I believe it is called an 'ad valorem' tax in the detailed MF bill (at least it was for last years WKORV MF bill). If you are looking to write it off in your taxes - it has been discussed here (by Bill if I recall correctly) - that this cannot be done per IRS code. Only taxes charged separately from the MF bill can be applied to your itemized deductions. If your tax situation in CA is like ours - it will not be worthwhile due to AMT reducing/eliminating the ability to write-off property taxes (it let's you do it - but if your income is too much it will be negated).