Your Query: Will it be helpful if I take a certificte from a Chrtered Engineer certifying that the current material value is etc etc.
The present value is no substitute for the actual cost of construction. However, in the absence of original records/accounts, you may get a Report on the Actual Cost of Construction- FinancialYear-wise, from a Registered Valuer.
Your Query: Can you prepare the papers?
I regret I will not be able to, because of logistical difficulties.