Can I depreciate my house turned rental at current market value?

[Andrew Underwood]

We are looking for a new primary residence, and want to turn our house into a rental. Can I depreciate our house based on current values instead of the original sales price 12 years ago? Do I need to get it appraised to prove its current value? Assuming this is an option, is there anything else I need to do to prove this for tax purposes?