Keystone Realtors Ltd has acquired development rights worth ₹143.45 crore from Parth Construction to strengthen its residential project in Versova, Andheri West, Mumbai. The deal involves 8,800.74 sq. metres of FSI from an SRA project in Jogeshwari East, along with parking spaces. Officials said such FSI transfers are increasingly used to maximise development in high-demand city markets.