1) The National Taxpayers Union estimate that up to 60% of properties in Alameda and Contra Costa County are over-assessed.  That is the County has placed a value on your home (thus tax) that is greater than the value of similar homes in your neighborhood that have recently sold. 2) Property Taxes in all but four cities in Alameda County actually went up in 2011-12. 3) Less than 5% of home owners appeal their property taxes, about two-thirds win their appeals. 4) Even a small reduction in your home’s assessment …