Are Architectural Drawings Needed for Planning Permission?

Yes. UK local planning authorities require a defined drawing pack with almost every planning application. Without the correct drawings, the local authority will validate the application as incomplete and return it without registering it, which delays the clock starting on the determination period.

The minimum drawing set for a householder application includes a location plan at 1:1,250 or 1:2,500 based on an Ordnance Survey base, showing the site in relation to surrounding streets. A block plan at 1:500 shows the site boundary and the footprint of existing and proposed buildings. Existing and proposed floor plans drawn to scale with a metric scale bar show internal arrangement and dimensions. Existing and proposed elevations, also to metric scale, show the external appearance of the building from each principal aspect affected by the proposal. A site plan shows hard and soft landscaping, access, parking, and boundary treatments.

Larger or more sensitive schemes require additional documents. A Design and Access Statement is mandatory for major applications, for development in designated areas, and for listed building applications. It explains the design rationale, how the proposal relates to its context, and how access requirements have been addressed. A Heritage Impact Assessment is required where a proposal affects a listed building or its setting. Transport assessments, ecological surveys, noise assessments, and flood risk assessments are required on a site-specific basis.

All drawings must be to metric scale and must include a north point, a scale bar, the drawing number, the revision number, and the date. The Planning Portal, through which most English applications are now submitted, specifies maximum file sizes and preferred formats. PDF is the standard format; most councils will not accept hand-drawn submissions unless they meet the same legibility and scale requirements.

CGI and verified views are not mandatory drawing types, but they are increasingly submitted alongside formal drawings to illustrate how the proposal will appear in its context. For major applications, tall buildings, or development in sensitive conservation areas, the planning officer may request CGI as part of the validation requirements or as a condition of pre-application discussions. CGI submitted with the application strengthens the visual case, reduces officer queries, and can support a more straightforward determination.