Atlanta Limited: True cost beyond the quote?

Honestly, I'm fed up of renting in Delhi, landlords keep increasing rent. Finally taking the plunge for a property near Gulmohar Park. Dekh raha hoon Atlanta Limited ke projects. Builder quote toh de diya but I need to figure out the *true* all-in cost. What hidden charges usually pop up after the initial price, stamp duty, and registration? Kya koi extra PLC, parking, ya club membership fees bhi hoti hai jo end mein pata chalti hai? As an investor, total acquisition cost should be clear.