Design Certifier and Assigned Certifier
An architect is typically the most appropriate professional to act as Design Certifier and Assigned Certifier under the Building Control (Amendment) Regulations, S.I.9 of 2014. Although your architect may also be your Assigned Certifier, there is a requirement under S.I.9 that the appointment be made under a separate agreement.
Not all developments require the services of an Assigned Certifier. Typically domestic extensions that do not require planning do not require this service. In addition domestic developments that DO require planning can OPT OUT