Retaining Wall Contractor in Toronto

Retaining wall contractors in Toronto get hired to hold back soil; the good ones get hired to manage water. Soil pressure is predictable, it’s the water trapped behind a wall with no drainage that cracks, bows, and topples it. Every wall we build stands on a compacted base, drains through clear stone and a perforated pipe, and uses geogrid reinforcement where height demands it.

Walls we build

• Segmental block (Unilock, Permacon, Oaks): the workhorse for grade changes and terracing
• Armour stone: big, sculptural limestone, popular for ravine lots and front yard grade drops
• Natural stone garden walls: dry-laid or mortared, for beds and borders
• Tie wall replacement: rotting timber walls removed and rebuilt to last

When a wall needs an engineer

Anything retaining over a metre gets engineered, that’s both the rule and good sense. We coordinate the engineer, build to the stamped drawing, and photograph the drainage and geogrid before backfilling so you have proof of what’s behind the wall. Shorter garden walls don’t need stamps, but they get the same base and drainage discipline.

Toronto conditions

East-end clay holds water against walls longer than sandy soils do, which makes the drainage layer non-negotiable, not an upgrade. On ravine and walkout lots we also plan around conservation authority setbacks before anyone digs. Walls pair naturally with patio terracing and front steps on sloped lots.

Frequently asked questions

How much does a retaining wall cost in Toronto?

Segmental block walls typically run $40 to $75 per square face foot installed; armour stone runs $50 to $100+ depending on stone size and access for the excavator. A 30-foot, 3-foot-high garden wall commonly lands between $5,000 and $10,000.

Does my wall need an engineer or permit?

In Toronto, walls retaining over 1 metre generally need engineering, and walls near property lines or driveways can trigger permits regardless of height. We tell you at the assessment whether your wall crosses that threshold and coordinate the engineering when it does.

Why do retaining walls fail?

Water. Walls rarely get pushed over by soil alone, they fail when water builds up behind them with nowhere to go. Every wall we build gets clear-stone backfill and a drainage pipe at the base, plus geogrid layers on taller walls. That is the difference between 5 years and 50.

Can you replace a leaning wooden tie wall?

Yes. rotting railway-tie and timber walls from the 80s and 90s are one of our most common replacements. We remove and dispose of the timber, cut the grade back, and rebuild in block or armour stone.