If the building works carried out do not meet the standard which was applicable at the time of construction you have two choices.

 

1. Remove the illegal works [which in the case of a major dwelling alteration is not always feasible].

 

2. Carry out the remedial works to ensure compliance with the certifiers recommendations [i.e. change a window frame to an opening window for ventilation].  This is only acceptable if remedial work required is of a minor proportion.