A Certificate of Compliance is required for all new build work and for all alterations, additions or extension work to an existing property to ensure that all works have been carried out in accordance with any Planning Permission granted and the Building Regulations. Since the introduction of the Building Control Amendment Regulations 2013, it is now part of a statutory process, which is managed on the BCMS system for all new building work over 40 sq.m.
A Certificate of Compliance is provided by an architect, surveyor or engineer, to certify that they have supervised your construction project and that it has been built in compliance with Building and Planning Regulations.
You will be asked to supply this on the sale or mortgage of your house. If you have not employed an architect, engineer or surveyor and you do not have a Certificate of Compliance, then you will have to provide an Opinion of Compliance.