Builder ka legal track record kaise check karein?

₹1.8 Cr for a 3BHK in Sarjapur Road feels like a huge jump from my current 2BHK. Builder ka legal track record aur RERA compliance kaise confirm karein? NVT QualityLifeStyle ya Sterling Ascentia jaise projects mein, delayed possession ke time pe kya real legal options hote hain? Already home loan chal raha hai, tension ho rahi hai.