Catch basin and storm drain installation typically costs $1,500 to $4,000 per catch basin, including the structure, connecting pipe, and excavation, depending on depth, pipe run length, and connection to an existing storm system. Treat every figure on this page as a starting point rather than a quote: a catch basin only works as part of a complete system, so its placement, pipe sizing, and outlet connection all need to be designed together, not installed as an isolated fix for a single wet spot.
A catch basin collects surface water runoff at a low point and channels it through underground piping to a discharge point, whether a municipal storm sewer, a detention pond, or a daylight outlet. Its effectiveness depends entirely on the pipe network moving that water away efficiently once it's collected.
What actually drives the price
Depth and pipe run length are direct cost drivers, since deeper installations and longer connecting pipe runs to the outlet mean more excavation and material. A catch basin needing to tie into a distant existing storm system costs more than one with a short, direct connection available.
Catch basin capacity and grate type need to match the volume of water the area actually generates during peak storm events, and undersizing a catch basin for its drainage area means it gets overwhelmed and stops functioning exactly when it's needed most.
Number of basins and how they're networked together matters on larger sites, since commercial and multi-basin residential systems need pipe sizing and slope calculated across the whole network, not just each individual basin in isolation.
Outlet capacity and connection type affect both design and permitting. Connecting to a municipal storm system typically requires permit approval and confirmation that the existing system has capacity for the added flow, while a private outlet, like a detention pond, has different design requirements entirely.
Maintenance access
Catch basins need periodic cleaning to remove accumulated sediment and debris, so accessible placement and proper grate design matter for long-term function, not just initial installation. A basin buried or placed where maintenance access is difficult becomes a recurring problem.
A short checklist before you book
Confirm catch basin placement and capacity match the actual drainage area being served. Confirm pipe sizing and slope are calculated for the whole connected system, not one basin at a time. Check outlet capacity and whether municipal permit approval is needed. Confirm maintenance access to each basin for future cleaning. Assess depth and pipe run length to the outlet before finalizing scope.
Costs vary by site conditions. Use the ranges here to sanity-check what you're quoted, then get a direct price for your own property.
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