The calculator can be used for houses, bungalows, individual purpose built and converted flats. It should not be used to calculate the rebuilding cost of a whole block of flats. The rebuilding cost of a flat should only be used where it is impossible to insure the block and where all parties are aware of the risks involved.

The figures do not apply to listed buildings or buildings with any special or unusual features. Houses in a conservation area will normally be covered by the appropriate rebuilding cost provided that there are no special features that will need to be reproduced in original materials and methods.