Building to Land ratio for rental tax depreciation purposes

[burgerguy14]

I am trying to determine the above ratio to determine my depreciable basis. I've read that this can be found on the counties Property value notice. NYC does not break out building to land ratios.

I need to determine this for both my condo and a multifamily. I am not using an accountant so any insight would be helpful in tracking this ratio down.

One possibility is to use a ratio such as 80/20 Building to land.  I've read that if the IRS were to audit me, they would want my rationale for the ratio I chose.

[Mike9241]

I've read that if the IRS were to audit me, they would (s/b could) want my rationale for the ratio I chose. The same with any other ratio. Even though your tax bill doesn't break out land vs building even when they do, they may not reflect true valuations.  if you want to have some defense pay a realtor to do an analysis. others pick numbers out of the air and hope they're never audited.  others may offer other suggestions. 

here's an article from a major accounting firm on your situation.

https://www.kbkg.com/tax-insight/how-to-allocate-land-vs-building-values-for-investment-property