Gurugram property: The hidden cost reality

Honestly, I work in real estate, but buying my own place in Gurugram has opened my eyes to so many hidden costs. Signature Global ka ek project Behrampur Village mein dekh raha tha. Quoted price alag, phir PLC, OC charges... yeh sab kitna badha dete hain? Aur super area vs carpet area ka game kaise tackle karein? Kitna extra budget rakhoon for these hidden charges?