Documents to calculate rental property depreciation?

[Kim Livingstone]

I know that depreciation deductions are spread out over the “useful life” of a property. The IRS allows an owner to depreciate the value of the home over a 27.5 year period. Depreciation is calculated with this formula below:

Cost of the Building- Value of the Land = Building Value

Building Value / 27.5 = Yearly allowable depreciation deduction

My questions are:

What or which documents will provide me the

1. cost of the building

2. the value of the land

so I can calculate the formula?

Where do I find these documents?

Thank you in advance for your replies.