Exemption u/s 54

Capital gain can only be invest in residential house property so how could u take depreciation, and under which head you will take.
as per my opinion depreciation is not allowed.

there will be two situations :-

suppose if you treat it as self occupied then nav will be nil accordingly you can not take benefit of depreciation

suppose if you let out the same then you will get 30% standard deduction then no expenses including depreciation is available as deduction except as prescribed under house property like interest on loan