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Grading and erosion control in Corona

Corona's own rules on grading and erosion control, with the code text for every value.

Ask about grading and erosion control in Corona See coverage

Each rule below links to the section of the Corona Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Corona's code says

Corona code What Corona's code adds
Erosion control plan
  • All work needing a grading permit must have an approved erosion control plan.
    Applies: Unless the City Engineer waives it.
    § 15.36.060 · code text
    Unless waived by the City Engineer, all work requiring a grading permit shall be required to have an approved Erosion Control Plan.
  • Needed when the City Engineer finds erosion or sediment from a project could harm adjacent properties.
    Applies: Based on the City Engineer's finding of harm to adjacent properties.
    § 15.36.060 · code text
    An Erosion Control Plan is required for a project if the City Engineer determines that erosion or sediment discharge from the project could adversely affect adjacent properties.
When a grading permit is needed
  • A grading permit is needed for more than 100 cubic yards.
    Applies: Stockpiling, placing or removing earth on any property.
    § 15.36.030 · code text
    No person shall stockpile, deposit or allow the placement or removal of earth material on or from any real property in excess of 100 cubic yards without first obtaining a grading permit.
Grading without a permit
  • Digging up to 100 cubic yards, under 2 feet deep or no cut slope over 5 feet steeper than 2:1.
    Applies: Fill up to 100 cubic yards: under 1 foot on ground flatter than 5:1, or under 3 feet with no structures; must not block drainage.
    § 15.36.030 · code text
    An excavation not exceeding 100 cubic yards on a single site that is less than two feet in vertical depth or that does not create a cut slope greater than five feet in vertical height and steeper than a two to one (2:1) horizontal to vertical ratio.
  • Digging for permitted basements, footings, retaining walls, pools or other structures; fill made from it is not exempt.
    Applies: Not if unsupported height exceeds 5 feet or unsupported banks exceed 2 feet; the City Engineer may require a minimum-fee permit or soil report.
    § 15.36.030 · code text
    An excavation below finish grade for basements and footings of a building, mobile home, retaining wall, swimming pool or other structure authorized by a valid building permit or construction permit.
Rainy-season limits
  • No grading-permit work from October 1 to May 31 without an approved erosion control plan or City Engineer waiver.
    Applies: Work under a grading permit.
    § 15.36.060 · code text
    No activity authorized under a grading permit shall be conducted between October 1 and May 31 unless an Erosion Control Plan has been approved or the City Engineer has waived the requirement for an Erosion Control Plan.

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What are the grading rules in Corona?

Corona's code: A grading permit is needed for more than 100 cubic yards. (Stockpiling, placing or removing earth on any property.) (§ 15.36.030); All work needing a grading permit must have an approved erosion control plan. (Unless the City Engineer waives it.) (§ 15.36.060).

General information, not legal advice.

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Ask GoCodebook how Corona's grading and erosion control rules apply to your situation and get an answer that cites the section.

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