It's a fairly simple process to fill out the form. Due date to get your appeal in is Sept 15.
<a href="http://assessmentappeals.ocgov.com/aa/">File online</a>
<a href="http://egov.ocgov.com/portal/site/ocgov/menuitem.4981dc715fc6e27bdadd603d100000f7/?vgnextoid=529dc85ae0ba5110VgnVCM1000000100007fRCRD&vgnextfmt=default">Instructions and FAQ</a>
or pick up the forms at <a href="http://egov.ocgov.com/portal/site/ocgov/menuitem.02b739dec30413a69add603d100000f7/?vgnextoid=558c8754917f5110VgnVCM1000000100007fRCRD&vgnextchannel=529dc85ae0ba5110VgnVCM1000000100007fRCRD&vgnextfmt=default">these local libraries.</a>
The formal appeal requires appearing before a 3-member appeals board on a scheduled date. There's also the option of having a one-on-one hearing with an appeals officer. You will be required to show 3 comparable sales that closed within 3 months of Jan 1, 2008 (oct 1, 07 to mar 31, 08). They will put the most weight on sales closest to Jan 1. Also, make sure your comps are as close in specs to your home as possible. Shouldn't be too hard if you live in an Irvine tract home. That means same number of bed/bath and sq footage.
I imagine they're swamped this yr and trying to resolve as many appeals as possible before getting to formal hearing. I've gotten called twice by the appeals officer already who tried to negotiate with me.
One tip for everyone is they don't look at price per sq ft, they look at sales price. It can be somewhat of a dilemma if you have an odd property type with smaller than normal square footage. Take a 3bd/2 ba 1400 sq ft SFR with an assessed value of $600k. The nearest comps might have more common floorplans like 3bd/2ba 1800 sq ft with a $600k sales price. You would assume based on the price per sq ft the larger unit sold for, the smaller home should get assessed down. Nope, they don't look at price per sq ft!
They are either incompetent or too concerned with maintaining tax revenue as opposed to doing a fair job -- probably both. My assessment went down 8% this yr. I have a neighbor -- same tract, same neighborhood, his floorplan has 1 more bedroom -- got the full 2.5% increase. How is that explained? The whole process has made me feel very negatively of the county tax assessors. Not sure what I can or should do about it though.