Site Preparation in North York — New Build, Addition, Foundation

OCM Excavation & Construction handles full site preparation in North York for tear-downs, custom infill builds, additions, and foundation rebuilds. From Willowdale and Bayview Village to Don Mills and the Yonge corridor, we manage demolition prep, tree protection, grading, shoring, and excavation under Toronto Building permits. If you are a homeowner, designer, or general contractor staging a project north of the 401, call 416-317-3090 for a site visit and a written quote.

What Site Preparation Covers in North York

Site preparation is the work that happens between architectural drawings and the first pour. On a typical North York infill lot — say a 40-by-120 bungalow lot in Lansing or Newtonbrook — we sequence the following:

Tree protection zones and hoarding per Toronto Urban Forestry, with arborist coordination where 30 cm DBH trees are involved
Locates (Ontario One Call) and private utility scan before any blade touches dirt
Silt fence, mud mat, and street-clean plan for laneway and frontage protection
Demolition rough-grade after the structure comes down — clean fill in, debris out
Bulk excavation for basement, walk-out, or addition footprint to engineered depth
Shoring or benching where the dig is close to neighbouring foundations
Sub-grade compaction, granular base, and weeping tile prep before footings

Older North York neighbourhoods like Willowdale East, Hoggs Hollow, and parts of Bayview Village sit on clay-heavy soils with shallow groundwater pockets. We plan dewatering up front rather than reacting to a flooded hole on day three.

Permits, Tree Bylaw, and Toronto Compliance

North York is part of the City of Toronto, so permits go through Toronto Building and tree work goes through Urban Forestry. The two we deal with on almost every site prep job:

Building/demolition permit — required before any structural demo or excavation tied to a new build. We coordinate with your architect and submit excavation-related sheets.
Private Tree Bylaw (Chapter 813) — any privately-owned tree with a trunk diameter of 30 cm or more at 1.4 m height is protected. Injury or removal needs a permit. City-owned trees on the boulevard are covered separately under Chapter 813 as well.

We do not invent timelines for Toronto permit review — turnaround depends on the application, the zoning, and whether Committee of Adjustment is in the loop. What we do guarantee is that our portion of the package — shoring drawings, sediment control plan, tree protection hoarding — gets to your designer on time.

Tear-Down to Foundation: How We Sequence a Job

Most of our North York site prep work is on tear-down lots where a 1950s or 1960s home is being replaced with a 4,000–6,000 sq ft custom. The sequence we run:

Pre-construction walk with the builder, designer, and surveyor. Confirm lot lines, easements, and tree drip lines.
Install tree protection hoarding and silt control before demo starts.
Disconnect and cap utilities (gas, water, sewer, hydro) — coordinated with the utility companies.
Demolition by our partner or your selected sub. We handle the rough grade after.
Bulk dig to engineered footing elevation, typically 7 to 10 ft below grade for a full basement.
Shoring where required — soldier pile and lagging or hydraulic shoring against neighbour foundations.
Sub-grade prep: laser-checked elevations, compacted granular, drainage stone for weepers.
Hand off a clean, square, true-to-elevation hole to the foundation crew.

Why North York Builders Call OCM

North York lots are tight. Setbacks are short, neighbours are close, and the city watches dust, mud, and noise. We bring compact excavators where the laneway is narrow, run our trucks on a schedule that keeps the street clear, and document every truckload of soil out and granular in. We work across the rest of the GTA too — see our service areas and our sibling Toronto site preparation page for the broader scope.

What we will not do: low-ball the dig and then change-order you on shoring or dewatering. North York soil and proximity issues are predictable on a walk-through, and we price them in.

Frequently Asked Questions

Do I need a tree permit before site prep starts in North York?

If any private tree on your lot has a trunk diameter of 30 cm or more measured at 1.4 m above the ground, yes — Toronto’s Chapter 813 Private Tree Bylaw applies and a permit from Urban Forestry is required before injury or removal. City-owned and boulevard trees are also protected. We coordinate hoarding and arborist reports with your designer.

How deep is a typical basement excavation in North York?

Most full-basement new builds dig to roughly 7 to 10 ft below finished grade, with footing elevations set by your structural drawings. Walk-out basements on sloped lots near the ravines or Don Valley can go deeper on one side. Frost depth in Toronto sits around 1.2 m, so footings need to clear that minimum.

Do you handle shoring when the dig is tight to a neighbour’s foundation?

Yes. On infill lots in Willowdale, Lansing, and Bayview Village we frequently work within a few feet of an existing house. Soldier pile and lagging or engineered hydraulic shoring keeps the excavation safe and the neighbour’s foundation undisturbed. Shoring design comes from a P.Eng and is included in our quote when the dig geometry requires it.

What about dewatering on clay-heavy lots?

Parts of North York — particularly older areas near Hoggs Hollow and pockets of Don Mills — have perched water tables in the clay. We plan dewatering during the quote stage: sump pits, well points, or a discharge plan into the storm system with City approval. Reacting after the hole fills costs you days and money.

Can you do an addition without disturbing the rest of the house?

Yes. For rear or side additions in Don Mills, Bayview Village, and the Yonge corridor we use compact equipment, hand-dig where needed, and underpin or pin foundations where the new footings tie into the existing. We protect landscape, driveway, and interior finishes during the excavation phase.

How do I get a quote for site preparation in North York?

Call 416-317-3090 or use our free quote form. Send us the architectural set if you have it, the survey, and any arborist or geotechnical reports. We walk the site, confirm access, and put a written scope and price in front of you.

Ready to Break Ground in North York?

OCM Excavation & Construction is the site prep partner North York builders and homeowners call when the schedule is tight and the lot is tighter. Call 416-317-3090 or request a free quote through our contact page. We will be on site for a walk-through within days, not weeks.