Accessory Dwelling Units

A Guide to Accessory Dwelling Units in San Marcos

On April 17, 2018 the City of San Marcos adopted a new development code expanding the ability for owner occupied, single family properties to construct accessory dwelling units.  This guide has been written to assist home owners and professionals wishing to construct an accessory unit on their property.

This short and informative document provides guidance about the following common questions surrounding the construction of an accessory dwelling including:
  • Ownership and Location Requirements
  • Site Requirements
  • Building Standards
  • Permit Process