A grading plan is a fundamental component of a development application that defines how a site will be shaped to manage drainage, access, and building integration.

It establishes proposed elevations, slopes, and drainage patterns to ensure that stormwater is safely conveyed across the site without causing ponding, flooding, or impacts to adjacent properties.

Key Functions

A grading plan ensures:

• Positive drainage away from buildings

• Controlled stormwater flow to approved outlets

• Compatibility with adjacent lands (no adverse impacts)

• Integration with servicing design (storm, sanitary, and water systems)

What It Typically Includes

• Existing and proposed elevations

• Finished floor elevations (FFEs)

• Swales and overland flow routes

• Slopes and drainage directions

• Retaining walls and grading transitions

Why It Matters

Grading directly affects:

• Site functionality and constructability

• Stormwater management performance

• Compliance with municipal requirements

• Approval timelines

Poor grading design is a common source of revisions and delays.