Realtors are required by law to inform potential buyers if a home is in a CFD and thus is subject to a special tax assessment. Mello-Roos taxes are usually listed as a line item on a property's annual tax bill, though occasionally a district will send homeowners a separate bill.
For the disclosure of Mello-Roos on new home sales, the best source is the Public Report, commonly referred to as the "White Paper," Section 11010 of the California Government Code that requires disclosure of all indebtedness that is a lien on the subdivision or any part thereof.
This is typically referred to as the “expiration” date. You can find out if/when your Mello-Roos special taxes expire by comparing the line items on your Placer County tax bill with the appropriate Community Facilities District listed on our website and note any expiration date.