Fatima Mahal as heritage site

In the movie, when Gyanesh Shukla tells which properties Government declares heritage - like if the owners do not have the money to restore the place and the place has historical values. Also, they need the owners sign for declaring it as Heritage Property.

When Abdul Rehman got the custody, First he was in London. So Gyanesh can not force him to sign the paper as easily he could force to Mirza. Also, we can see in the end, the Haveli was restored and he has that reach in the government body that Police itself was appointed as security guard. If Gyanesh tried to declare it as heritage property, he could even fight a case in court and prove that the evidence that Gyanesh has set up (like the brick is only 20% match of heritage) is falsified and the Haveli is not a heritage property.