How much does it cost to install a trench drain across the bottom of my driveway in Ottawa?

A trench drain (also called a channel drain) installed across your driveway entrance is one of the most effective ways to intercept water before it flows into your garage or basement. In Ottawa, this is especially important given our intense spring melt and summer downpours.

Typical Ottawa Costs

For a standard residential driveway, expect to pay between $2,500 and $5,500 for a professionally installed trench drain system. This includes cutting into the existing surface, setting the channel, connecting to a discharge point, and patching the driveway. Wider driveways in neighbourhoods like Barrhaven or Kanata where double-car garages are common will be on the higher end. If you need a longer run or heavy-duty grating rated for vehicle traffic, costs can reach $7,000 or more.

How Trench Drains Work

A narrow channel is cut perpendicular to the driveway slope, typically right at the transition between the driveway and the garage floor or at the bottom of a sloped section. A pre-formed channel body sits in a concrete bed, topped with a slotted grate. Water flows along the channel to one or both ends, where it connects to a discharge pipe leading to your yard, a dry well, or the municipal storm system.

Ottawa-Specific Considerations

Our freeze-thaw cycles — Ottawa regularly swings from -25°C to above zero and back in a single week during January and February — are brutal on trench drains. You need a channel rated for Canadian winters with a grate that won't buckle under frost heave. Polymer concrete channels outperform standard plastic in our climate because they resist cracking when ice expands inside the channel. The discharge pipe must be buried below the frost line (at least 1.2 metres in the Ottawa area) or designed to drain completely so trapped water doesn't freeze and block the system.

Grate Selection

Choose a grate with slots narrow enough to handle Ottawa's leaf litter in fall but wide enough to capture high-volume spring melt. Stainless steel or galvanized iron grates handle road salt and sand far better than bare steel, which corrodes quickly after a few Ottawa winters.

Maintenance

Clean the channel twice a year — once after spring melt and once after leaves drop in November. Remove accumulated sand and debris so the system is clear before winter. A clogged trench drain in December means ice buildup and potential flooding during a January thaw.

Reach out through Ottawa Driveways to connect with local contractors who specialize in driveway drainage solutions designed for our climate.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Justyn Rook Contracting
• RenoMotion Inc.
• MAK Construction and Development Inc
• Prism Services
• Humble Homes - property maintenance