Keystone Realtors Limited is an India-based real estate developer company, which operates under the brand Rustomjee. The Company is primarily engaged in the business of real estate construction, development, and other related activities. It provides various residential buildings, premium gated estates, townships, corporate parks, retail spaces, landmarks, schools, clubhouses, parks within townships, and various other real estate projects. It offers one bedroom, hall, and kitchen (BHK), two BHK, three BHK, four BHK, and five BHK. The Company has approximately 37 completed projects, 16 ongoing projects, and 28 forthcoming projects across the Mumbai Metropolitan Region (MMR). Its properties include Rustomjee Uptown Urbania, Rustomjee Bella, Rustomjee Elements, Rustomjee Global City, Rustomjee Erika, Rustomjee Paramount, Rustomjee Crown, Rustomjee Seasons, La Vie at Rustomjee Uptown Urbania, Rustomjee Parishram, Rustomjee Oriana, and Rustomjee Summit.