Armour Stone Walls and Landscape Features in Toronto
Armour stone is the heaviest material we install. Each block weighs 1,500 to 6,000 pounds. They go in with an excavator or a skid-steer, not a wheelbarrow, and once set they do not move for the next century. We install armour stone walls, garden borders, driveway edges, pond surrounds, and slope retention across Toronto and the GTA, drawing primarily from Owen Sound Ledgerock and Wiarton dolomite quarries within a few hours of the city. The look is unrefined on purpose: rough quarried faces, irregular edges, the kind of weight that makes a backyard read as part of the natural landscape rather than something dropped on top of it.
What armour stone actually is in Toronto
Armour stone is large quarried block. Ontario limestone, dolomite, or imported granite. The defining feature is mass. A typical residential armour stone runs 1,500 to 3,000 pounds. Large feature blocks reach 5,000 to 6,000. The Owen Sound Ledgerock and Wiarton dolomite quarries in Bruce County supply most of what we install. Grey-cream and warm tan are the dominant colour ranges. ASTM C568 covers limestone; ASTM C615 covers granite. Density is the engineering point. The stone holds back soil purely by its own weight, which is why armour stone walls skip geogrid, vertical anchors, and rebar entirely. Gravity does the work.
Where armour stone works in your landscape
Common applications across Toronto and the GTA:
- Gravity retaining walls. Up to 4 feet of retained height for residential, 6 feet with engineering. Slope holds, driveway cuts, terraced backyards.
- Garden borders and bed edges. Single-block low borders or two-course stacks defining planting areas.
- Water features. Pond surrounds, waterfall structures, stream beds. The mass keeps the pieces stable through frost cycles.
- Driveway and laneway edges. Stone “kerbs” along gravel or paver driveways. Doubles as snow shelf in winter.
- Slope erosion control. Hillsides where soil is washing out, stone pinned into the slope acts as anchor and visual feature simultaneously.
- Outcrop landscape features. Large single boulders set as accents, tied into planting and grade work.
Armour stone types, sizes, and surface finishes
Three dimensions cover almost every armour stone product order:
Small (1 ft × 2 ft × 1 ft). Roughly 200 to 400 pounds each. Border blocks, small accents, garden bed edging. Two people plus a hand truck on flat ground gets these in.
Medium (2 ft × 3 ft × 1.5 ft). 1,000 to 2,000 pounds. The standard residential armour stone. Most retaining courses and feature outcrops use this size.
Large (3 ft × 4 ft × 2 ft and up). 3,000 to 6,000 pounds. Feature blocks. Waterfall components. Excavator only, no exceptions.
Surface finish options:
- Quarried face. Raw natural cleavage from the quarry. Most rustic look. No two pieces alike.
- Split face. Mechanically split to expose a fresh stone face. More uniform than quarried.
- Sawn top, quarried face. Top sawn flat for stacking; vertical faces left rough. Best for stable walls.
Owen Sound Ledgerock gives warm tan to honey colours; Wiarton dolomite gives grey-cream. Imported granite is occasionally specified for a darker, more contemporary look but adds 30 to 50 percent to cost. We arrange product delivery from the quarry in our standard scope and can deliver loose stone to your site if you prefer a self-install on the small sizes.
How we install armour stone in Toronto
The process is straightforward but mechanical:
1. Site assessment. We look at access, slope, drainage, what the wall has to retain, surcharge from above (driveway? deck?). Equipment access is the first variable to confirm — a 20-ton excavator needs a path in.
2. Excavation. Down to undisturbed subgrade, 6 to 12 inches below frost line.
3. Base. 6 to 8 inches of compacted Granular A or B. Drainage tile if the wall retains a slope with water flow.
4. First course. Largest stones at the base, set on the granular base with their flattest face down. This course determines the wall’s plumb and line.
5. Stack. Subsequent courses staggered so vertical joints never align. Each stone seated in three points minimum on the course below. Mortar is not used.
6. Backfill. Granular fill behind the wall, drainage stone where required, soil and turf above frost line.
7. Cleanup. Track plates if turf was crossed, regrade, replace any damaged sod.
Typical residential install runs 2 to 5 working days. Larger projects with engineered drainage and 30+ stones run a week or longer.
What armour stone costs in the GTA
Pricing here pulls from our project log and from 2026 HomeStars contractor data across the Greater Toronto Area. Honest ranges. Cost shifts with stone size, quarry source, equipment access, and base prep complexity.
| Scope | Range (CAD) | Notes |
|---|---|---|
| Small armour stone supply | $80–180 each | 200–400 lb blocks |
| Medium armour stone supply | $200–500 each | 1,000–2,000 lb blocks |
| Large armour stone supply | $500–1,500 each | 3,000–6,000 lb blocks |
| Installed armour stone wall (gravity) | $200–450 / linear ft | up to 4 ft height |
| Garden border (single course) | $60–140 / linear ft | small stones |
| Pond / water feature install | $3,000–12,000 | scope-dependent |
| Outcrop feature stones | $400–1,800 each | placed |
Equipment access drives the labour line more than any other variable. Wide-open backyards with side-yard clearance over 10 feet keep cost lowest. Tight access that requires a crane lift or a hand-carried staging path roughly doubles labour.
Armour stone vs SRW versus natural stone gravity
Three systems often compete for the same scope. Armour stone wins on character and longevity but loses on uniformity. Modular concrete block (Allan Block, Unilock, Permacon) wins on speed and cost but reads as engineered hardscape. Natural stone gravity walls (limestone fieldstone) split the difference but require more skilled labour and more careful stone selection. We help you pick on the first visit, with the trade-offs made explicit. See our retaining walls, landscaping rocks, and exterior stonework pages for related scopes.
Frequently asked questions
How big is "armour stone" in pounds?
A small armour stone runs 200 to 400 pounds. A medium block runs 1,000 to 2,000 pounds. A large feature stone reaches 3,000 to 6,000 pounds. Anything under 200 pounds is usually called landscape rock, not armour stone.
Do I need a permit for an armour stone wall?
Yes if the retained height is 4 feet or more, measured from finished base grade to the top of the wall. Under 4 feet usually does not require a permit. We confirm scope at the site visit.
Can I install armour stone myself?
Possibly for small (200-pound) garden border pieces with two people and a hand truck. Anything 1,000 pounds or larger requires an excavator or skid-steer with a stone clamp. We have the equipment. Most clients find DIY beyond the small border scale not worth attempting.
How long does armour stone last?
Indefinitely. Limestone and dolomite armour stone in Toronto's climate has a service life measured in centuries, not decades. The stone itself does not fail. Settlement at the base is the only common issue, and proper Granular A base prep prevents that.