That's a very complex question that depends on several factors. The largest being Katrina..... We all remember the storm after effects with prices sky rocketing. Then when the bottom fell out of the economy many people were left in homes that they paid a high price for and then it was valued as much less. So, if you purchased on the Katrina high then your home is likely still not back at what you paid for it.
Then there are the foreclosures, short sales, REO's, HUD's and such that affect the pricing of areas. If your subdivision has lots of these then your home value may be affected.
The good news is in our area - The 1-12 corridor - prices seem to be on the rise. It's slow, but it does seem to be moving up!
I'm not sure how much help I was, but if you want to send me a specific home I can run very specific comps on it and give you a good idea of the value.
Keller Williams Realty Premier Partners