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GRD-004 Grading Permit Required Application Contents

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This page lists submittal requirements for grading permit applications and a checklist for grading plans.

Version 05/04/2022

Grading Permit Application

Minimum Submittal Information

Must contain the following items:

May also be required, depending on project

  • Letter of authorization signed by the property owner.
  • Soils report if referenced in the plans/drainage report.

Grading Plans

Grading plans shall be of sufficient clarity to indicate the nature and extent of the work proposed and show in detail they will comply will the provisions of the Sonoma County Code (SCC) and all relevant laws, ordinances, regulations, and conditions of approval. Grading work is designated as either “Regular Grading” or “Engineered Grading”. Please refer to the Frequently Asked Questions about Grading and Storm Water at Permit Sonoma to determine grading designations. Grading plans for engineered grading may only be prepared by a civil engineer. Grading plans for regular grading may be prepared by the property owner or a licensed professional acting within the scope of their license. A licensed professional is an architect, civil engineer, landscape architect, professional geologist, or registered professional forester. A valid California seal of professional license and signature is required on all sheets for plans prepared by a licensed professional.

Grading plans shall include the applicable items listed below. Additional information may be required by plan review staff in order to ensure compliance with SCC or to clarify the nature and extent of the work proposed.

Cover Sheet

  • Name of Project and site address
  • Vicinity map and location map of site
  • Assessor’s Parcel Number(s)
  • Purpose statement for project (Regular or Engineered Grading)
  • Property owner name and contact information
  • Plan preparer name and contact information
  • Sheet Index
  • Cut & fill table
  • Amount of disturbed area
  • Amount of New Impervious Surface
  • Reference datum and benchmarks(s)

Grading Plans/Site Plan

  • Limits of grading work clearly delineated
  • Dimensions to property lines & buildings
  • Grades of proposed slopes
  • Cross sections of proposed building pads
  • Cross sections of cuts & fills
  • Areas requiring keying & benching delineated
  • Details & recommendations from soils report

Drainage Improvement Plan

  • Drainage features identified as existing and proposed
  • Subdrains identified as existing and proposed
  • Elevations of inverts, flowlines, top of grates, high points, etc.
  • Drainage specifications (e.g. size, material, length, slope)
  • Structure list for large networks
  • Cross sections of existing waterways
  • Details and recommendations from drainage report

Erosion Prevention and Sediment Control Plan

  • Best management practices (BMPs)
  • BMP details and specifications
  • Protective fencing for waterways and sensitive areas
  • Limits of disturbed areas (total work) clearly delineated including temporary features such as BMP locations, staging areas, material stockpiles, construction accesses, etc.


  • Seal and signature of licensed professional
  • Permit Number
  • Date of plan preparation
  • Identification of sheet number (#) of total number of sheets (#) in lower right corner
  • Space for permit number and approval stamps in lower right corner
  • Drawn to an engineering scale no less than 1 inch = 40 feet
  • North arrow and scale (written and graphic)
  • Legend and list of abbreviations
  • Property lines identified on all pertinent views and details
  • Right-of-ways identified on all pertinent views and details
  • Easements identified on all pertinent views and details
  • Contours and elevations identified as existing and proposed
  • Buildings identified as existing and proposed
  • Finished floor elevations of all relevant buildings
  • Sonoma County standard notes for grading permits
  • Required Standards on separate page
  • All other pertinent grading construction notes and details

Driveways and Roads

  • Centerline stationing (construction alignment)
  • Profiles with existing and proposed grades
  • Cross sections (minimum of every 50 feet)
  • Typical structural section detail(s)
  • Driving surface cross slopes
  • A Traffic Control Plan is required if any work takes place impacting any private road

Other Relevant Information

  • Assessor's Parcel Numbers for adjacent lands
  • Any applicable setback requirements
  • Special flood hazard areas or geologic hazard areas delineated
  • Wetlands or sensitive areas delineated
  • NPDES MS4 permit provisions met
  • Reservoir standards met
  • Terrace standards met
  • Non-storm drain utilities information (for reference only)
  • Wells and septic systems identified as existing and proposed (for reference only)