Using appeal decisions as evidence in an application

An appeal decision is a material consideration. It is not a precedent, and the difference decides how much of a planning statement you can build on one. Inspectors decide the case in front of them on its own facts, and nothing in a decision letter binds a future inspector or a case officer. What the law does require is that a decision maker who departs from an earlier decision on the same issue explains why.

That distinction is the whole of the technique. Cited well, an appeal decision tells an officer how the policy test has been applied in practice. Cited badly, it reads as an attempt to fetter a discretion the officer is obliged to exercise.

Why an appeal decision is not precedent

The statutory duty runs through section 38(6) of the Planning and Compulsory Purchase Act 2004. Applications are determined in accordance with the development plan unless material considerations indicate otherwise. An inspector's earlier view is one of those material considerations, weighed alongside everything else.

Two consequences follow. An officer who reaches a different conclusion from an inspector on comparable facts is not acting unlawfully. And an inspector confronted with your favourable decision can distinguish it, disagree with it, or note that the policy position has moved since.

High Court and Court of Appeal judgments are different. Those bind on points of law, and a judgment on the interpretation of a policy is something a decision maker has to follow rather than weigh. Keep the two categories separate in your drafting, because conflating them is the fastest way to lose an officer's confidence.

The consistency principle and where it comes from

The courts have recognised that like cases should be decided alike. The leading authority is North Wiltshire District Council v Secretary of State for the Environment, decided in 1992, which held that a previous appeal decision on the same or a comparable issue is capable of being a material consideration, and that a decision maker departing from it should give reasons.

Consistency is therefore the lever, not precedent. The argument you are making is that the council would be reaching a different conclusion from an inspector on materially the same question, and that it should explain why. Put that way, it is an argument an officer can engage with rather than one they have to resist.

The force of the point rises steeply where the earlier decision concerns the same site. A previous appeal on your own land, particularly one allowed on a similar scheme, is the strongest evidence available short of an extant permission.

Which decisions carry weight

Rank them honestly before you use them. The ranking below reflects how officers and inspectors actually respond.

Age is the variable most often ignored. The National Planning Policy Framework was reissued in December 2024 and again on 17 August 2026, with policy-coded chapters replacing the older paragraph numbering, so a decision that turns on a paragraph number now needs translating into the current structure before it is quoted. Check the current edition rather than repeating the citation from the decision letter, and say which edition you are referring to. Where policy shifts under an appeal that is already running, the position gets more complicated again, as set out in when national policy changes during your appeal.

Finding decisions on the same issue

The Planning Inspectorate publishes decisions through its appeals casework search, which allows filtering by authority, procedure, decision date and outcome. That is the primary source and the one to cite.

Search technique matters more than the tool. Start with the refusal reason you expect, phrased as the inspector would phrase it, rather than with your own description of the scheme. Look at the authority's own recent appeal history, because a council that has lost three appeals on the same policy in two years will know it. And read the dismissed decisions as carefully as the allowed ones, since a dismissal that turns on a feature your scheme avoids is often more useful than an approval you cannot quite match.

Officer reports on comparable applications are worth collecting alongside the decisions. Where a council has already accepted a point in its own report, quoting that is more persuasive than quoting an inspector from another district. The evidence base behind a refusal on the loss of an employment site is a good example of how much turns on the council's own earlier position.

Distinguishing an unhelpful decision

Councils and objectors cite decisions too, and you need the other half of the skill.

1. Compare the development plan. If the local plan has been adopted or reviewed since, the policy framework has changed.
2. Compare the site. Character, constraints, designations, access and neighbouring uses are rarely identical, and inspectors say so in their reasoning.
3. Compare the evidence. A dismissal where the appellant produced no daylight modelling tells you little about a case where the modelling exists.
4. Check the Framework edition and whether the paragraph relied on survives in the current one.
5. Check whether the decision was challenged in the High Court, since a quashed decision has no value at all.

Do this work in the planning statement rather than waiting for the officer to do it. Addressing the decision that hurts you, on the record, is more convincing than hoping nobody finds it.

Citing one properly

The citation needs four elements: the appeal reference, the decision date, the site address, and the paragraph number within the decision that carries the point.

Attach the decision letter as an appendix. Officers will not chase a reference, and a quoted sentence without the letter behind it invites the suspicion that the surrounding paragraphs say something less helpful. Quote the inspector's actual words in a short extract rather than paraphrasing the conclusion, and then state in your own words what you say follows from it for this application.

The Planning Statement is where this belongs, in the policy assessment section rather than in an appendix on its own. An AI-assisted draft can structure the policy argument around a decision you supply, but the selection and the weighing are judgement calls for the author. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.

Overusing decisions and the reaction it provokes

Two or three well chosen decisions read as diligence. Twelve read as a substitute for a policy argument, and officers treat them that way.

The pattern to avoid is the appendix of decisions assembled by keyword, each given a paragraph of summary and none of them examined. It invites the officer to find the one that does not fit, and it puts the applicant in the position of arguing about other people's schemes instead of their own. Lead with the development plan, apply it to the site, and bring the appeal decision in where it answers a specific question about how a test has been applied.

This is general guidance rather than legal advice. Check the position with your local planning authority or a qualified professional before relying on it, and browse the PlanScope report types to see what else an application is likely to need.