For an increase of 10% or less within 12 months, the landlord must give 30 days' written notice. For an increase over 10%, 90 days' written notice is required. (AB 1482 limits how much, separately from these notice rules.)
Civil Code §827 governs the notice period for rent increases on month-to-month tenancies: 30 days' written notice for a cumulative increase of 10% or less in the prior 12 months, and 90 days' notice for any increase above 10%. These notice rules are separate from the AB 1482 cap on the amount. Notice must be properly served (personal delivery, or mail with added days). For fixed-term leases, rent cannot be raised mid-term unless the lease allows it.
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