How much weight an appeal decision carries elsewhere

An inspector's decision letter is a material consideration and nothing more. It binds nobody, it creates no precedent in the legal sense, and a case officer three miles away is entitled to reach the opposite view on similar facts. What the officer cannot do is pretend it does not exist. Where an earlier decision is directly relevant, the consistency principle requires the decision-maker to engage with it and explain any departure, and failure to do so has cost councils appeals and costs awards.

That gap, between no binding force and no freedom to ignore, is where most of the practical value sits.

Why appeal decisions are not binding precedent

Section 38(6) of the Planning and Compulsory Purchase Act 2004 requires determination in accordance with the development plan unless material considerations indicate otherwise. Section 70 of the Town and Country Planning Act 1990 requires regard to those material considerations. Neither creates a doctrine of stare decisis, because planning is an exercise of judgement on the facts of a particular site rather than the application of a rule to a set of agreed facts.

Two inspectors can look at the same policy, the same road and two schemes that differ only in fenestration, and land in different places. That is the system working as designed.

The consistency principle sits alongside this. It is well established that like cases should be decided alike, and that an earlier decision on the same or a closely comparable site is a material consideration which must be taken into account and, if departed from, addressed with reasons. The obligation is to grapple with the earlier reasoning, not to adopt it.

When an inspector will follow another decision

Weight rises with proximity, in three senses.

1. Site proximity. A decision on the same site is close to determinative on matters that have not changed. A decision on the plot next door is strong. A decision on the other side of the borough is context.
2. Policy proximity. The earlier inspector must have been applying the same adopted policies and the same national framework. The Framework was re-issued in December 2024 and again on 17 August 2026, and the August 2026 edition is organised by policy code rather than paragraph number. A decision turning on old paragraph numbering needs translating before you rely on it.
3. Issue proximity. A decision that turned on highway safety helps very little on a heritage case, even on the same street.

Where all three line up, the earlier decision does real work. Where only one does, you are offering the officer background reading.

Age is a weaker signal than practitioners assume. A 2019 decision applying policies that remain adopted, on the same site, with the same constraints, still carries weight. A decision from last year on a scheme assessed against a local plan that has since been replaced carries very little. Check the plan's adoption date before you check the decision date.

Finding the decisions worth citing

The Planning Inspectorate's appeals casework service holds decision letters and lets you filter by local planning authority, procedure and date. Searching by authority and by appeal type, then reading titles, is slow and reliable. Searching by keyword alone tends to surface long inquiry decisions that are hard to compare.

A few habits make the search shorter:

• Start with the council's own register. Refusals that went to appeal carry the decision letter against the original reference, so you can read the officer report and the inspector's answer together.
• Note the procedure. Written representations decisions are shorter and more formulaic; hearing and inquiry decisions carry fuller reasoning and are more useful on contested policy questions.
• Record the appeal reference, the date and the paragraph numbers you want, alongside the link.

Costs decisions repay a separate search. Where a council was ordered to pay costs for failing to substantiate a reason for refusal, the costs decision tells you what evidence the Inspectorate expects behind that kind of reason, and that is useful long before any appeal is contemplated.

Distinguishing an unhelpful decision

Sooner or later the council produces a decision that goes against you. The response is to distinguish it on the facts, and there are usually more grounds available than people expect.

Look first at what the inspector actually decided. Decision letters often dismiss an appeal on one main issue and expressly find in the appellant's favour on the others, and those favourable findings are quotable even though the appeal failed. Then check the policy base: a superseded local plan, an out-of-date housing land supply position, or an earlier edition of the Framework all reduce weight.

Then look at the scheme. Height, separation distances, the presence of a boundary treatment, whether the site was in a conservation area, whether there was an ecology objection. And check whether the inspector recorded any agreed position between the parties, because a matter conceded by a previous appellant is not a finding on the merits at all.

Presenting decisions in a statement

Attach the decision letter. Do not summarise it and hope. Officers and inspectors read the primary document, and a paraphrase that stretches the reasoning damages your credibility on everything else in the submission.

In the body of the Planning Statement, give the appeal reference, the date, one sentence of site description and then the quoted passage with its paragraph number. Follow it with a short paragraph explaining why the situations are comparable, addressing the obvious differences yourself. Two well-chosen decisions beat eight.

Where a decision is central, raise it before determination rather than saving it for the appeal. Councils that refuse without engaging with a relevant decision expose themselves to an application for costs, and case officers know it.

Illustrative example: a first-floor side extension is refused on separation distances, and an appeal two streets away allowed a comparable extension on a similar 1930s semi under the same adopted policy. Citing that decision, with the inspector's paragraph on the 21-metre guideline and a plan showing the two relationships side by side, puts the council to a choice between explaining the difference and granting.

High Court judgments compared

Judgments of the High Court, Court of Appeal and Supreme Court are a different animal. They bind on points of law: how a policy must be interpreted, what a decision-maker must take into account, whether reasons were adequate. They rarely decide whether a scheme is acceptable, because that is a matter of planning judgement for the decision-maker.

So use judgments for interpretation and inspectors' decisions for application. Citing a judgment for a proposition about the planning merits is a common error and invites a correction that undermines the rest of the case. Judgments are published on the National Archives Find Case Law service with neutral citations, and those citations are what you quote.

Planning law changes faster than most evidence bases, and it is worth checking the planning law timeline for reforms that may have moved the policy under a decision you were relying on. Where the appeal decision predates a change to the Framework, say so in your own statement before the council does.

For the drafting itself, PlanScope's report library covers the supporting documents that usually accompany a resubmission, and drafts are structured to UK planning policy with sources cited. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.

This is general guidance, not legal advice; check the position with a qualified professional before relying on it.