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Design grades at specific locations for each lot are shown on the Lot Grading Plan. The Lot Grading Certificate has as-built elevations shown at the same locations for the specific lot.

The grades are acceptable if constructed within the acceptable tolerances:

  • For Rough Grade, the grade has to be constructed between 7 cm and 20 cm below final grade for clay.
Example of acceptable tolerance at Rough Grade stage:

Design Grade

As-built Grade

Grade Difference

682.25 m

682.10 m

15 cm below Design Grade


  • For Final Grade, the grade has to be constructed between 0 cm and 10 cm below final grade for topsoil (black dirt).
Example of acceptable tolerance at Final Grade stage:

Design Grade

As-built Grade

Grade Difference

682.25 m

682.20 m

5 cm below design grade

Note: "0 cm" is at approved design grade.

  • For finished landscaping, such as sod or concrete, the grade has to be constructed between -10 cm and +10 cm below or above final grade.
Example of acceptable tolerance at finish landscaping:

Design Grade

As-built Grade

Grade Difference

682.25 m

682.30 m

5 cm above design grade


Note: At Final Grade, the surface elevations below the decorative rock, washed rock or wood chips, must be within the acceptable tolerance. The Lot Grading Inspector has the discretion to accept elevations that are not within tolerance when:

  • The lot is graded to match an existing walkway, lake, park, curb, sidewalk, road or lane and a positive surface drainage is maintained.
  • The lot is graded to match an adjacent property and has positive on-site surface drainage which also works with adjacent properties.

For More Information

Development Services, Lot Grading

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

T5J 0J4

Telephone

311 or 780-496-5576

Fax 780-496-2865
Email lot.grading@edmonton.ca

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