Introduction of lift in ground floor car parking

I have bought a villa in Bangalore which is G+2 floors in a gated community containing around 72 row houses. Now i wish to make a lift from open car parking in ground floor to 2nd floor. The lift opens inside the house and is of size 3ft*3ft. We are planning to cover the lift with house wall finish, ensuring not changing external facade. also with another 15 ft available we will be able to park our car in the parking without disturbing others. When contacted builder says, he cannot give permission, but if residents agree, we can go ahead. but the residents are raising objections regarding this and have stopped our work abruptly. i have this question: 1) can i go ahead and complete the construct the lift in spite of their resistance? does any law or any other fact stops me from doing that? Please note that: 1) Its a delayed project and still builder has control and no owners assosciation has been formed 2) my property is not yet registered because of arbitration issue of builder with landlord.