Rents of domestic lettings are inclusive of rates and have all along been maintained at a low level because of the provision of premium-free land and capital injections by the Government to the Housing Authority (HA). Rents are calculated on the basis of internal floor area (IFA). Apart from a few exceptions, rents per m2 IFA are uniform for all the units in the same block irrespective of floor levels and orientation. Currently, the HA's housing stock of over 200 estates provides a broad range of flat types and rent levels for different groups of tenants