law: Delhi Rent Control Act, 1958 
  23. Permission to construct additional structures.
  
  -
  Where the landlord proposes to make any
  
  improvement in, or construct any additional structure on, any building which
  
  has been let to a tenant and the tenant refuses to allow the landlord to make
  
  such improvement or construct such additional structure and the Controller, on
  
  an application made to him in this behalf by the landlord, is satisfied that
  
  the landlord is ready and willing to commence the work and that such work will
  
  not cause any undue hardship to the tenant, the Controller may permit the
  
  landlord to do such work and may make such other order as he thinks fit in the
  
  circumstances of the case.