Automatic Reassessment Owner Initiated Reassessment Owner Initiated Appeal  
California County Yes/No Reassessment Details Form to Request Reassessment  Reassessment Dates Appeal Contact/Form Appeal Dates Additional Information
Alameda Yes All homes purchased between 1/1/02 - 12/31/08. Owners notified by mail by July 2009 with reassessed home value. Link to form Deadline is 4/15/10, however owner should submit starting in July 2009 to receive prompt evaluation. Contact Assessment Appeals Board at 510-272-6352 or submit form File between 7/2/09 - 9/15/09 If homeowner wants to dispute assessment, review will not occur until after July 2009. If homeowner does not agree with automatic reassessment, they should submit both Request for Reassessment form and Appeal form immediately.
Contra Costa Yes Owners notified by mail by July 2009 with reassessed home value. Criteria for homes being reassessed  has not been determined. In prior years homes reassessed were purchased 1/1/99 and forward. Link to form File by 11/30/09 Contact Assessment Appeals Board at 925-335-1901 or submit form File between 7/2/09 - 11/30/09 If homeowner disagrees with automatic reassessment, submit Request for Reassessment Form not Appeal form. 
Los Angeles Yes Over 500,000 single family houses and condos purchased between July 2003 and June 2008 will be reviewed. In some areas, earlier purchases will be reviewed.  Link to form File by 12/31/09 Call Assessment Appeals Board: 213-974-1471. 2009/2010 will be available at this link appx 4/2009.  File between 7/2/09 - 11/30/09 Website to locate comparable prices
Marin Yes Criteria for reassessment not finalized. Owners notified by mail by July 2009 with reassessed home value. Link to form File by 12/31/09 Call Appeals Board 415-499-7345 or Submit form File between 7/2/09 - 11/30/09 Website to locate comparable prices
Monterey Yes Review of entire county will be conducted starting 4/1/09. Properties to be reviewed to be based on comparable sales in certain areas between 10/31/08 - 3/31/09. Owners to be notified by mail by 6/30/09. Link to form Owners should wait to file until 7/09 after automatic reassessment review is complete. File by 12/31/09. Contact Assessor's Office (831)755-5035 prior to submitting form. File between 7/2/09 - 11/30/09 and within 60 days of notice of assessment. Comparable sales should have occurred between 10/01/08 - 3/31/09.
Napa Yes County has reduced the value of 5700 properties as of 1/1/08. Will be reviewing most single family residences including condos sold between 4/1/08 - 3/31/09. Will also review all single family residences in homogeneous subdivisions without regard to date purchased. Owners notified by mail in July 2009.  Call 707.253.4459 or email jtuteur@co.napa.ca.us to begin informal review process. File by 5/15/09. Submit form File by 11/30/09  
Orange Yes Review includes homes purchased from 1/1/05 to current date, however not all homes with this criteria will be reviewed. Owners should submit Informal Request for Review to guarantee review of property value. Link to form File by 4/30/09. Contact County Assessor if questions 714-834-2727. Contact Clerk of the Board 714-834-2331 prior to submitting form. File between 7/2/09 - 9/15/09 Appeals application can be stored online and sent electronically by registering at the link provided for the Appeals form. Form can also be submitted through regular mail.
Placer Yes Review includes all homes in county. Owners notified by mail in July 2009. Decline in value application will be available July 2009 at this link, or by calling 530-889-4300. TBD Call Assessment Appeals Clerk at 530-889-4020 if questions. Submit form. File between 7/2/09 - 9/15/09  
San Diego Yes A limited number of homes will be reassessed by the County Assessor, however owners should not wait until notification and should initiate reassessment with the "Application for Review of Assessment" form. Link to form File by 5/30/09 Call Assessor's Office 858-505-6262, submit form. File between 7/2/09 - 11/30/09 Comparable sales should have occurred between 10/01/08 - 3/31/09.
San Francisco No   Available at this link on 4/1/09 TBD Contact Assessment Appeals Board (City Hall, Room 405) (415) 554-6778 or submit form.   File between 7/2/09 - 9/15/09  
San Mateo TBD (not currently scheduled)   Link to form File by 12/31/09 Contact Assessor's Office within 15 days of assessment notice. Call (650) 363-4573 to file with Clerk of the Board of Supervisors at the County Government Center.      
Santa Barbara Yes A limited number of homes will be reassessed by the County Assessor, however owners should not wait until notification and should initiate reassessment with the "Request for Informal Review" form. Scroll to bottom of page for "Request for Informal Review" form File by 11/1/09 Call County Asssessor's Office before filling form 805-568-2550, then contact Assessment Appeals Board at 805-568-2240, see attached form. File between 7/2/09 - 11/30/09  
Santa Clara Yes Owners notified by mail during last week of June 2009 with reassessed home value. County will not disclose criteria for which homes are to be reassessed. Link to form File by 8/15/09. Owner should be notified within 30 days of request date. Submit form (includes instructions). Pay $30 filing fee. File between 7/2/09 - 9/15/09 After 8/15/09 or if the Assessor does not agree to a reduction, you must file a “formal” appeal with the Assessment Appeals Board to request a reduction.  
Santa Cruz Yes In process of finalizing criteria for which homes will be reassessed. 2008 assessment reviewed homes sold between 1/1/05 - 9/30/07 (6200 properties). 2009 assessment will cover a larger number of properties. Focus will be in certain regions and in some areas will go back earlier than 2005. Owners will be notified by mail in July/August 2009. Call Assessor's Office before filing form: 831-454-2002.  File by 12/31/09 Call Assessor's Office before filing form: 831-454-2002.  File between 7/2/09 - 11/30/09  
Sonoma Yes 35,000 - 40,000 homes in declared city limits. Owners notified by mail by mid-August 2009 with reassessed home value. Link to form File by 10/31/09 Contact Assessor's Office: (707) 565-1888 and/or submit form File between 7/2/09 - 11/30/09 If your property assessment was temporarily reduced as a "Decline in Value" for 2008-09, you do not need to reapply to have it reviewed for 2009-10. Next year's review will be done automatically by the assessor.
Ventura Yes Review covers homes purchased 1/1/05 to current date. Owners to be notified by mail by early July 2009. Link to form File by 12/31/09. Contact County Assessor 805-654-2181 if questions. If no response to informal request by 7/30/09 or you disagree with response, file Appeals form by 11/30/09. Form available on 7/2/09. Contact Assessment Appeals Board 805-654-2251. File between 7/2/09 - 11/30/09 If owner disagrees with assessment review from automatic reassessment, contact Appeals Board to submit Appeal application instead of filing informal request.
Yolo Yes Review includes residential properties purchased after 1/1/03 to current date. Residential properties outside the parameters can contact the Assessor's Office at 530-666-8135. Owners can check http://www.yolocounty.org/ in mid-July 2009 for reassessment value and will be notified by mail in the tax bill sent in 10/09.   No formal form is needed. Contact Assessor's Office.   File by 5/30/09 Contact Assessor's Office. For questions contact Assessment Appeals Board (530) 666-8195. Submit form. File between 7/2/09 - 11/30/09