Drainage & French Drain Installation in Richmond Hill

OCM Excavation & Construction designs and installs drainage systems across Richmond Hill — weeping tile, French drains, exterior foundation drainage, catch basins, sump pump tie-ins, and grading swales. Wet basements and saturated yards in Richmond Hill are rarely a fluke. They are usually clay soil, a high water table, or a grading detail that was never finished correctly. Call 416-317-3090 to book a site visit and we will tell you what the lot is actually doing with water.

Richmond Hill is a hydrologically split town. North of Bloomington Road the land sits on the Oak Ridges Moraine — sandy, permeable, and a recharge zone for half the GTA’s headwaters. South of Elgin Mills and along the Yonge Street corridor, lots run on dense glacial clay that holds water against foundations for weeks after a heavy storm. East-side properties drain into Rouge River and German Mills Creek tributaries, which puts them inside TRCA-regulated areas. Each of those conditions calls for a different drainage approach.

We have been excavating across Richmond Hill from Bayview Hill to South Richvale to Oak Ridges since the company started, and we know which neighbourhoods need which solution. A Jefferson side-yard with a failed swale is not the same job as a Mill Pond heritage basement with no exterior membrane. We size the system to the lot.

Drainage Services We Install in Richmond Hill

• Weeping tile (perimeter foundation drainage): 4-inch perforated PVC or rigid pipe laid against the footing in clean stone, wrapped in filter fabric, tied to a sump or storm connection. Standard on every new foundation; retrofit on older Richmond Hill homes where the original clay tile has crushed or silted up.
• French drains: Gravel-filled trench with perforated pipe used to intercept surface and shallow subsurface water before it reaches the house. Common across Bayview Hill estate lots and Oak Ridges grade transitions.
• Exterior foundation drainage: Full excavation to footing, dimple membrane or sprayed waterproofing, new weeper, drainage stone, and a clean backfill. The only permanent fix for chronic basement leaks on clay-soil lots south of Elgin Mills. See our foundation waterproofing service for the full scope.
• Catch basins and area drains: Low-spot collectors in driveways, window wells, and side yards, tied into the storm system or a dry well where the lot allows.
• Sump pump tie-ins: New pit, primary pump, battery backup option, discharge routed to daylight or storm — not to the sanitary lateral, which is against Richmond Hill code.
• Grading and swales: Re-shaping the rear and side yards to push water away from the foundation. Often paired with drain tile under the swale on tight Richvale infill lots.

Permits, By-laws, and TRCA in Richmond Hill

Richmond Hill’s Property Standards By-law requires that drainage on private property be maintained so that water does not pond against the building or discharge onto a neighbour. That clause is what gets cited when a neighbour complaint triggers a property standards order. Designing the system to direct water to the front swale, rear of lot, or a legal storm connection is the part that keeps you out of that file.

For larger jobs that move meaningful volumes of soil or change the lot grade, Richmond Hill’s Site Alteration By-law 47-25 can trigger a permit. Foundation drainage retrofits and standard French drains usually fall under the residential threshold; full backyard regrading on an infill teardown does not. We confirm before we dig.

Lots backing onto Rouge River, German Mills Creek, or their tributaries are inside TRCA’s Regulation 41/24 area. Any drainage outlet, regrading near the top-of-bank, or fill placement needs TRCA review before a Richmond Hill permit will be issued. We have walked enough east-side Richmond Hill sites to know which streets sit inside the regulated boundary.

How We Approach a Richmond Hill Drainage Job

1. Site visit. We walk the lot during or right after rain when possible, find the low points, and check the existing downspout and sump discharge.
2. Locates and utility scan before any excavation. See our trenching and post-drilling services for the equipment we run.
3. Excavation to footing or to the trench depth required by the design.
4. Install — pipe, stone, filter fabric, membrane where applicable, backfill in lifts.
5. Re-grade and restore. Sod, gravel, or interlock back to original.

If the job needs a larger machine or full perimeter dig, our Richmond Hill excavation crew handles the heavy side.

Frequently Asked Questions

Do I need a permit for drainage work in Richmond Hill?

Most residential weeping tile and French drain installs do not require a building permit on their own. Richmond Hill’s Site Alteration By-law 47-25 can apply once you start moving meaningful volumes of soil or changing the lot grade, and TRCA review is required for any work near a regulated ravine or watercourse. We confirm the permit picture for your specific lot before digging.

How deep is a French drain in Richmond Hill clay?

For a yard French drain on Richmond Hill clay we typically install at 3 to 4 feet of depth. Foundation perimeter drains go deeper — down to the footing, often 6 to 8 feet on a full basement. Clay holds water at the surface, so the drain has to sit below the saturated zone with stone and filter fabric all the way up so it actually pulls water in rather than getting choked off.

Will my existing sump pump tie into the new drain?

Usually yes. If the pump is sized for the new flow and the pit is in reasonable shape we tie in the new weeping tile and route discharge to daylight or to the storm connection. If the pit is undersized or the pump is at end of life we recommend replacement during the same dig — it is the right time to do it. Discharge to sanitary is not allowed under Richmond Hill code.

How long does a drainage project take?

A standalone French drain or catch basin job in Richmond Hill is usually 1 to 3 days. A full exterior foundation drainage retrofit with new weeper, membrane, and backfill is typically 3 to 5 days for an average single-family lot, longer if access is tight or if landscaping needs to be cut and restored. Weather and TRCA review timelines can extend that.

What does drainage work cost in Richmond Hill?

Most Richmond Hill drainage projects we quote land between $4,000 and $12,000. A targeted French drain or catch basin install sits at the low end. A full exterior foundation drainage retrofit with waterproofing, new weeper, and restoration sits at the high end. Sites with deep digs, restricted access, or TRCA conditions are quoted individually. Every quote is itemized so you can see exactly what you are paying for.

Get a Drainage Quote in Richmond Hill

If your basement is wet, your yard is holding water, or you are renovating and want to fix the drainage while the ground is open, this is the time to call. OCM Excavation handles drainage and French drain installation across every Richmond Hill neighbourhood — Bayview Hill, Mill Pond, South Richvale, Jefferson, Oak Ridges, Observatory, and Doncrest. Call 416-317-3090 or use our free quote form and we will be on site within a few days.

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