Site preparation is everything between “I want to build” and “the foundation crew can start.” Miss one step and you’ll hit a stop-work order, a $100K fine, or a six-week delay. OCM Excavation & Construction handles every step across Toronto, North York, Mississauga, Vaughan, Markham, Richmond Hill, and Brampton. Call 416-317-3090 — here’s the full checklist.
The Complete Site Preparation Checklist for GTA Homeowners
1. Permits and Approvals
Building permit, demolition permit (if a structure exists), tree removal permit (Toronto protects most trees over 30 cm), and conservation authority approval if you’re near a ravine or floodplain. Budget 4–12 weeks depending on the municipality.
2. Property Survey and Stakes
An up-to-date legal survey showing property lines, easements, and elevations. An Ontario Land Surveyor sets physical stakes so the excavator knows exactly where to dig. Cost: $1,500–$3,500 for most residential lots.
3. Utility Locates
Call Ontario One Call at least 5 business days before any digging. It’s free and legally required. They mark gas, hydro, water, telecom, and cable. Private locates (sprinklers, pool lines, dog fences) cost extra but save you from $5,000 repair bills.
4. Demolition
If a structure exists, it comes down first. This includes disconnecting utilities at the meter, asbestos and lead testing if the building is pre-1990, and proper disposal of materials. Toronto demolition permits take 2–6 weeks.
5. Tree and Brush Clearing
Only permitted trees come down. We chip brush on site or haul it. Stumps get ground or pulled depending on proximity to the foundation footprint.
6. Soil Testing
A geotechnical report tells you bearing capacity, water table depth, and contamination status. Required for most new builds. Ontario Regulation 406/19 also requires excess soil testing before haul-off. Cost: $1,500–$4,000.
7. Rough Grading and Drainage
The site has to drain away from the future foundation at a minimum 2% slope. We strip and stockpile topsoil for landscaping later, then shape the subgrade. See our land grading and yard prep page for full details on this step.
8. Site Access and Protection
Construction fence, silt fence for erosion control, tree protection hoarding (required by Toronto for any protected tree within 6 m of work), driveway protection mats, and a mud-control entrance.
What the Homeowner Does vs. What OCM Handles
You handle: hiring the architect or designer, signing the survey and soil test contracts, paying permit fees, and choosing the builder.
OCM handles: coordinating Ontario One Call locates, demolition, tree work (with your permit), clearing, grading, drainage, site protection, and haul-off. We also flag anything missing in your permit package before we mobilize.
5 Common Site Prep Mistakes
- Skipping private utility locates. Public locates miss sprinkler lines and pool plumbing. Hitting one costs you, not the locator.
- Cutting a protected tree without a permit. Toronto fines can hit $100,000 per tree.
- Stockpiling spoil on the property line. Neighbours complain, the city issues stop-work orders.
- Not testing soil before haul-off. Contaminated soil discovered mid-job triples disposal cost.
- Grading toward the house. Causes basement flooding the first heavy rain after backfill.
For the full scope of what we cover, see our site preparation services page. For typical pricing, see our excavation cost guide for the GTA.
Frequently Asked Questions
How much does site preparation cost in the GTA?
For a standard residential lot, site prep runs $5,000–$20,000. Demolition of an existing house adds $15,000–$40,000. Heavily treed lots, contaminated soil, or tight access push the number higher.
Ready to get a quote for your project?
OCM Excavation serves all of the GTA. We respond same day and provide free, no-obligation estimates.
📞 Call 416-317-3090 Request a Quote →How long does site preparation take?
On-site work is usually 3–10 days for a clean residential lot. Demolition adds 1–2 weeks. Permits and approvals sit on top of that — figure 4–12 weeks of paperwork before any crew shows up.
Do I need a soil test for a small addition?
For most additions under 50 sq meters, no full geotechnical report is required, but soil disposal still falls under Ontario Regulation 406/19 if you’re hauling fill off site. Your municipality may require a basic soils letter for the permit.
Can OCM handle tree removal too?
Yes, once you have the tree removal permit in hand. We coordinate with certified arborists for protected trees and handle chipping, stump grinding, and haul-off in one go.
What if I find contaminated soil mid-job?
It happens on older Toronto lots near former industrial use. We stop work, get the soil tested, and arrange disposal at a Class 2 or Class 3 fill site. Proper handling protects you from MOE fines later.
Get a Free Site Prep Quote
Call OCM at 416-317-3090 or request a free quote. Send us your lot address and permit drawings — we’ll walk the site, flag any gaps in your checklist, and price the work the same day.
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