Berkeley permits unlimited extended home-share nights when the host stays onsite and rents only a portion of the dwelling, recognizing roommate-style arrangements as distinct from whole-home rentals.
BMC 23.328 distinguishes hosted home-shares from unhosted rentals. When the host occupies the dwelling and rents only a private room or portion, there is no annual night cap. The arrangement still requires an STR permit, transient occupancy tax collection, and compliance with the Rent Stabilization Board if the unit is otherwise rent-controlled. Berkeley adopted this carve-out to support homeowners offsetting mortgage costs while preventing conversion of full units to tourist use. Hosts must keep guest registers for one year.
Failing to register an extended home-share, omit transient tax, or maintain guest logs leads to fines starting at 250 dollars and rising to 1,000 dollars per repeat violation.
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