Cal. Sts. & High. Code § 2851

The clerk of the legislative body shall give notice of the hearing by mailing a copy of the notice, postage prepaid, to all persons owning real property which is proposed to be assessed to pay any part of the cost of the work, whose names and addresses appear on the last equalized city or county assessment roll, as the case may be, available on the date the report is commenced, at his address as shown upon such roll or as known to the clerk.