From 2BHK to 3BHK: Hidden costs I'm watching out for

Greater Noida West — researching for my 3BHK upgrade. Currently in a 2BHK, I've learned ki hidden charges possession pe bahut aate hain. Builders often spring up things like PLC, club membership, ya unexpected maintenance deposits at the last minute. Jaypee Budh Circuit Studios II jaise projects mein bhi yahi hota hai kya? Aur registry ke time jo unofficial demands hoti hain, unse kaise deal karein? Koi negotiation tips hain kya? Hope this helps others avoid surprises.