Commercial drainage work in Ontario for 2026: catch basin cleaning $150–$400 per basin, top rebuilds $1,500–$4,000, full replacements $3,000–$8,000, and trench drains $100–$250 per linear foot installed. Water is patient and salt-season water is destructive — here's what each fix costs and which problems can't wait.
Average Drainage Costs in Ontario (2026)
| Service | Typical 2026 price |
|---|---|
| Catch basin vacuum cleaning | $150–$400 per basin |
| Camera inspection of storm lateral | $300–$700 |
| Grate/frame reset | $800–$1,800 |
| Catch basin top rebuild | $1,500–$4,000 |
| Full catch basin replacement | $3,000–$8,000 |
| Trench drain installation | $100–$250 / linear ft |
| Storm lateral flushing/jetting | $350–$900 |
Multi-basin route pricing is the quiet saver: a plaza with six basins pays far less per basin on an annual cleaning route than calling one-off when a basin backs up during a storm — and scheduled cleaning is when we catch the $1,500 rebuild before it becomes the $8,000 replacement.
Why Catch Basins Fail in Ontario
Frost is the main villain. Water saturates the soil around the basin barrel, freezes, and jacks the structure — a few millimetres a winter. Meanwhile plows clip proud grates, salt eats the mortar between precast sections, and sand fills the sump until there's no settling capacity left and debris flows straight into the outlet pipe. The visible symptom is almost always the settled asphalt ring; by then the upper barrel joints are usually open and washing fines into the base of your asphalt — which is how a drainage problem quietly becomes a paving problem.
What Affects Your Quote
Depth and connections. A shallow basin with one outlet is a straightforward dig. Deep basins, multiple laterals, or proximity to gas and hydro locates extend excavation time. Ontario One Call locates are required before any dig — build a week of lead time into planned work.
Season. Emergency winter work costs more: frozen ground, traffic protection around ice, and temporary patching that must be redone properly in spring. The economical calendar is inspection and cleaning in spring, structural repairs in summer, and a final leaf-season cleaning in late fall.
Surface restoration. Every basin repair ends with asphalt or concrete restoration around the structure. Matching into sound asphalt is quick; if the surrounding area is alligatored, we'll recommend patching a proper apron — slightly more now, but it stops the settlement ring from reopening next winter.
Water destination. Where downspouts and surface water discharge matters. Roof leaders dumping beside a foundation or across a walkway (winter ice rink, guaranteed slip claims) often get rerouted into the storm system as part of the same project — see our catch basin flooding guide for the common failure patterns.
DIY vs. Professional: The Real Comparison
Facilities staff can lift a grate and scoop leaves — genuinely useful in October. Everything below the grate is contractor territory: vacuum trucks for sump material (which municipalities treat as regulated waste, not dumpster filler), jetting for laterals, and excavation with shoring for structural work. The liability line is sharper here than most trades: a collapsed basin or a flooded neighbouring unit traces directly to maintenance records, and "our janitor looked at it" is not the record you want to produce.
How to Get an Accurate Quote
Count your basins (or send an aerial screenshot and we'll count them), note any that pond or sit low, and we'll quote an annual cleaning route plus any repairs — free site walk included, across Kitchener-Waterloo, Cambridge, and Guelph. Full service details on our drainage services page.
Frequently Asked Questions
How much does catch basin cleaning cost in Ontario?
Vacuum cleaning a commercial catch basin runs $150–$400 per basin in 2026, with route pricing (multiple basins, scheduled annually) at the low end. Neglected basins that are packed solid or need camera inspection of the outlet pipe cost more per visit but far less than the flooding they prevent.
Who is responsible for catch basins on commercial property?
The property owner, up to the point of connection with the municipal system. Basins in your parking lot, their grates, barrels, and the private storm laterals feeding the municipal main are all owner-maintained. After flooding events, insurers and municipalities both ask for maintenance records.
How much does it cost to repair a sunken catch basin?
Rebuilding the top of a settled or frost-damaged catch basin — resetting the frame and grate, repairing the upper barrel, and patching surrounding asphalt — runs $1,500–$4,000. Full basin replacement including excavation runs $3,000–$8,000 depending on depth and pipe connections.
What are the signs of a failing catch basin?
Ponding around the grate after rain, a ring of settled or cracked asphalt (the classic 'birdbath'), a grate sitting low or rocking under traffic, and sinkholes nearby. In winter, ice sheets forming across drive lanes usually trace back to a basin or downspout discharge problem.
How often should commercial catch basins be cleaned?
Annually for most Ontario properties, ideally in late fall after leaf drop or early spring after the sand and salt season. Properties with heavy tree cover, high traffic, or a history of flooding benefit from twice-yearly service. Regular cleaning also keeps sediment out of the municipal system — a bylaw expectation in most cities.