Determining Home Depreciation Value from Tax Assessment

[Steve Wright]

This is the first year my prior home became a rental and I understand that depreciation is only for the value of the home.  I looked up the tax assessment and the total is less than half of what I paid when I bought it.  Can I calculate the land-to-home ratio of the assessment against my purchase price to determine the home's value?  In my case, the land is 30.36% of the overall assessed value and the home is 69.64%.  I bought the home for $135K, so the home would be $94K of that value (135,000 * .6964).  Can I use that on my taxes?