Retaining Wall Contractor in King City and Across King Township

We build retaining walls across King City, Nobleton, Schomberg and Kettleby — armour stone, segmental block, poured concrete, gabion and boulder walls sized for the estate lots, equestrian properties and rural slopes that define King Township. OCM Excavation & Construction has been grading and walling rural acreage in the GTA since 2008, and we know how Township of King governance, the Oak Ridges Moraine and the TRCA/LSRCA split actually play out on the ground. Call 416-317-3090 to walk your site.

Why retaining walls in King City need local skill

King City is part of the Township of King — not a city — and that governance shapes every project. Estate lots run 1 to 5 acres and up, slopes are long and gentle rather than the short urban benches you see in Toronto, and a typical wall here runs 50 to 200 linear feet rather than the 20 to 40 ft you would build behind a city semi. The Oak Ridges Moraine Conservation Plan limits grading, fill and impermeable cover across most of the Township, so wall geometry, drainage and disturbed area all have to be designed with that overlay in mind.

Heritage matters too. The King City core has a Heritage Conservation District character that favours natural stone — armour stone walls fit the streetscape in a way that grey concrete block does not. On equestrian properties around Nobleton and Kettleby, we are usually building paddock pads, run-in shed bases and manure containment walls — those need different drainage detailing than a residential garden wall.

Permits in King City are a layered conversation. The Ontario Building Code requires a Township Building Permit and a P.Eng-stamped design for any retaining wall 1.0 m or higher measured from finished grade. King Township’s Site Alteration By-law 2021-039 kicks in when grading or fill becomes substantial — and on Oak Ridges Moraine or Greenbelt land, the rules tighten further under ORM Area Zoning By-law 2005-23. Conservation Authority approval depends on where you sit: TRCA in south King, LSRCA in the north. Add a well and septic locate before the excavator turns up and you have a project that gets built once, properly.

Neighbourhoods we wall across King Township

• King City core — heritage-sensitive armour stone walls, terraced front gardens off King Road, walkout grading.
• Nobleton — estate-lot driveway walls, equestrian property paddock pads, gabion on rural acreage.
• Schomberg — village-scale segmental block, rural agricultural walls, ORM-overlay grading.
• Kettleby — hamlet heritage stonework, hillside boulder walls, woodland edge retention.

Types of retaining walls we build in King City

Armour stone — the default on estate properties and inside the King City heritage core. Limestone blocks 3 to 6 ft long set on a compacted granular base. Builds clean at 1 to 3 m and reads as natural rural fabric rather than imported finish. Pairs well with split-rail and board fencing.

Segmental block — Allan Block, Versa-Lok and similar engineered systems. Strong choice when you need precise terraced geometry around a pool, walkout basement or driveway turnaround. Geogrid reinforcement carries them past 1.5 m with a P.Eng stamp.

Poured concrete — used where structural loads are highest: basement walkouts, road-edge retention, walls carrying a vehicle surcharge. Faced with stone veneer or board-form texture when the look matters.

Gabion baskets — wire baskets filled with clean stone. Cost-efficient on long rural runs across acreage, lets water through without backing up behind the wall, and ages into the landscape.

Treated lumber — short garden walls under 0.6 m where budget matters and design life is 15 to 20 years.

Boulder walls — random fieldstone or quarried boulder, very common on equestrian properties for paddock pads, run-in shed bases and manure-pad retention. Reads honest on a working farm.

Our retaining wall process in King Township

1. Site walk and concept design — slope, drainage path, well and septic locate, intended use (garden, driveway, paddock, walkout).
2. ORM / Greenbelt pre-check and Township zoning confirmation against By-law 2005-23 where applicable.
3. Geotechnical input on cohesive soils and groundwater where the wall exceeds 1.5 m.
4. P.Eng-stamped drawings for any wall over 1.0 m, as required under the Ontario Building Code.
5. Township of King Building Permit, plus Site Alteration application under By-law 2021-039 if earthworks are substantial.
6. Conservation Authority permit where the work sits inside TRCA (south King) or LSRCA (north King) regulated area.
7. Bench cut, drainage stone, perforated drain to daylight or to a discharge point, geogrid layers, wall course-by-course, compacted backfill in lifts, restoration.

For the excavation, hauling and grading that wrap around a wall build we cross-reference our excavation contractor work in King City and our King City land grading page so the wall, the cut and the finished grade are designed as one.

What affects retaining wall cost in King City

• Length — estate runs of 50 to 200 linear ft are common here, and per-foot cost drops as length goes up.
• Height — walls over 1.0 m trigger P.Eng design and a Township Building Permit. Walls over 1.5 m usually need geogrid or structural reinforcement.
• Material — armour stone and poured concrete sit at the top of the range; segmental block in the middle; gabion and treated lumber lower.
• P.Eng fees — stamped design typically a fixed line item on permit-required walls.
• Township Building Permit fees — billed per the King Township fee schedule.
• ORM / Greenbelt and Conservation Authority permits — additional review where TRCA, LSRCA or ORM overlays apply.
• Site Alteration application under 2021-039 when grading is substantial.
• Soil disposal — excess clay and till hauled to a licensed receiving site; cost depends on quantity and haul distance.

For the general retaining wall cost framework we use across the region, see our retaining wall construction Toronto & GTA page and our armour stone installation guide.

Frequently asked questions

Do I need a permit for a retaining wall in King Township?

Under the Ontario Building Code any wall 1.0 m or higher needs a Township of King Building Permit and a P.Eng-stamped design. Substantial grading or fill alongside the wall triggers Site Alteration By-law 2021-039. On Oak Ridges Moraine or Greenbelt land, ORM Area Zoning By-law 2005-23 applies, and TRCA or LSRCA permits may be needed depending on which side of the Township you sit on.

What is the best wall for a King City estate lot?

For most estate properties in King City core, Nobleton or Kettleby we recommend armour stone. It reads as natural rural fabric, fits the heritage character of the King Road corridor, holds up to frost and runoff, and scales cleanly from a 40 ft garden wall up to a 200 ft terraced driveway run.

Do you build walls on equestrian properties?

Yes. Around Nobleton and Schomberg we regularly build paddock pads, run-in shed base walls, manure containment bases and gabion walls along laneways and pasture edges. Drainage detailing on a horse property is different from a residential garden wall and we design for it from the start.

Does my property fall under TRCA or LSRCA?

King Township is split. South King is regulated by the Toronto and Region Conservation Authority (TRCA); north King is regulated by the Lake Simcoe Region Conservation Authority (LSRCA). The line matters because each authority has its own application, fee schedule and regulated-area mapping. We confirm jurisdiction during the site walk before any drawings are stamped.

To talk through a wall in King City, Nobleton, Schomberg or Kettleby, call OCM at 416-317-3090.

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