stone for a rugged, organic one. We'll recommend what suits your slope, your drainage, and the style of your Thornhill home.
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