Using appeal decisions in a planning application
Appeal decisions are material considerations, not precedent. The useful part is almost never the outcome. It is the reasoning an inspector used to get there, and whether that reasoning transfers to your site.
An appeal decision is a material consideration in a later application, and nothing more than that. There is no binding precedent in the English planning system, so using appeal decisions well means treating them as evidence of how a policy test has been applied rather than as a rule the council has to follow. The useful material is the inspector's reasoning. The outcome, allowed or dismissed, is usually the least transferable part of the document.
Architects and agents tend to learn this the expensive way, after attaching six decisions to a covering letter and getting a refusal that does not mention any of them.
Why appeal decisions are not binding
Section 38(6) of the Planning and Compulsory Purchase Act 2004 requires determination in accordance with the development plan unless material considerations indicate otherwise. An appeal decision sits in that second category. It cannot displace the plan, and it cannot bind a different decision maker on a different site.
What the courts have recognised is narrower and more useful: a principle of consistency in decision making. Where a decision maker is faced with a materially similar case and departs from the earlier conclusion, they are expected to give reasons for doing so. That is the lever. It does not oblige the authority to agree with the inspector, but it does oblige them to engage with the point rather than ignore it.
So the argument you are actually making is never that an inspector allowed something similar. It is that a specific reasoning step, applied to facts close to yours, produced a conclusion the council has not addressed.
Finding decisions that are actually comparable
Comparability has layers, and most people stop at the first one.
| Layer | What to match | Effect on weight |
|---|---|---|
| Policy | Same development plan policy, same edition of national policy | Highest. A decision under a superseded policy shows method only |
| Authority | Same local planning authority | High for local design and character judgments |
| Context | Same designation: conservation area, Green Belt, flood zone | High where the designation drives the test |
| Physical facts | Comparable scale, separation distances, site constraints | Moderate but persuasive when specific |
| Outcome | Allowed or dismissed | Lowest. On its own it proves nothing |
A decision from a coastal district on a rear extension, allowed in 2019 under a local plan that has since been replaced, is not a comparison. A decision from your own authority in which an inspector found a 21 metre back-to-back separation acceptable in a similar suburban context, under the policy your officer is citing, is.
Search the authority's own register first. Their appeal losses are the decisions they are most sensitive about, and the officer report that preceded the refusal tells you what the internal position was before the inspector disagreed with it.
Reading for the reasoning, not the result
Decision letters follow a predictable shape, and once you know how an inspector's decision letter is structured you can go straight to the paragraphs that matter: the main issues, the findings on each, and the planning balance.
The transferable material lives in the findings. An inspector explaining why a particular roof form reads as subordinate, or why a parking shortfall did not cause demonstrable harm on a street with controlled parking, is setting out a method. That method can be applied to your site. The conclusion that the appeal was allowed cannot.
Read the whole decision before you quote from it. Inspectors qualify findings constantly, and a sentence that looks like a general proposition often has a clause two paragraphs later that limits it to the appeal site.
Distinguishing a decision that hurts you
If there is a decision against your position, the officer will find it. Better that you get there first.
Distinguishing works on facts, not on assertion. Set out what the inspector was dealing with, then set out what is different about your site, and be specific about why that difference matters to the test being applied. A scheme dismissed for harm to a listed building's setting at 12 metres separation is distinguishable at 40 metres with intervening mature planting; it is not distinguishable simply because your client's architect is better.
Where the difference is policy rather than fact, say so plainly. Local plans change, and a decision that turned on a housing land supply position that no longer holds is a decision about a situation that no longer exists.
Putting decisions in front of the case officer
Case officers are reading dozens of files. Make the reference usable.
- Name the appeal reference, the site address and the decision date in the sentence, not in a footnote.
- Quote the two or three paragraphs you are relying on, in full, rather than paraphrasing.
- State in one sentence what you say the reasoning shows.
- State what is comparable about the sites, in facts rather than adjectives.
- Attach the decision letter as a separate document so the officer can check the context.
That belongs in the Planning Statement, under the policy issue it addresses, not in a standalone appendix nobody opens. If you are running the same argument at appeal later, the same structure carries straight into a statement of case.
PlanScope can produce an AI-assisted draft planning statement that sets out the policy framework and leaves clearly marked gaps where case-specific material such as appeal references has to be inserted. The appeal analysis is yours to write, because it depends on facts only you have.
Local decisions, recovered appeals and called-in cases
Not all decisions carry the same authority. A written representations decision by an inspector on a householder appeal is a decision on the merits, and it is fine to cite, but it was reached on paper in a short timescale.
An inquiry decision, with evidence tested in cross-examination, carries more. A recovered appeal or called-in case decided by the Secretary of State carries more again on matters of policy interpretation, because the decision is the policy maker applying their own policy. Where a Secretary of State decision and an inspector's decision point different ways on the same question, say which you are relying on and why.
How much weight to claim
Claim less than you want to. Overstating weight invites the officer to reject the whole argument rather than part of it.
The phrasing that works is modest and precise: the decision is a material consideration, the reasoning at paragraph 14 is directly applicable because the policy test is the same, and no material difference has been identified between the two sites on that issue. That gives the officer something they can adopt in a report without exposing themselves.
And if the honest answer is that the decision is interesting but not close, either leave it out or say that it is offered as context. Where the point is really that the scheme should be revised rather than argued, resubmitting instead of appealing is often the faster route.
This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. Enter your postcode on PlanScope to see which reports your site needs before you start drafting.
PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Do appeal decisions set a precedent for my site?
Not in the way the word is usually meant. Planning has no doctrine of binding precedent, and every application is determined on its own merits against the development plan and other material considerations. What the courts have recognised is a principle of consistency: where a decision maker departs from an earlier decision on a comparable case, they should explain why. That is persuasive pressure, not an obligation to follow.
Where do I find appeal decisions?
Decisions are published by the Planning Inspectorate and searchable through its appeals casework service. Most local planning authorities also publish appeal decisions against their own refusals on the planning register alongside the original application. Searching the authority's register is often faster when you want local decisions, because you can filter by policy area and see the officer report that preceded the refusal.
How many decisions should I cite?
Two or three well chosen ones, used properly, beat a schedule of twelve. Each one you cite is something the officer has to read and something an objector can attack. If a decision only repeats a point you have already made from policy, leave it out. Weight comes from the closeness of the comparison, not from the number of references.
Can I rely on a decision that has been quashed or superseded?
No. Check whether the decision was challenged in the High Court and whether the policy it applied has since changed. A decision that turned on a paragraph of an earlier edition of the Framework, or on a local plan policy that has since been replaced, tells you about reasoning but not about the current policy test. Say so if you use it anyway.
Does an appeal decision help if my council refused a similar scheme last year?
It can, but only if the refusal went to appeal and the inspector addressed the same issue. An officer recommendation or a committee refusal is not an appeal decision and carries little external weight. Where the council itself lost an appeal on the point you are arguing, that is the strongest material you will find locally.
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.