Guide
A planning supporting statement is one of the most important documents in a planning application — but it is also one of the most misunderstood. Many applicants either skip it entirely or produce a vague document that fails to engage with the relevant planning policies.
This guide covers everything you need to know: what a supporting statement must contain, how to structure it, which NPPF paragraphs to cite, and how to write the assessment section that actually wins applications.
A planning supporting statement (sometimes called a planning statement or a supporting planning statement) is a document that accompanies a planning application and sets out the policy case for why the proposed development should be approved.
It is not a description of what you want to build — that is what the plans and drawings are for. A supporting statement explains why what you want to build is acceptable in planning policy terms.
The legal test for planning decisions is set out in Section 38(6) of the Planning and Compulsory Purchase Act 2004: applications must be determined in accordance with the development plan unless material considerations indicate otherwise. Your supporting statement is your opportunity to demonstrate that the development accords with the development plan.
Most planning supporting statements follow a standard six-section structure. This structure mirrors the way planning officers assess applications and makes their job easier — which works in your favour.
Briefly introduce the application site, the applicant, and the nature of the proposed development. Identify the local planning authority. State the purpose of the statement. Reference the application drawings by drawing number. If there is relevant planning history on the site, mention it here.
Keep this section concise — one to three paragraphs is sufficient.
Describe the physical context of the application site: its location, size, existing use, character, and any relevant designations (conservation area, flood zone, AONB, etc.). Describe the surrounding area and the character of neighbouring development.
This section matters because it establishes the baseline against which the proposal will be assessed. A planning officer reading this section should be able to visualise the site and understand its context before looking at the plans.
Describe what is being proposed clearly and specifically. Include key dimensions, materials, uses, and the nature of the works. For extensions, state depths, widths, heights, and roof forms. For change of use, identify the existing and proposed use classes.
This section should be factual and precise. Avoid vague language — "a modest extension" tells the planning officer nothing; "a single-storey rear extension measuring 4.0m in depth with a flat roof at 3.0m" does.
This is where you set out the planning policies relevant to your application. A well-constructed policy framework section typically covers three tiers:
Do not list every policy in the local plan. Identify the ones that directly relate to your proposal and cite them accurately by policy reference number and title.
This is the most important section. For each policy you have cited, demonstrate specifically how the proposal complies with it. Use sub-headings to organise the assessment by topic — design and character, neighbouring amenity, heritage impact, highway impact, etc.
The assessment must be specific to your proposal. Generic statements that could apply to any application carry no weight. Reference the actual measurements, materials, and site characteristics from Section 3 when demonstrating compliance.
Summarise the policy case. Confirm that the proposal accords with the development plan taken as a whole and with the NPPF. Conclude that planning permission should be granted. Reference the paragraph 11 presumption in favour of sustainable development if appropriate.
The National Planning Policy Framework 2023 is the primary national planning policy document in England. The paragraphs most commonly relevant to householder and small-scale applications are:
Always check that the paragraph number you are citing matches the 2023 version of the NPPF. Paragraph numbers changed when the NPPF was updated in December 2023.
The amenity assessment is the part of Section 5 that addresses the impact of the proposal on neighbouring properties. For householder applications, this is often the most contentious aspect of the application — and the one most likely to attract objections.
A thorough amenity assessment should address four issues for each neighbouring property that could be affected:
Address each neighbouring property individually. "There will be no impact on neighbouring amenity" is not an assessment — it is an assertion. Show your working.
Writing a thorough planning supporting statement for a straightforward householder application typically takes an experienced professional two to three hours. For a complex application involving heritage assets or contentious policy issues, it can take a full day or more.
For architects, developers, and planning consultants who produce multiple applications, that time adds up quickly.
Planabl generates a policy-referenced first draft — ready to download as an editable Word document, review, and submit under your name.
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