New Delhi property: The hidden cost shocker

Hidden charges on possession are a total scam, honestly. My recent experience with Vikram Properties And Builder in Sant Nagar Extension was maddening. They quoted a 3BHK around ₹1.8 Cr, but possession ke time pe itne hidden costs aa gaye, yaar. PLC, parking, maintenance deposit, random 'infrastructure development fee' — all never mentioned upfront. Matlab, it bumped total cost by almost 10-12%. I work in real estate, but even I got blindsided. Is negotiation even possible for these 'fixed' charges, or are they non-negotiable? How do you guys factor these into initial budget? Any tips to avoid surprises or get them reduced? Bahut frustrating hai yeh.