In most cases, yes. Although some proposals do not require formal Planning permission the majority of projects will still require Building Regulations Approval for which detailed drawings are generally required to accompany a Building Regulations submission made to a Local Authority. This is known as a ‘Full Plans Application’ whereby the council checks the plans for Building Regulations compliance and issue an approval once happy with the technical specification of the proposal. Another method of submitting a Building Regulations Application is via a ‘Building Notice’ procedure whereby no drawings are required with only a Notice served to the Local Authority outlining the proposed works. This procedure is generally used for minor works only e.g. installation of a window.