South Extension I flat: My 'final' cost wasn't final

₹2.8 Cr for my 3BHK in South Extension I – that's what Housing Reality Group quoted initially. But honestly, after getting possession of my flat a couple of months back, the 'all-in' cost was way higher. Things like PLC, parking, and a whole year's maintenance advance just popped up. My EMI started last month, and I'm realizing the true burden. Nobody told me about these hidden charges properly beforehand. Matlab, registration and stamp duty toh pata tha, but these other things added almost 12-15% more to the base price. I tried negotiating hard, but builder bola 'no-price-drop policy'. Is this normal for South Delhi projects? Did anyone manage to get good spot discounts or negotiate effectively on a new property here? What hidden costs did you face after booking? I'm just wondering if my experience was standard ya I missed something big.