Accessory Dwelling Unit Ordinance (Secondary Dwellings)

The Board of Supervisors has directed staff to initiate Phase II of an Accessory Dwelling Unit Ordinance to further incentive and remove unnecessary barriers to their development.  As part of this effort, the County will review existing restrictions and limitations on secondary dwellings throughout the unincorporated areas of the County.

On September 12, 2019, the Planning Commission recommended approval of the amendments to the Board of Supervisors with the following changes:

  • Prohibiting ADUs in the Very High Fire Hazard Severity Zone countywide
  • Allowing one ADU on Agriculture and Rural Lands parcels in addition to the two primary dwellings allowed
  • Adding language that an ADU is considered Residential Accessory Use for the purpose of determining land use limitations in Article 9 (Planning Area Standards) and Article 10 (Community Planning Standards)
  • Allowing ADUs in front of the primary residence as long as it still meets the setback requirements

Planning and Building Staff is anticipating that the ADU Ordinance will be heard by the Board of Supervisors in early 2020. 

The Public Hearing Draft of the Accessory Dwelling Unit Ordinance is available as a downloadable PDF. The revisions include strikeouts (deleted text) and underlines (added text). 

You may submit written comments to the attention of Brian Pedrotti, Senior Planner, via email [email protected]. Hard copy correspondence can be sent to the address below.

Project Contacts

Comments and questions regarding the proposed ordinance may be submitted via email to or mailed to the following address:

Department of Planning & Building
ATTN: Accessory Dwelling Unit Ordinance/Brian Pedrotti
976 Osos Street, Room 300
San Luis Obispo, CA 93408

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