Searching appeal decisions for a planning argument

Searching planning appeal decisions is a research skill rather than a lookup, and the difference shows in what you get back. The Planning Inspectorate publishes every decision it issues, which means the argument you are about to make in a committee report or a statement of case has probably been tested somewhere in England already. Finding it takes a structured search, and using it takes an honest assessment of how comparable the two cases really are.

The failure mode is quoting a decision that helps you, without checking whether the policy it applied still exists.

Where decisions are published and how to search

All appeal decisions are published through the Planning Inspectorate's casework portal, reached from its pages on gov.uk. You can search by appeal reference, by local planning authority, by decision date, and by keyword within the decision text.

Learn the reference format because it saves time. References begin with APP, then a code for the local planning authority, then a letter identifying the appeal type, then the year and a case number. The letter is the useful part: W covers most section 78 planning appeals, D covers householder appeals, and C covers enforcement appeals.

Two practical habits. Search on the statutory or technical term rather than the everyday one, so vertical sky component rather than loss of light, or very special circumstances rather than green belt exception. And search for the policy reference as a string, because inspectors quote policy numbers verbatim and that gives you decisions turning on the same policy rather than the same subject.

Filtering by procedure, date and subject

Procedure tells you how much reasoning to expect. Written representations decisions are short and deal with a narrow set of main issues. Hearing decisions are longer. Inquiry decisions run to many pages, deal with expert evidence, and are where you find reasoning detailed enough to cite on a technical point.

For a methodological argument, filter to inquiries. For a straightforward amenity or design point, written representations decisions are more numerous and closer to the kind of scheme in front of you.

Date filtering matters more than people assume, and policy change is only part of the reason. The national policy framework has been reissued several times, with paragraph numbering changed in December 2024 and the structure changed again in August 2026. A decision applying superseded numbering is not worthless, but you have to translate it, and you should say so when you cite it.

Reading a decision letter for the reasoning

Decisions follow a consistent structure, and reading them in order wastes time. Go to the main issues paragraph first, usually near the start, because it tells you what the inspector decided the case was about. If the main issues do not match your case, stop reading.

Then read the reasoning on the issue you care about, and specifically the sentences where the inspector states a conclusion and gives a reason for it. Those are the sentences worth quoting. Descriptive passages and recitations of policy are not.

Three things to note as you go. Whether the inspector accepted or rejected the appellant's technical evidence, and why. Whether any conditions were imposed that are relevant to your case, because the conditions schedule is often more useful than the reasoning. And whether a costs application was made, which is dealt with in a separate decision.

Check the site description carefully for comparability. A decision about a two storey rear extension in a dense terrace tells you little about the same extension on a suburban plot with 20 m gardens, and an officer or an inspector will say so.

Weight: indicative rather than binding

Appeal decisions are not binding precedent. They are material considerations, and the weight given to one is a matter for the decision maker.

There is a real principle behind consistency. The courts have held that a previous appeal decision on the same site, or on a closely comparable one, is capable of being a material consideration, and that a decision maker departing from it should explain why. That is a duty to give reasons, not a duty to follow.

So the useful framing in a submission is never that a decision requires a particular outcome. It is that an inspector, applying materially similar policy to materially similar facts, reached a conclusion, and that consistency points the same way here unless there is a reason to distinguish it.

Be the one who identifies the differences. A submission that presents a decision as on all fours, when it plainly is not, loses credibility on everything else in the document.

Using a decision in a committee submission

Keep it short and make it verifiable.

1. Give the full appeal reference and the decision date.
2. Attach the decision, or provide a link to it in a covering schedule rather than in the body of a Planning Statement.
3. Quote no more than two or three sentences, with the paragraph number.
4. Set out in one short paragraph why the case is comparable: same policy, same designation, similar scale, similar constraint.
5. Set out the differences and why they do not change the point.

Where the argument depends on a designation, check the designation position for both sites rather than assuming from the description. The national datasets make this quick, and our notes on finding conservation area boundaries and using MAGIC to check designations around a site cover the sources.

Heritage cases need particular care, because the harm judgement in one case rarely transfers to another. A Heritage Statement citing an appeal decision has to engage with the significance of both assets rather than treating the conclusion as portable.

Costs decisions and what they show

Costs decisions are issued separately and are worth reading for a different reason. They show what inspectors have treated as unreasonable behaviour: refusing against officer advice without evidence, failing to substantiate a reason for refusal, introducing new grounds late, or withdrawing a reason for refusal at the last moment.

For a consultant, that is useful in two directions. It tells you when an authority's position is exposed, which is a negotiating point before an appeal is lodged. And it tells you what your own client must not do, because costs are awarded against appellants as well.

Read them as illustrations of how the guidance has been applied rather than as a tariff. Each turns on its own facts.

Keeping a searchable record for a practice

The value compounds if you keep what you find. A simple table, maintained by everyone in the team, is enough: appeal reference, date, authority, topic, the policy or standard at issue, the outcome, and the paragraph number of the sentence that mattered.

Add one field that most practices leave out: whether the decision has been challenged. Decisions are occasionally quashed, and a quashed decision cited in a statement of case is an avoidable embarrassment. Note the check date.

Also record the policy edition the inspector was applying. In three years that field is the one that tells you whether the decision is still usable, and reconstructing it later is tedious.

One honest limitation. The published record is enormous and the search tools are better at references than at concepts, so a search that returns nothing usually means your search terms were wrong rather than that no decision exists. Try the technical term, the policy number and the name of the standard before concluding there is nothing there.

Browse the 66 report types to see where appeal evidence tends to be most useful in a supporting document.

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