A certificate issued by a local planning authority, on application, stating that an existing (LDC 191) or proposed use (LDC 192), or other forms of development, can be considered as lawful for planning purposes. This is not the same as planning permission but it is proof that your household building work is lawful. Read more about lawful developmen [..]

a procedure by which existing or proposed uses and other forms of development can be certified as lawful for planning purposes. An application has to be made to the local planning authority and there [..]