Finding and using appeal decisions on a topic
The appeals portal finds cases by reference, not by issue. Here are four techniques that work, how to read a decision letter for its reasoning, and how to cite one without overstating it.
To find planning appeal decisions on a topic you have to work round a search tool that was built to find cases by reference, not by issue. The Planning Inspectorate publishes every decision, and the portal will retrieve them by case number, by authority and by address. It will not tell you which inspectors have allowed rear dormers in conservation areas. That takes a method.
Once you have the decisions, the harder discipline is using them honestly. They are indicative of how inspectors have approached an issue, and they are not binding precedent.
Where decisions are published
The Planning Inspectorate's casework portal holds decisions for England, searchable by case reference, by local planning authority and by site address, with date filters. Every decision letter is a PDF and the reference format tells you what kind of appeal it was: the letter in the middle of the reference denotes the appeal type, with W used for section 78 planning appeals, D for householder appeals and C for enforcement appeals.
The council's own planning register is the other primary source, and on most systems the appeal decision is attached to the original application record. That matters because the register lets you search by description and by ward, which the national portal does not.
For High Court judgments on planning matters, the national archive of case law is the free source and it does support full text search. Use it when the question is one of policy interpretation rather than planning judgement.
Searching when the search is not full text
Four techniques do most of the work.
- Search the council's register by keyword and date range to build a list of application references on the issue, then look up the appeal decisions attached to them.
- Search the portal by authority with a date range, and skim the decision titles, which is tedious but effective for a small district.
- Work from the policy rather than the issue: find recent applications where the council cited the same policy, and check which were appealed.
- Use a general web search restricted to the portal's domain, because the decision PDFs are indexed even though the portal's own search does not read them.
The fourth is the one most people miss, and it is the closest thing to full text search that exists for this material.
Set a date boundary deliberately. The National Planning Policy Framework has been reissued more than once, most recently in August 2026 with policy coded chapters in place of the old paragraph numbers, so a decision that turns on the wording of a superseded edition needs reading with that in mind. A decision from before a change is still useful on facts and on approach, and weak on policy interpretation.
Reading a decision for its reasoning
Decision letters follow a standard shape. There is a formal decision, a statement of the main issues, the reasoning on each issue, other matters, conditions, and the conclusion.
Read the main issues section first. It tells you what the inspector thought the case was about, which is frequently narrower than the reasons for refusal. Then read the reasoning for the sentences that state a principle, and separate them from the sentences that describe the site.
Pay attention to what the inspector was and was not asked to decide. A decision where the council did not defend a reason for refusal, or where no objection was made on a point, says little about how that point would be treated in a contested case. Decisions on non-determination appeals are often thin on the council's position for the same reason.
Conditions are underrated. An inspector who allows an appeal subject to a carefully drafted condition is telling you what mitigation they considered necessary, and that wording is often directly transferable.
The weight an appeal decision carries
An appeal decision is a material consideration and nothing more. It does not bind another inspector or a council.
The courts have held, though, that consistency in decision making matters, and a decision maker who departs from an earlier decision on the same site, or on a closely comparable one, should explain why. So a decision is at its strongest where the site is the same, the policy is the same and the facts are close. It weakens quickly as any of those three moves.
| Situation | Weight in practice |
|---|---|
| Earlier appeal on the same site, same policy | Strong, and the decision maker should give reasons for departing |
| Appeal on a neighbouring site, same authority, recent | Useful, particularly on character and local policy interpretation |
| Appeal elsewhere on an identical policy point | Modest, and mainly for the approach rather than the outcome |
| Appeal predating a policy change | Limited on policy, still useful on method |
| Appeal where the point was not contested | Slight |
Separating the facts from the principle
The error that undermines submissions is quoting an outcome as though it were a rule. An inspector allowing a two storey extension in one street is not authority for two storey extensions.
Extract the reasoning instead. What test did the inspector apply. What evidence persuaded them. What did they say about the policy wording. Then ask whether the same test, applied to your facts, produces the same answer, and say so in those terms.
Where the decision goes against you, deal with it. A council or an objector will find it, and a submission that has anticipated the adverse decision and distinguished it on the facts is far stronger than one that pretends it does not exist.
Illustrative example: a heritage case where a nearby appeal had been dismissed for less than substantial harm not outweighed by public benefits. The submission quoted the inspector's test, set out the three factual differences in the proposal, and identified the public benefits that the earlier scheme had not offered. The earlier decision became part of the argument rather than an obstacle to it, and the Heritage Statement carried the analysis.
Citing a decision in a submission
Keep it disciplined. Give the full case reference, the date, the authority and the site, a single sentence on what the appeal was about, and the paragraph numbers you rely on. Quote sparingly and attach the decision as an appendix.
Then say what you draw from it and no more. Overstating a decision invites the officer or the inspector to read it properly and find that it says something narrower, which costs you credibility on the rest of the submission. The analysis belongs in the Planning Statement rather than in a separate note, so that the policy argument and the appeal evidence sit together.
Where the point concerns housing supply, the underlying figures matter as much as the decisions, and our note on finding housing land supply and delivery test figures explains where they live.
Keeping a topic file that stays useful
Build the file by issue, not by project. For each decision record the reference, the date, the authority, the issue in one line, the policy edition in force at the time, the outcome and the two or three paragraphs that carry the reasoning.
Review it when national policy changes. A file that is not pruned becomes a liability, because a colleague will eventually cite a decision that rested on a paragraph number which no longer exists. Following reform as it happens is easier than auditing the file afterwards, and the planning law updates timeline is one place to keep an eye on it.
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Frequently asked questions
Where are planning appeal decisions published?
The Planning Inspectorate's casework portal holds decisions for England, searchable by case reference, authority and site address with date filters. The council's own planning register usually attaches the decision to the original application record, which allows searching by description and ward. High Court judgments are on the national case law archive.
Can I search appeal decisions by keyword?
Not through the portal itself, which searches references and addresses rather than the text of decision letters. The practical workaround is a general web search restricted to the portal's domain, because the decision PDFs are indexed. Searching the council register by keyword and then looking up the resulting appeals also works well.
Are appeal decisions binding on a council?
No. An appeal decision is a material consideration and nothing more. The courts have held that consistency in decision making matters, so a decision maker departing from an earlier decision on the same or a closely comparable site should explain why. Weight falls away as the site, the policy or the facts diverge.
How do I read the appeal reference?
The reference identifies the authority and the appeal type. The letter in the middle denotes the type, with W used for section 78 planning appeals, D for householder appeals and C for enforcement appeals. Knowing the letter lets you filter a long list down to the kind of case you are researching.
Does an older decision still help after a policy change?
It helps on method and on facts, and it is weak on policy interpretation. The National Planning Policy Framework has been reissued more than once, most recently in August 2026 with policy coded chapters, so a decision resting on superseded wording should be cited for the inspector's approach rather than for the policy conclusion.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.