The Assessor's office is currently reviewing for decline in value all residential properties of 10 acres or less that were purchased anytime after January 1, 2001. Property owners need not file an application for decline in value for these properties.
If your property does NOT fit in the parameters above please use The Decline in Value Estimator
to determine if you may be eligible for a decline in value.
Additional Information about Decline in value (Prop 8)
Decline in Value Estimator
General Information 
Decline in Value Application 