Gurugram property's hidden charges are a scam

My kids are growing up fast, so we need a bigger 3BHK now. Looking at Sector 89A, maybe Orris projects. Base price toh dikh jaata hai, but what about the actual all-in cost? Like, stamp duty, registration, PLC, parking, and hidden charges jo possession pe aate hain? Is it really a big chunk? Kya builders se negotiate kar sakte hain in pe?