Measure P would cost the property owner approximately $40 per $100,000 of assessed (not market) value. The assessed value is based on the original purchase price of the home and adjusted each year by the Consumer Price Index not to exceed 2%. The estimated cost for the first annual assessment is $272 based on the average assessed value of $680,000 for a single family home in Foster City. The $2,000-$3,000 estimate is based on conservative flood insurance estimates provided by insurance industry professionals.