Keystone Realtors Ltd., which markets projects under the Rustomjee brand, has been chosen to redevelop a cluster of eight housing societies in Mumbai’s Andheri West suburb. The company said the development agreement is already signed with five societies and letters of intent have been secured from the remaining three. The project spans 4.75 acres with 548 existing residents and is expected to unlock about 10.6 lakh square feet of saleable area, yielding a gross development value of roughly ₹3,000 crore. The award comes a day after Keystone received a letter of acceptance for a separate ₹4,521-crore redevelopment in Mumbai’s GTB Nagar, its second major win this week. Investors welcomed the latest contract: the stock rose as much as 10% on 2 July, extending a nine-session rally that has added more than 25% to the company’s market value over the past month.