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Grading and erosion control in Rohnert Park

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

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

What Rohnert Park's code says

Rohnert Park code What Rohnert Park's code adds
Erosion control plan
  • An erosion and sediment control plan by a civil engineer or qualified professional must accompany the grading permit application.
    Applies: Grading that needs a permit; not required when no grading permit is needed.
    § 15.52.030 · code text
    An erosion and sediment control plan (plan), prepared by a registered civil engineer, or other professional who is qualified to prepare such a plan, shall be submitted with a grading permit application
  • An interim plan is needed before each rainy season: submit by September 15, measures in place by October 15.
    Applies: Projects that need a final erosion control plan.
    § 15.52.030 · code text
    An interim plan is required prior to each rainy season during construction for a project for which a final plan is required by this chapter.
When a grading permit is needed
  • A grading permit is needed for more than 50 cubic yards of digging or fill.
    Applies: Smaller work also needs one if it exceeds the depth, slope or drainage limits, or is in or next to a natural drainage channel.
    § 15.50.030 · code text
    An excavation of fifty cubic yards or less which is less than two feet in depth
Grading without a permit
  • Exempt, 50 cubic yards or less: digs under 2 feet; fills under 2 feet on ground flatter than 5:1.
    Applies: Or digs with no cut slope over 4 feet and steeper than 2:1. Fills: no structures, no blocked drainage. Not phased; not near natural channels.
    § 15.50.030 · code text
    A fill of fifty cubic yards or less which is less than two feet in depth and placed on a slope, flatter than five horizontal to one vertical, not intended to support structures, on a single lot or parcel, and does not obstruct a drainage course or alter the drainage of neighboring properties and is not part of a phased grading operation
  • No permit for basement, footing, pool or structure digs under a building permit, retaining walls, or permitted wells and tanks.
    Applies: Tanks up to 10,000 gallons; no unsupported height over 5 feet; not in or next to a natural drainage channel.
    § 15.50.030 · code text
    Excavations for wells or underground storage tanks no greater than ten thousand gallons in size when work is being done under the authority of a valid county well permit or city building permit;

Who this affects

HomeownersContractorsDesigners

Frequently asked questions

What are the grading rules in Rohnert Park?

Rohnert Park's code: A grading permit is needed for more than 50 cubic yards of digging or fill. (Smaller work also needs one if it exceeds the depth, slope or drainage limits, or is in or next to a natural drainage channel.) (§ 15.50.030); An erosion and sediment control plan by a civil engineer or qualified professional must accompany the grading permit application. (Grading that needs a permit; not required when no grading permit is needed.) (§ 15.52.030).

General information, not legal advice.

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Rohnert Park Municipal Code — full text