PJR-129 Site Plan Requirements for Planning Applications

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Revised 07/10/2018

Site plans are required for Planning applications submitted to Permit Sonoma. The graphic below shows a sample site plan. Some minor Planning applications may not require this level of detail.

Building & Engineering Permits: For Building and other non-Planning site plan requirements, visit CSS-019 – Minimum Standard Site Plan Requirements.


  1. Minimum Standards. All site plans must be meet general architectural or engineering standards and be legible and drawn to scale, including a bar scale. Preparation of the required site plan by a draftsperson, architect, landscape architect or engineer is strongly recommended. Partial site plans for a portion of a property may be submitted as long as a vicinity map for the entire property is provided and other uses shown. The vicinity map will show the full parcel including frontage streets and cross reference the area of the partial site plan. Partial site plans must show all required features as listed below. Aerial photos will not be accepted in lieu of the Standard Site Plan, but can provide useful information to assist in preparing the site plan. All site plans must include a bar scale, north arrow, project name/applicant, name of preparer, date prepared, and date of last revision.
  2. Size and Number of Copies. Provide one electronic copy either on a flash drive or emailed to the project planner and three full-sized site plans (either 24 inches X 36 inches folded to 8.5 inches x 11 inches or 11 inches X 17 inches) and one reduced site plan (8.5 inches X 11 inches).
  3. Existing Structures. Show and label the use of all existing structures and outdoor use areas including pool/spa, patios, parking areas, accessory structures, fences, and retaining walls. Show dimensions of all existing structures and outdoor use areas, their total square footage and distance to all property lines. Identify existing roads, driveways, waterways, drainage features, septic systems including expansion areas, sub drains, wells and underground utilities. Property lines and dimensions supplied by applicant are for representational purposes only and do not constitute an approval of the location by the County. While not required, it is the Owner’s responsibility to have property lines surveyed.
  4. Easements, building envelopes, and covenants. Research the property records and show the location and extent of any easements and their purpose, building envelopes, deed restrictions, agreements, and Covenants, Conditions and Restrictions (CC&Rs) that affect the property. Building envelopes can often be found on the Final Maps of subdivisions available at Permit Sonoma. If no building envelopes are shown, or the property was not created by subdivision, the building envelopes are the required setbacks found in the zoning code for each zoning district “Permitted (Residential Density or Building Intensity) and Development Criteria”. Easements can be found on a title report or by researching records at the County Recorder’s office or a title company.
  5. Proposed Uses, Structures, and Improvements. Identify all proposed uses, structures and improvements and differentiate proposed (dashed lines) from existing (solid). Include outdoor use areas such as, storage areas, patios, parking areas, accessory structures, pools/spas, fences, and retaining walls. Show dimensions of all proposed structures and use areas, their total square footage, distance to property lines, setbacks to septic systems, creeks, wells and other structures. Identify all proposed improvements including driveways, turnarounds, turnouts, areas to be graded, drainage features, power poles, and underground utilities. Identify the types and total number of parking spaces for vehicles, bicycles and electric vehicle charging stations, including accessible spaces and the accessible path of travel if the use is public.
  6. Landscaping and Tree Protection. Show the location and dimensions of all existing and proposed irrigated landscape areas, including square footage and dimensions of all lawn or turf areas. Show all existing and proposed landscape features, such as ponds, pools, berms and hedges. Show the dripline of all trees and the approximate location of all trees by species type that are 8" in diameter or larger within development area. Indicate which trees will be retained or removed and provide a table summarizing the total by species.
  7. Contours1 (lines denoting elevation of terrain) are required for all planning permits involving grading or building construction. Contours shall be shown and labeled at maximum vertical intervals of 10 feet. For areas within flood zones, near or within riparian zones or wetlands a contour interval of 2 feet is required. Contours may be obtained by property survey or can be obtained from the County’s LIDAR survey (add link).
  8. Fire Safe Standards. Site plans must show the width of access roads to and around buildings and turnaround areas for Fire and Emergency services in compliance with Fire Safe Standards required by the Fire Prevention Division.


  1. The Business and Professional Code governs who can produce contours and what licenses are required in the State of California. Permit Sonoma will accept contours produced from the following person(s):
    1. Property owner (Business and Professions Code section 6744)
    2. California licensed surveyor (Business and Professions Code section 8726)
    3. California licensed civil engineer (Business and Professions Code sections 6731 and 6731.1)
    4. California licensed architect (Business and Professions Code sections 6737 and 5500.1)