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The diagrams below illustrate the basic lot grading requirements for all 5 different lot types of single-family and duplex.

Lot Type A

Rear to front surface drainage. (2-3% overall slope)

Lot Type A diagram
Grading Details

Lot Type B

Rear to front surface drainage. (3-6% overall slope)

Lot Type B diagram
Grading Details

Lot Type C

Rear to front surface drainage. (>6% overall slope)

Lot Type C diagram
Grading Details

Lot Type D

Standard split surface drainage. (1.5% overall slope)

Lot Type D diagram
Grading Details

Lot Type W

Split surface drainage for walkout basement.

Lot Type W diagram
Grading Details

Other Related Requirements

Critical Swale Standards for "Rear to Front" surface drainage (diagram)

Critical Swale Standards for "Split/Front to Back" surface drainage (diagram)

Infill Common Drainage Swale - (Detail B shows with retaining wall)

Splash Pad which carries roof leader and sump pump discharge away from foundation wall

Downspout which carries surface water from eavestroughs to drainage swales

Typical Side-Lot Landscaping shows landscaping requirements on finish grade level

Lake, Ravine, and Top of Bank Lots shows the cross-section of the requirements

For More Information

Development Services, Lot Grading

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

T5J 0J4

Telephone

311

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

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