Illegal Hunters — set off 1.5' in construction

Address:

Chennai, Tamil Nadu

The plot no. 60 3rd main road, poonamalle, chennai 600056 is a layout of 30 x 60'. Flat is being promoted with setback of only 1.5' on all sides. When enquired, they state that they have an approved plan with 1.5' setback. They have refused to show the plan.

Pls let me know how to proceed

Thanks & Rgds
Niloufer