Deviation in construction

First get entire facts from concerned Corporation seeking information under RTI for

1)Actual plan approval, copy of conditions laid down for construction,

2)Copy of the inspection report if any from TPO.

3)The record if any with BMC about actual measurements or deviations or violations noticed 

4.) Copy of the circular that states  action as laid down in their directives/circulars/notifications for deviations and violations

5)Steps taken so far, against builder/owner if violations/deviations are on record.

(You may search website to know the concerned SPIO, Rules and regulations of RTI Applicable to them)

How are you related to this issue?, if you are not concerned to this why do you want to raise this issue? are you affected by this?, if it is in the general interest of public, you know what is to be done to this, better approach the competent authorities who granted permission to such structures seek information through RTI, find out the irregularities and write to the authorities about the irregularities and ask them to initiate appropriate action.