Unexpected charges on a 3BHK in Sector 49

₹1.1 crore for a 3BHK in Sector 49, that's what I was quoted initially. But then the builder added on so much for PLC and floor-rise premium. Matlab, 10% extra just for that? I'm based in Dubai, can't do a site inspection myself, so rely on brochures. Is this normal practice in Chandigarh? Are these charges negotiable at all? Feeling quite frustrated, seems like the total cost is never what you see first. What have others experienced with these add-ons?