Builders' super area games are daylight robbery

Was supposed to decide by last month but builders ka super area vs carpet area game dimag kharab kar raha hai. I work in real estate, par khud ke liye buy karte time bhi yeh log lootne ki koshish karte hain. Networth Realty Sector 95 mein 3BHK dikha raha tha ₹1.1 Cr mein. Brochure mein 1800 sqft super area, but carpet area hardly 1200 nikla. Possession pe phir bolenge maintenance super area pe hai. Yeh hidden charges kitne add hote hain? Koi batao kitna expect karoon final bill mein?