Richmond Hill · Study requirementswritten
Published by City of Richmond Hill under Site Alteration Permits
Division D of the City of Richmond Hill's Standards and Specifications Manual, covering grading and local drainage for new or redeveloped lots and blocks. It sets the numeric criteria a design is checked against — a 2.0% to 5.0% acceptable grading gradient, a 10% ceiling on average rear-yard slope before a retaining wall comes into play, swale depths and maximum drainage areas, and driveway gradients capped at 5.0% (up to 7.5% with written justification) — alongside construction specifications, City standard drawings, and adopted Ontario Provincial Standard Drawings for fencing.
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