Shoring Contractor Toronto & GTA — Soldier Pile, Hydraulic & Sheet Pile Systems

Shoring is not an add-on — it is what keeps the excavation from taking the neighbour’s foundation with it. OCM Excavation installs engineered temporary earth-retention systems on residential and small-commercial sites across the GTA: soldier pile and lagging, hydraulic trench shoring, sheet pile, cantilever, raked, and secant pile configurations. We work with a licensed P.Eng partner on every system that requires stamped drawings, and we carry $2M general liability plus coverage on every crew. For a free on-site shoring assessment, call 416-317-3090.

Most GTA homeowners encounter shoring when they push a basement underpinning job to the lot line, replace a sewer lateral beside a neighbour’s footing, or add a below-grade addition on a narrow Toronto infill lot. The engineering is temporary — the system comes out once the foundation or structure is self-supporting — but the consequences of skipping it are permanent. A wall collapse beside an adjacent house is a six-figure liability event and a worksite fatality risk. Ontario Regulation 213/91 and Toronto Building Standards Engineering (TBSE) both treat shoring as mandatory, not optional, once you cross specific depth and proximity thresholds.

OCM has been doing this work across the GTA for 18 years. Owner-operated. The same crew that quotes the job runs the job. We do not subcontract the shoring install to whoever is cheapest that week. That matters when the dig is 1.5 metres from a 1940s brick party wall and a homeowner is watching from their kitchen window.

Types of Shoring OCM Installs

The right system depends on depth, soil type, how close you are to adjacent structures, and whether the site can absorb horizontal bracing or needs to stay open for equipment movement. Here is an honest breakdown:

Soldier Pile and Lagging

Steel H-piles driven or augered at roughly 2-metre centres, with horizontal timber lagging boards placed between them as excavation proceeds. Soldier pile is the most common system on Toronto urban lots: it works in the mixed clay, silt, and urban fill that dominates most neighbourhoods, the piles can be installed close to existing footings without the vibration of sheet pile driving, and it leaves a clear working face for form and pour work. Limitation: not watertight. If the site has groundwater, you pair it with dewatering. We handle in-house dewatering on most jobs using submersible and wellpoint setups — ask about it on the quote call.

Hydraulic Trench Shoring

Aluminium hydraulic shores — either individual strut sets or slide-rail panel systems — are the fast, cost-effective answer for linear trench work: sewer and water mains, foundation drains, waterproofing trenches. A two-person crew sets hydraulic shores in minutes versus hours for driven systems. They are rated for the soil types we see across the GTA (Ontario 213/91 Type 2 and Type 3) and come out clean for re-use. They are not the answer for wide open excavations or anything requiring permanent lateral support past about 6 metres deep.

Sheet Pile

Interlocking steel or vinyl sections driven into the ground before excavation starts. Sheet pile is watertight, which makes it the right choice when you are working below the water table and cannot dewater the site economically. The downside on urban Toronto lots: vibration from driving can disturb adjacent footings and crack plaster. OCM uses a press-in or vibratory method calibrated to site conditions, and we monitor adjacent structures with survey nails before and after. For heritage properties or party-wall situations, we typically recommend soldier pile instead unless groundwater makes sheet pile unavoidable.

Cantilever Systems

A cantilever wall — most often soldier piles or sheet pile used without internal bracing — relies on passive soil resistance below the excavation level to stay upright. It works for moderate depths (roughly up to 4-5 metres) and avoids the obstruction of internal struts or tiebacks. Deeper than that, or in softer soils, cantilever deflection becomes a structural concern and you need rakers or anchors.

Raked (Raker) Shoring

Diagonal compression struts — rakers — bear from the retained wall down to a kicker block at the excavation floor. Rakers keep the floor space clear of horizontal struts, which matters when you need to pour a slab before the shoring comes out. They take up floor area near the wall and require the kicker block design to be part of the structural drawings. Common on Toronto residential lowering jobs where the slab is poured in stages.

Secant Pile

Overlapping bored concrete piles — alternating unreinforced (primary) and reinforced (secondary) — create a near-watertight wall before excavation starts. Secant pile is the high-end solution for tight urban sites with high water tables, or where the shoring wall is incorporated into the permanent basement structure. The cost is substantially higher than soldier pile or sheet pile, but so is the performance. We partner with specialist piling subcontractors for secant work and project-manage the full sequence.

When Shoring Is Legally Required in Toronto

Ontario Regulation 213/91 (Construction Projects) sets the floor: any excavation deeper than 1.2 metres that a worker must enter requires shoring, sloping, or a protective system rated for the soil type. There are no exceptions for residential work. The regulation classifies soil into Types 1 through 4, and most of the clay-dominant ground across central Toronto and the inner suburbs is Type 2 or Type 3 — which limits unshored vertical wall height to essentially nothing for worker entry.

Toronto Building Standards Engineering adds a second layer. TBSE requires a geotechnical engineer’s letter or stamped shoring drawings for any excavation that:

Exceeds 1.5 metres in depth adjacent to an existing structure
Is within a horizontal distance equal to the excavation depth from an adjacent property or building footing
Is in a heritage district or on a street flagged for settlement sensitivity
Involves a party-wall condition (shared or abutting wall)

Party-wall agreements — required when your excavation could affect a structurally attached or immediately adjacent neighbour — go through the Toronto Public Realm and Infrastructure office. They take time. If your contractor has not mentioned party-wall notification as part of the permit timeline, ask specifically. Skipping it creates neighbour dispute liability that can stop a job mid-dig.

The Ontario Building Code 2024 does not override 213/91 — both apply simultaneously. Your building permit does not constitute a shoring plan. The shoring drawings are a separate deliverable, typically submitted with or shortly after the foundation permit application.

What Shoring Costs in the GTA

Honest range for residential and small-commercial shoring in the Toronto area: $15,000 to $45,000. The variables that move the number:

Depth — Going from 2 metres to 4 metres is not a linear cost increase. Deeper walls require heavier sections, more anchor/raker points, and more complex drawings.
Linear metres of retained wall — A 10-metre shoring run is not half the cost of a 20-metre run once mobilisation and engineering are factored in.
Soil type and groundwater — Wet, loose, or fill soils increase engineering complexity and may add dewatering costs. Dense clay drives a lower install cost than urban fill with debris inclusions.
Monitoring requirements — If the engineer specifies survey nail monitoring or inclinometers on adjacent structures, that is a separate line item. Most Toronto party-wall situations require at least pre- and post-construction surveys.
System type — Hydraulic trench shores for a linear sewer job run at the low end. Secant pile for a high-water-table urban basement runs at the high end. Soldier pile for a standard lowering job sits in the middle of the range.
Removal — Most temporary systems come out after construction. The pull-out is included in our quote. Soldier piles are often cut and left below grade — we specify this upfront.

We do not give shoring quotes over the phone. The system design depends on what we see at the site — soil conditions, adjacent footings, available access, sequencing with the overall dig. Call 416-317-3090 to set up a free on-site assessment.

Permits and Neighbour Notification

In Toronto, the shoring permit process typically runs parallel to the building permit. Here is the sequence on a standard residential job:

Geotechnical assessment of soil conditions (can be combined with the general site report for the foundation permit)
P.Eng shoring drawings stamped and submitted to the City as part of or alongside the foundation/demolition permit package
Party-wall surveyor engaged if any adjacent structure is within the zone of influence — pre-construction survey completed and agreed upon with neighbour before breaking ground
Toronto Public Realm notification where work affects the boulevard or right-of-way (road occupation permit may be required for access equipment)
City review and permit issuance — typical review time 4-8 weeks for a standard residential application in 2024-2025
Shoring installation per stamped drawings — Ministry of Labour inspector may attend; site must be able to produce drawings on demand

Regulation 213/91 places the compliance obligation on the constructor — the general contractor or excavation contractor in charge of the site — not on the homeowner. If OCM is running the excavation, we are responsible for confirming the shoring system meets the regulation before any worker enters the trench. We build that into the job, not after the fact.

Why Hire OCM as Your Shoring Contractor

There are a few things that separate a shoring contractor who does this right from one who wings it:

In-house P.Eng partnership — We work with licensed engineers who stamp shoring drawings specifically for each site. Not a generic “our engineer will sign off on anything” arrangement — actual site-specific design.
insured and $2M general liability — Both current. Certificates available before contract execution. Do not hire a shoring contractor who cannot hand you both documents before mobilising.
18 years in the GTA — We have worked in Toronto clay, Vaughan drumlin till, Richmond Hill silt, and everything in between. Soil conditions across the GTA vary meaningfully and we account for that in the system design.
Owner-operated — The estimator who quotes your job is connected to the crew running it. No handoff to a subcontractor you have never met.
Equipment that fits urban lots — Our Yanmar SV40 (1.8-metre tail swing, 1.8-metre wide) operates in 6-foot side-yard access. The Vio17 fits through a 38-inch gate opening with a buffer to a 39-inch standard gate. The GEHL RT135 track loader handles material movement in the same tight access conditions. We do not bring a full-size machine to a site that needs a compact — that decision gets made at the quote stage, not the morning of mobilisation.

Real-world example: see our Toronto East End underpinning project — same trade-offs in action.

Shoring Service Area — GTA and Surrounding Cities

OCM provides shoring contractor services across the Greater Toronto Area including:

Toronto · Vaughan · Richmond Hill · Markham · Mississauga · North York · Etobicoke · Scarborough · Brampton · Oakville · Burlington · Newmarket · Aurora · Woodbridge · King City

Travel time affects mobilisation cost on remote sites. Jobs within 45 minutes of King City (our base) quote at standard rates.

Shoring by City — Detailed Service Pages

We have city-specific shoring pages with local soil notes, typical job types, and permit context for each major service area. If your project is in one of these cities, start there for the most relevant detail:

Also see the comparison pillar: Basement Underpinning vs Walk-Up vs Egress Window — Which Adds the Most Value?

Frequently Asked Questions — Shoring Contractor Toronto

How long does a shoring installation take?

For a standard residential job — soldier pile on a 10-15 metre run — installation is typically 1 to 3 days once permits are in hand and the P.Eng drawings are stamped. Hydraulic trench shores for a linear sewer job go in the same day as the trench is opened. More complex systems (rakers, secant pile) take longer and are sequenced with the overall excavation schedule. Removal of temporary shoring adds another 1-2 days at the back end of the job.

Hydraulic shoring vs soldier pile — which is right for my job?

If you are digging a trench (sewer, drain, waterproofing), hydraulic shores are faster and less expensive. If you are doing an open excavation — basement lowering, underpinning, foundation work — soldier pile gives you a stable retained wall across the whole face without blocking the working area with struts. We will recommend the right system at the site visit. Both are OHSA-compliant when installed per 213/91.

Do I need a permit specifically for shoring?

In Toronto, the shoring drawings are submitted as part of the building permit package rather than as a standalone permit. The City will not release the foundation permit without a compliant shoring plan if your excavation triggers the TBSE adjacency thresholds. In practice: yes, shoring requires engineering and permit review, but it goes through the same portal as your main permit application.

How deep can you excavate with shoring?

There is no hard regulatory ceiling — the depth is a structural engineering question. We have done residential jobs to 4.5 metres on Toronto clay. Deeper than that, the system complexity increases substantially and secant or anchored soldier pile becomes necessary. For most residential work (basement underpinning, lowering, sewer replacement), the practical range is 1.5 to 4 metres.

How close to a neighbour’s foundation can you work?

There is no minimum setback that makes shoring automatically unnecessary — it depends on the depth of your excavation relative to the bearing depth of the adjacent footing. The TBSE guideline uses a 1:1 ratio as a starting point: if you are digging 2 metres, any footing within 2 metres horizontally is in the zone of influence. The engineer’s drawings will specify the protection required. Party-wall notification to the neighbour is separate from the structural requirement and is triggered by proximity to shared or adjacent walls.

Do you handle dewatering alongside shoring?

Yes. We run submersible pumps and wellpoint systems in-house on most jobs. If the site has groundwater that hydraulic or soldier pile shoring will not seal, we pump the excavation dry while the work is ongoing. We handle the discharge permitting for dewatering to the City storm drain where required. Dewatering is quoted as a separate line item because run time varies with seasonal water table — but we do not hand you off to a third party for it.

What is a party-wall agreement and do I need one?

A party-wall agreement (or party-wall notice, in Toronto practice) is a formal notification — and sometimes a legal agreement — with the adjacent property owner before you begin excavation that could affect their structure. Toronto does not have a statutory party-wall act equivalent to the UK system, but TBSE and the building permit process require evidence of neighbour notification and pre-construction survey when the dig is close enough to affect the neighbour’s footing. Your lawyer or the building permit reviewer will flag this if it applies. We can provide a referral to a party-wall surveyor if needed.

Can shoring be used for underpinning work?

Yes — shoring and underpinning are closely linked. When you are lowering a basement floor, you are simultaneously exposing the existing footing and often excavating beside the neighbour’s footing. The underpinning sequence (pin-by-pin or bench underpinning) is designed so that no more than a specified length of existing footing is unsupported at once. Shoring of the open excavation walls runs alongside the underpinning sequence. The two sets of drawings — underpinning engineer and shoring engineer — are often produced by the same P.Eng. See our basement underpinning comparison guide for more on the overall basement lowering process.

What is the difference between shoring and underpinning?

Shoring holds the excavation walls back during the dig — it is temporary earth retention. Underpinning deepens or strengthens an existing footing — it is a permanent structural modification. A basement lowering job requires both: shoring to hold the walls while you work, and underpinning to extend the existing footing down to the new floor level. Neither replaces the other.

Get a Free On-Site Shoring Assessment

If your project involves a deep excavation, a tight lot, a neighbour’s foundation nearby, or any combination of the three, call us before you call anyone else. We assess the site, identify the right shoring system, and give you a written quote with the engineering scope included — not a ballpark that triples once the P.Eng sees the drawings.

Call 416-317-3090 — available Monday to Saturday, 7 AM to 6 PM. Or use the contact form below and we will respond within one business day.

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