Appeal timetables and what actually drives delay
Appeal delay usually comes from a rejected submission, an escalating procedure or late evidence. Here is the programme stage by stage, and where the time actually goes.
Planning appeal timescales are driven far more by procedure and paperwork than by the merits of the case. An appeal against refusal under section 78 of the Town and Country Planning Act 1990 runs to a published programme, and most of the slippage a developer experiences comes from three places: a rejected appeal submission, a procedure that escalates from written representations to an inquiry, and evidence arriving late. The Planning Inspectorate publishes its performance statistics on gov.uk, so check the current averages for your procedure rather than working from a figure someone quoted on a previous scheme.
The deadlines that bind you, not the Inspectorate
The first clock is the deadline to lodge. Miss it and there is no appeal, whatever the strength of the case.
For most refusals of full or outline permission the window is six months from the date on the decision notice. Householder appeals and certain minor commercial appeals run on a much shorter fuse of 12 weeks. Advertisement consent appeals have their own period, and an enforcement notice appeal has to be lodged before the notice takes effect, which can be a matter of weeks. Those are hard deadlines rather than targets.
Six months sounds generous until you try to use it. If you spend five of those months redesigning, taking advice and deciding whether to appeal at all, you will lodge a rushed submission. Better to read the reasons for refusal properly in the first fortnight, decide, and then use the remaining time on evidence.
Why appeals get rejected before they start
An appeal that is not valid does not have a start date, and without a start date nothing else runs. Rejection at this stage is the single most avoidable cause of delay.
The usual reasons are mechanical. Missing or incorrect ownership certificates. Plans that differ from those the council determined. An appeal form that does not identify the decision being appealed. No copy of the decision notice. A full statement of case absent where the chosen procedure requires one at submission. In enforcement appeals, grounds that are not properly identified.
The fix is a pre-submission check by someone who has not prepared the appeal. Give them the council's decision notice, the application drawing register and your appeal bundle, and ask them to match one against the other. Twenty minutes of that work is worth more than any amount of drafting polish.
The written representations timetable
Most appeals proceed by written representations, and the timetable is short and largely fixed once the start date is issued.
| Stage | Typical position in the programme |
|---|---|
| Start date issued | Follows validation of the appeal |
| Council questionnaire and supporting documents | Within a few weeks of the start date |
| Appellant and council statements | Exchanged on a set date after the start |
| Interested party representations | Due on the same deadline as statements |
| Final comments | A short window after the exchange |
| Site visit | Arranged once the paperwork is closed |
| Decision | Issued after the visit |
The appeal questionnaire and the council's statement arrive early, and they tell you what the authority is actually defending. That is often narrower than the reasons for refusal suggested. Read them the day they land, because the window for your own statement is not long enough to absorb a surprise.
Representations from neighbours and consultees are recirculated at the same point. Interested party representations at appeal carry real weight on amenity grounds, and the final comments stage is your only chance to answer them.
Hearings and inquiries add a case management layer
A hearing or an inquiry brings in listing, which is where programme risk concentrates. The Inspectorate has to find an inspector, a venue and a slot that suits the parties, and that is not a one-week exercise.
Inquiries now run on an actively managed model following the independent review of planning appeal inquiries published in 2018. In practice that means an early case management conference, a statement of common ground agreed between the parties, and firm dates for proofs of evidence, which under the inquiry procedure rules are due four weeks before the inquiry opens. Proofs of evidence and rebuttals are the deliverable that most often slips, and a late proof can move the inquiry rather than just embarrass the witness.
The corollary is that inquiry appeals reward preparation done before the appeal is lodged. If your expert witnesses are not appointed when you submit, the timetable will find you out.
The site visit and the decision
Site visits are unaccompanied where the inspector can see everything relevant from public land, and accompanied where access to the site or a neighbour's property is needed. Accompanied visits take longer to arrange because three diaries have to meet.
One practical point that costs schemes weeks. If the appeal turns on the outlook from a neighbouring window or on the effect of a tree canopy, say so in your statement and request an accompanied visit with reasons. Discovering at the visit that the inspector cannot see the thing your case depends on is a poor outcome, and asking afterwards rarely helps.
Decision drafting then takes as long as it takes. But there is no statutory deadline for the inspector's decision, which is the part of the programme you have least influence over.
Where appellants create their own delay
Read any set of appeal papers and the same self-inflicted items recur.
Submitting a unilateral undertaking or a signed section 106 agreement at the last moment, when it needed the council's engagement weeks earlier. Introducing amended plans mid-appeal, which the inspector may decline to accept. Asking to change procedure after the start date. Commissioning a survey after the appeal is lodged, so that the evidence arrives after the statement deadline and cannot be admitted. Appealing before the survey season allows the ecology or noise work to be done at all.
There is a related strategic error, which is appealing when a fresh application would be faster. A non-determination appeal has its own logic and is sometimes the right move, but appealing a refusal you could have answered with a modest redesign usually buys delay rather than permission.
Programming around what you cannot control
Build the programme backwards from the fixed points rather than forwards from today.
- Fix the lodging deadline from the decision notice and work back six weeks for internal sign-off.
- Decide the procedure you will request, and appoint witnesses before submission if it is a hearing or an inquiry.
- Identify any seasonal survey your case needs and check the window against the appeal timetable before you lodge.
- Draft the statement of case in full at submission stage, even where the procedure allows it later.
- Settle any planning obligation with the council in parallel with the appeal, not after the statements.
- Treat the final comments stage as a drafting task with a named owner, not an afterthought.
Where the refusal turned on policy interpretation rather than evidence, the quality of the Planning Statement you put in at appeal does more work than anything else in the bundle. Drafting it early, and having a planner review it before submission, is the best programme insurance you can buy.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
How long do I have to lodge a planning appeal?
For most refusals of full or outline permission the deadline is six months from the date on the decision notice. Householder appeals and certain minor commercial appeals allow only 12 weeks. Enforcement notice appeals must be lodged before the notice takes effect. These are hard deadlines, and a late appeal cannot be accepted.
Why was my appeal rejected as invalid?
Almost always for mechanical reasons rather than the merits. Missing or incorrect ownership certificates, plans that differ from those the council determined, no copy of the decision notice, an unclear identification of the decision appealed, or a statement of case missing where the chosen procedure requires one at submission.
Who decides whether my appeal is a written representations case or an inquiry?
The Planning Inspectorate determines the procedure against published criteria, taking account of the complexity of the issues, whether evidence needs testing by cross-examination and the level of public interest. You can request a procedure and give reasons on the appeal form, but the decision is not yours.
When are proofs of evidence due for an inquiry?
Under the inquiry procedure rules proofs are due four weeks before the inquiry opens, alongside summaries where a proof is long. Inquiries also run on an actively managed model with a case management conference and an agreed statement of common ground, so several deliverables fall before the proof deadline.
Can I submit amended plans during an appeal?
Only with the inspector's agreement, and it is often refused. The appeal is against the scheme the council determined, so material changes risk prejudicing interested parties who commented on the original. If your proposal needs amending, a fresh application is usually a faster route than trying to change it at appeal.
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.