
Under what conditions are the Real estate taxes appraised in San Francisco
Under California Constitution Article XIII 'a' real estate taxes is apprised or reappraised only when there is a change in ownership of the property. It is also reappraised when a pending construction is completed.
All changes that are not related with normal maintenance make the property liable for revaluation and tax reappraisal. The condition however is that the tax rate will not be increased more than 2% annually than the existing tax rate paid. This is called a supplemental assessment. It reflects the basic difference between the existing value of the property to the old value of the property before changes in value or ownership.
http://www.city-data.com/forum/san-francisco/135730-sf-property-taxes.html
http://www.sfgov.org/site/assessor_index.asp?id=92
http://www.sfgov.org/site/assessor_index.asp?id=92#TOPA

