Just finished our backyard project in Thornhill (between Yonge and Bathurst, York Region side). Sharing because I found almost no detailed Thornhill-specific outdoor renovation content when I was planning.
Our situation:
Late 1990s detached, large 60-foot wide lot, the backyard was a blank slate — just grass and an old wooden deck that had rotted beyond repair.
What we built:
- Removed old deck (4 loads of debris)
- 500 sq ft interlock patio (Techo-Bloc Borealis, charcoal colour)
- Flagstone pathway from side gate to patio (Brampton Stone irregular limestone)
- Low armour stone retaining wall along back of property (grade change of about 18 inches)
- Pergola over main patio area (aluminum, powder coated, with sun shade fabric)
- New cedar fence (replaced 3-board sections)
Who we used:
LF Builders (lfbuilders.ca) for the interlock, flagstone, and armour stone — they’ve been doing work in our neighbourhood for decades and the neighbours all seem to have used them at some point. The pergola was a separate contractor.
Costs:
| Item | Cost |
|---|---|
| Interlock patio (500 sq ft) | $23,500 |
| Flagstone pathway | $5,800 |
| Armour stone wall | $7,200 |
| Pergola | $11,400 |
| Cedar fence (3 sections) | $4,100 |
| Total | $52,000 |
Very happy with the result. First spring since completion and the interlock has settled perfectly — no shifting, excellent drainage.
home.renovation.reviews for more outdoor renovation projects across the GTA.