WalletClearly

๐Ÿ”ง French Drain Cost Calculator

Estimate the cost to install a French drain. Covers perforated pipe, drainage gravel, landscape fabric, and an optional catch basin.

Project Details

Total length of the drainage trench

Depth of the trench โ€” deeper drains handle more water volume

1 = add a catch basin at the inlet to intercept surface runoff

Your Estimate

Enter your details and hit Calculate to see results.

Pro Tips

  • French drains need a minimum 1% slope (1 inch drop per 8 ft) โ€” confirm grade before digging
  • Wrap the perforated pipe in sock fabric before placing it to prevent silt from clogging holes
  • Discharge to daylight, a dry well, or storm drain โ€” never terminate in a closed space
  • Use 3/4 inch clean washed gravel, not crusher run โ€” fines migrate into pipe and block it