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A sloped surface is required to effectively drain water away from all foundation walls and concrete slab-on-grade buildings, including areas underneath steps and decks.

Minimum Grade Requirements

  • 10% for first 2 metres with a minimum of 20 cm drop for final landscaping
  • 5% for the first 2 metres (slab-on-grade) with a minimum 10 cm drop for final grade on soft landscaping
  • 0.75% for concrete, asphalt, or other impervious surface treatment

The Lot Grading Drawings page illustrates the minimum grade information for different lot types in PDF formats.

Grading Examples

For More Information

Development Services, Lot Grading

2nd Floor, Edmonton Tower
10111 104 Avenue NW
Edmonton, AB

T5J 0J4



Fax 780-496-2865

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