Excavation Contractor in Halton Hills
OCM Excavation & Construction is a full-service excavation contractor working across Halton Hills — from the brick-front streets of Georgetown through the heritage core of Acton and out into the hobby farms tucked along the Niagara Escarpment. We handle foundation digs, basements, rural driveways, septic beds, lot grading, mini-excavator work, demolition, and escarpment rock removal. Whether you are building a new home in Delrex, replacing a culvert off Trafalgar Road, or fixing a wet basement in Glen Williams, call 416-317-3090 for a free site visit.
Halton Hills villages we cover
Halton Hills splits into two main town centres and a string of villages. On the Georgetown side we work the Park District around Main Street, the postwar Delrex subdivision, and the gentler estate lots that creep north toward Glen Williams along the Credit River. On the Acton side we cover Acton Heights, the Mill Street corridor, and the rural pockets running out to Norval, Stewarttown, and Limehouse where lots get larger, water tables get trickier, and limestone outcrops show up in the dig.
Excavation services we provide in Halton Hills
- Foundation excavation — new builds, additions, and rear-yard extensions dug to the Ontario Building Code 1.2 m frost depth.
- Basement digs and lower-level conversions — bench footings, underpinning prep, and full-depth basements in older Georgetown houses.
- Rural driveways and culverts — gravel base, geotextile, and entrance culverts sized to Town of Halton Hills entrance permit requirements.
- Septic system excavation — tank pits, bed prep, and tie-ins on rural Acton, Limehouse, and Stewarttown properties.
- Grading and drainage — re-grade away from the foundation, swales, and lot drainage to keep clay-loam runoff off the slab.
- Mini-excavator work — tight access in heritage Glen Williams or behind detached Georgetown garages.
- Demolition and haul-away — small structures, slabs, old pools, and contaminated fill.
- Escarpment rock work — breaking and hauling limestone where the Niagara Escarpment surfaces under your footprint.
Halton Hills permits, conservation, and the Niagara Escarpment
Excavation in Halton Hills usually involves more than one approval. The Town of Halton Hills Building Services department issues building permits and site alteration approvals. The Credit Valley Conservation (CVC) authority regulates the Credit River watershed — which runs through Georgetown, Glen Williams, and Norval — while Conservation Halton covers the Sixteen Mile Creek headwaters on the Acton and west side of town. Both authorities work under Ontario Regulation 41/24, with regulated buffers commonly in the 15-30 m range from a stable top of bank, wetland edge, or floodplain.
The Niagara Escarpment Commission (NEC) overlays a large chunk of rural Halton Hills under its Niagara Escarpment Plan, and a Development Permit may be needed before any cut, fill, or footing goes in. Add the Greenbelt Plan overlay on top of much of the rural area, and the heritage district designations in Glen Williams and Stewarttown, and the soft costs of getting clearances stack up fast. We coordinate the dig sequence with whichever authority is in play so the excavator does not show up before the paperwork lands.
Soils, frost, and what to expect under the bucket
Halton Hills soils are mostly clay-loam over till, with limestone bedrock from the Niagara Escarpment surfacing on the west and north sides toward Limehouse and the Eighth Line. Clay-loam holds water, swells, and shrinks — which is why drainage details around the footing matter more here than in sandier parts of the GTA. Where the escarpment limestone is shallow we bring a hydraulic hammer rather than fighting it with a standard bucket. Footings go a minimum 1.2 m below grade for frost, and we typically over-dig 600 mm beyond the foundation line for waterproofing and drainage tile access.
Why Halton Hills homeowners call OCM
We are an owner-operated GTA excavation contractor with a fleet that covers everything from a 1.5-tonne mini-excavator for a Glen Williams side-yard to full-size machines for Acton lot grading and rural driveway rebuilds. We carry $5M liability, our operators are full-time staff, and we run a tight site — clean fence lines, daily haul, and no surprise change orders. For Halton Hills owners that means one number to call from the first walk-through through final backfill: 416-317-3090.
You can read more about our broader excavation services across Toronto and the GTA, our foundation waterproofing work, and our trenching and post-drilling services.
Halton Hills excavation FAQ
Do I need a Niagara Escarpment Commission permit for an addition in Halton Hills?
If your property sits inside the Niagara Escarpment Plan area, most cut, fill, grading, and new structure work needs an NEC Development Permit before the Town will close out the building permit. Heritage District properties in Glen Williams or Stewarttown can also trigger a heritage permit. We confirm overlays before we mobilize so the excavator does not sit idle waiting for paperwork.
How deep do footings go in Halton Hills?
The Ontario Building Code requires footings a minimum of 1.2 m below finished grade for frost protection. On Halton Hills clay-loam we usually dig a touch deeper for drainage tile and weeping clearance, and on escarpment limestone we set on prepared rock with engineer sign-off. Lot grading typically targets a 2 percent minimum slope away from the foundation.
Who regulates the Credit River and Sixteen Mile Creek in Halton Hills?
Credit Valley Conservation regulates the Credit River watershed running through Georgetown, Glen Williams, and Norval. Conservation Halton regulates the Sixteen Mile Creek headwaters on the Acton and west side. Both work under Ontario Regulation 41/24, with regulated buffers typically 15-30 m from stable top of bank, wetland, or floodplain. Either authority can require a permit before we break ground.
Can you handle septic and culvert work on a rural Acton lot?
Yes. We excavate septic tank pits and weeping beds on rural Acton, Limehouse, and Stewarttown properties, and we install entrance culverts sized to the Town of Halton Hills entrance permit. We coordinate with the licensed septic installer and the Town inspector so the bed, the tie-in, and the driveway sequence line up cleanly.
How long does a foundation dig in Georgetown take?
A typical Georgetown foundation excavation runs 2 to 5 working days for the dig itself, depending on lot access, depth, and whether we hit limestone or a high water table near the Credit River. Add a day for haul-out of clay-loam spoils and a day for grading prep. We hand off to the foundation crew with a clean, square, dewatered hole.
Get a free Halton Hills site visit
Call 416-317-3090 or request a free quote and we will walk the Halton Hills property, flag any NEC, CVC, Conservation Halton, or heritage overlays, and price the dig with no guesswork.