Sonoma, CA Rental Property Rules: Rent Increase Notice (2026)

045(A). Rather than leaving notice to each park owner, the ordinance centralizes the calculation with the city: the city manager computes the allowable annual rent increase and must post it by February 15th of each year in three places at once, City Hall, the city's website, and a notice board in each mobilehome park, and must also mail it to every park owner and to the mobilehome owner representative in each park. 045(B)(2) requires the owner to post a copy in a prominent place within the park within three work days.

045(E) makes clear that even a properly calculated increase cannot be demanded, accepted, or retained until the landlord separately gives the tenant the notice required under state law, layering the city's local notice scheme on top of, not instead of, the state Mobilehome Residency Law's own notice requirements. 060(D) adds a further notice duty when a new base rent is set following a lawful vacancy or in-place transfer: the owner must give the new tenant written notice of the 12-month anniversary date for future increases.