Lot Grading Plan illustrate the location of proposed new grading patterns around a new structure on a property. These plans will depict drainage patterns and if necessary new swales, retaining walls, and other features to ensure sufficient surface drainage. These plans are often required as part of a building permit submission to ensure that new building construction will result in proper drainage and prevent any negative impact on adjoining properties. After all construction and landscaping is completed, a site inspection will be conducted to ensure that the lot grading follows the plan prepared earlier, and the Ontario Land Surveyor will issue a Lot grading Certificate.