Guide
When is a Transport Statement required for planning?
Updated
There is no single national threshold. The requirement comes from your local planning authority, and the honest answer to "do I need one?" is a short check against that authority's own documents, done before any consultant is appointed.
Where the requirement comes from
- National guidance: the government's planning practice guidance on travel plans, transport assessments and statements (gov.uk) says applications that would generate significant movement should be supported by these documents, and leaves thresholds to local judgement.
- Local validation checklists: many authorities publish lists of what must accompany an application, sometimes with size or use-class triggers for a TS or TA.
- Local plan policies and the highway authority: policy wording and highway officers' practice fill the gaps where no explicit threshold is published.
- Pre-application advice: the most reliable confirmation, in writing; highway authority pre-app advice may carry its own fee, so check the authority's schedule.
Signals a Transport Statement is likely
In practice, authorities tend to ask for at least a Transport Statement where a scheme changes how a site is accessed or meaningfully changes trips: new accesses onto classified roads, intensification of use, schemes near congested junctions, or parking below or above local standards. Smaller householder applications rarely need one; larger schemes graduate to a full Transport Assessment. These are patterns of common practice, not rules, and the authority's word beats any generalisation, including this one.
The cheap way to confirm
- Read the authority's validation checklist for your application type; if it names a threshold, you have your answer.
- If not, ask the case officer or use pre-app advice, and get the ask in writing, TS, TA, Travel Plan, or none.
- Quote consultants for exactly that ask. A named scope gets you fixed, comparable fees; see what each document costs.