Land & Improvement Ratio for depreciation

[Nuo Shi]

Hi everyone,
I just received the supplemental assessment from Santa Clara county, CA, of my purchase last year. To my surprise, the reappraised value of building decreases by 50% and land value jumps by almost 50% compared to previous value. This huge rebalance makes the final land to building improvements ratio (83% vs 17%). As depreciation is only based on improvement, I'm very limited here.

However, from the last year's appraisal report required by lender, the indicated value from a cost approach shows a land to improvement ratio (61% to 39%). Will IRS allow me to deduct base on 39% * purchase price?  From the article below, it seems no strict standard for the ratio and appraisal can be used as justification. However, this article seems years ago, I'd like to check on the forum to learn if this is out of date and hear more opinions. Thanks!

https://www.marcumllp.com/insi...