Site Preparation in Scarborough — New Build, Addition, Foundation

We are OCM Excavation & Construction, and we handle site preparation in Scarborough for custom rebuilds, second-storey additions, foundation replacements, and full new builds. From an Agincourt bungalow being knocked down for a two-storey custom, to a Wexford lot getting an addition off the back, to a Birch Cliff property going to footings, we clear the site, protect the trees, manage the soil under O. Reg 406/19, and get the pad ready for the foundation crew. Call 416-317-3090 for a Scarborough site visit.

What site preparation covers on a Scarborough lot

Site preparation in Scarborough usually means demolition coordination, tree protection fencing, utility locates and disconnects, topsoil strip, rough grading to the engineer’s plan, excavation for the foundation, shoring where the dig sits close to the neighbour’s footing, and a clean pad ready for forms. On a typical 40 by 120 Scarborough lot the dig is 8 to 10 feet for a full basement, and the soil load runs 80 to 150 tonnes depending on whether there is an existing basement coming out.

Agincourt, Wexford, Cedar Brae — the 60s and 70s rebuild belt

Most of our Scarborough work is in the older subdivisions north of the 401 and through the middle of the borough — Agincourt, Wexford, Cedar Brae, Tam O’Shanter, Bendale. These streets were built out between 1960 and 1985 with brick bungalows and side-splits on 40 to 60 foot lots, and they are turning over fast to custom rebuilds. The houses are small, the lots are deep, and the underground services are old. Expect clay-loam soil, asbestos checks on anything pre-1990, and at least one mature Norway maple or silver maple that the Chapter 813 tree by-law will want protected.

Guildwood, Birch Cliff, the Bluffs — ravine and slope work

South Scarborough is a different job. Guildwood, Cliffside, Birch Cliff, and anything along the Scarborough Bluffs sits in or beside TRCA regulated land, ravine systems, or top-of-slope setbacks. If your property is within the Toronto Ravine and Natural Feature Protection area, Chapter 658 applies — and that covers grading, hard surfaces, retaining walls, and tree removal regardless of size. Add the Bluffs specifically and you are looking at geotechnical engineering, top-of-slope setback bands, and a TRCA permit under Ontario Regulation 41/24 before anyone touches the site. We do the pre-construction call with TRCA staff so you know what is buildable before the demo crew shows up.

Tree protection and the Chapter 813 problem

Toronto’s private tree by-law (Chapter 813) protects any tree on private property at 30 cm DBH or larger. On a typical Scarborough rebuild that usually means one or two mature trees that need a tree protection zone fenced before machinery moves in, and an injury or removal permit if the dig will affect the root zone. We coordinate with your arborist, install the TPZ hoarding to the by-law spec, and keep the dig outside the critical root zone. If a tree has to come down, we do the permit submission and the replacement planting follow-through.

Excess soil under O. Reg 406/19

Every Scarborough site prep job over 100 cubic metres of soil has to comply with Ontario Regulation 406/19. That means a sampling and analysis plan, soil characterization, a destination receiving site that matches the soil quality category, and a tracking record from origin to receiver. We handle the sampling coordination, line up a compliant receiver, and keep the manifests on file. If your soil tests clean it goes to a fill site. If it comes back impacted — and on older Scarborough industrial-adjacent lots it sometimes does — we route it to a licensed Class 1 or Class 2 receiver.

Why Scarborough builders and homeowners call OCM

We know the Scarborough permit desk, we know which TRCA file numbers cover the Bluffs versus Highland Creek versus the Rouge, and we know the soil. We show up on the date in the schedule, we run the excavator inside the tree protection zones without clipping the hoarding, and we leave a pad the foundation crew can form on without a re-dig. We are a Scarborough-active contractor — Agincourt one week, Guildwood the next — and we treat your neighbour’s driveway and the boulevard like ours. Call 416-317-3090 or visit our service areas page to confirm we cover your street.

FAQ — Scarborough site preparation

Do I need a TRCA permit for site prep in Scarborough?

If your property sits inside a TRCA Regulated Area — most Bluffs-adjacent lots, anything along Highland Creek, the Rouge, or the Don tributaries — then site alteration, grading, and excavation can require a permit under Ontario Regulation 41/24. We confirm regulation status with TRCA staff before scheduling the dig. Inland Agincourt and Wexford lots generally fall outside the regulated mapping.

How deep do you dig for a full basement in Scarborough?

Most Scarborough rebuilds get an 8 to 10 foot dig for a full basement, which puts the footing well below the Toronto frost line of roughly 1.2 metres. The exact depth comes off the engineer’s foundation drawings and adjusts for the existing grade. On a sloped Birch Cliff or Cliffside lot we step the footing to match the slope rather than over-dig the high side.

What does Chapter 813 mean for my Scarborough tree?

Any tree on your Scarborough property at 30 cm diameter at breast height or larger is protected. Removal, or work inside its root zone, requires a permit from Urban Forestry. We fence a tree protection zone before machines arrive, keep the excavation outside the critical root zone, and route the permit application through your arborist if a tree has to be removed for the build.

Can you do site prep on a Scarborough Bluffs property?

Yes, and we do — but Bluffs work needs a geotechnical engineer, a top-of-slope setback review, and almost always a TRCA permit under Ontario Regulation 41/24. We will not pull the excavator onto a Bluffs lot until that paperwork is in hand. If your project sits inside the Chapter 658 ravine protection area, that authorization comes first too.

Where does the soil from my Scarborough dig go?

Under Ontario Regulation 406/19, excess soil over 100 cubic metres needs sampling, characterization, and tracking to a destination matched to its quality. Clean soil goes to a registered fill site. Impacted soil — which occasionally shows up on older lots near industrial corridors in the south end — goes to a licensed Class 1 or Class 2 receiver. We keep the manifests and hand them to your project file.

How is Scarborough site prep different from downtown Toronto?

Scarborough lots are wider, the access is better, and we can usually swing a full-size excavator straight in. Downtown Toronto — the laneway and infill work covered on our Toronto site preparation page — is a tight-access game with mini-excavators and conveyor mucking. Scarborough is also more likely to involve TRCA, ravine bylaws, and slope work, especially south of Kingston Road.

Get a Scarborough site prep quote

Send us the property address, the proposed footprint, and the engineer’s drawings if you have them. We will walk the Scarborough lot, confirm the tree by-law and TRCA status, and quote the demolition, dig, soil, and grading as one line. Call 416-317-3090 or use the free quote form and we will book the site visit.

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