The assessor's office has already re-valued a large number of homes purchased 2005 and after. I would call the Assessor's office and ask them if yours was one. It should have been.
I have a referral if you need one, she does primarily corporate tax appeals. Call the assessor first. See the link below.
I disagree with the prior answers as that is what the assessors want you to do.... go it alone..... so you are stuck with there results if they disagree. As a state licensed appraiser also I have provided the requirements to assist in getting your tax bill reduced for many clients and sending a report attached certified to the assessors with provided information does in fact get thre attention.
I have done property reassessments for clients and suggest submitting an appraisal along with the required form to the assessors office. I also send it certified which puts them on notice you mean business and you have proven your case. I am a state licensed appraiser and we have done this before, but its up to you to prove, not the assessors. Most people give up and don't take this seriously, which is what they hope most people do. Feel free to call or email me your address and I will let you know what I see the taxes should be and what I could provide.
You do not need a firm or even a professional appraiser to do this. Just get comparable sales together & follow the instructions on the Tax Assessor's site; forms are available on site too.
You don't need a firm to try to reduce your bill what you need is a limited reappraisal for reassessment of your tax liability. A reputable, licensed Appraiser can help you with the appraisal and the form necessary to petition to have your tax liability is available through the County of Los Angeles Property Tax Assessors Office http://assessor.lacounty.gov/extranet/default.aspx. Click on the link at right to download the form.
If you would like a referral to a reputable appraiser who can do the limited Appraisal for you I would be happy to suggest that you give Lonn Apfel a call at 909-989-9000 Pager: 909-399-6028. He has been a licensed appraiser for upwards of 20 years and is also a licensed Real Estate Broker (honest as the day is long, and one heck of a nice guy :-). Tell him Tisza recommended you give him a call.
I hope that helps. Take care and have a great day!
Tisza Major-Posner, Realtor, IVPG Realty (909) 837-8922
You can do it yourself. You just need to complete the form Decline of Value. This is available at the County Assessor's site. You will just need to provide two comparable sales as clos to January 1,2008 as possible and no later than March 31,2008. You can probably find recent sales on sites such as Zillow or Trulia. If you need a couple comps you can email me directly.
The Reavis Group Keller Williams Wilshire
Actually you can do that yourself. Please visit this site http://:www.assessor.lacounty.gov and they got the forms for you to fill out and ask for reassessment of your property to lower your property tax. Good Luck