Primary-Residence-Only Rule
San Diego's home-share licenses, Tier One (20 days or less) and Tier Two (over 20 days), are only issued for the host's own primary residence, not a separate non-owner-occupied unit.
San Diego Home Share Primary Residence Rule
Significant RestrictionsSan Diego Municipal Code § 510.0104(b)(2), (c)(2)
(b)(2) Home share with a Tier One License is only allowed in the host's primary residence. ... (c)(2) Home share with a Tier Two License is only allowed in the host's primary residence.