7 Steps to Appeal a Planning Permission Decision
Last Updated: October 24, 2026
Quick Summary
To appeal planning permission, submit your appeal to the Planning Inspectorate within 6 months of the decision notice date for most applications. Your appeal statement must address each reason for refusal with supporting evidence, and the inspector will decide whether to grant permission, dismiss your appeal, or grant permission with modified conditions.
The standard appeal deadline is 6 months from the decision notice date for householder and minor commercial applications.
You can appeal a refusal of planning permission, approval with unreasonable conditions, or non-determination if no decision was made within 13 weeks.
The appeal process typically takes 6 to 9 months from submission to decision through written representations.
Most appeals are decided on documents alone; the inspector may assign a hearing or public inquiry instead.
Your appeal statement must acknowledge the authority's refusal reasons and address each one with evidence and reasoned argument.
Table of Contents
Who Can Appeal a Planning Permission Decision
Which Planning Decisions You Can Appeal
Understanding the Planning Appeal Process
Planning Appeal Deadlines and Time Limits
Preparing Your Planning Appeal Statement
Gathering and Submitting Planning Appeal Evidence
What Happens After You Submit Your Appeal
Getting Professional Support for Your Appeal
Frequently Asked Questions
Who Can Appeal a Planning Permission Decision
Anyone with a direct interest in a planning decision can appeal planning permission, the applicant who submitted the original planning application, or a third party with a legitimate interest in the outcome.
If you're the applicant and your planning permission was refused, you have the right to appeal, as you do if conditions were attached that you believe are unreasonable or impossible to meet.
Third parties, typically neighbours or local community groups, can appeal against a decision to grant planning permission. They cannot appeal a refusal.
Who qualifies as a third party? Anyone living or working nearby, or anyone with a demonstrable interest in the land or development. You don't need to own property adjacent to the site. Planning Inspectorate guidance on who can appeal clarifies the eligibility rules in detail.
Which Planning Decisions You Can Appeal
Not every planning decision can be challenged through the appeal process. Knowing which ones can be appealed saves time and money.
You can appeal a refusal of planning permission, the most common route, or an approval with conditions you believe are unreasonable, impossible to comply with, or too costly to implement.
Non-determination appeals are possible when the local planning authority fails to make a decision within the statutory timeframe.
What you cannot appeal:
Decisions made by the Planning Inspectorate on a previous appeal (these require judicial review, a different legal process)
Informal advice from the planning authority
Decisions about listed building consent or conservation area consent (these have separate appeal routes)
Understanding the Planning Appeal Process
The planning appeal process follows clear stages. Knowing what happens at each step helps you prepare stronger evidence and manage your timeline.
Your appeal goes to the Planning Inspectorate, independent of the local authority that made the original decision.
The appeal has three possible outcomes: the inspector upholds your appeal and grants permission, dismisses your appeal and upholds the original refusal, or grants permission with modified conditions. Most appeals result in dismissal, but success rates vary by application type and local area.
The process typically takes 6 to 9 months from submission to decision; complex cases or public inquiries take longer. During this time you submit your appeal statement and evidence, the local authority responds, and third parties may make representations.
Planning Appeal Deadlines and Time Limits
Deadlines are strict: the Planning Inspectorate will reject a late appeal without considering its merits.
The deadline depends on the application and appeal type. In England, the standard limit for most appeals against a refusal of planning permission or against conditions is 6 months from the date on the decision notice, the typical deadline for an appeal planning permission covering householder, minor commercial and most other local authority applications. For non-determination appeals, the 6-month clock starts when the statutory decision period expired, not when you applied.
There are exceptions you must check before you rely on any figure:
Householder and minor commercial appeals: 6 months from the decision notice.
Advertisement consent appeals: 6 months from the decision notice.
Listed building consent and conservation area consent appeals: these follow a separate route and separate deadlines, do not assume the planning permission timetable applies.
Enforcement notice appeals: much shorter, commonly 28 days from the date the notice takes effect. This is a different appeal type and a different form.
Do not count from the date you received the decision notice. Count from the date printed on it. If the notice was posted, the date on the letter is still the date that matters. If you are unsure, ring the Planning Inspectorate's customer service line before you do anything else.
A practical deadline checklist:
Find the decision notice and read the date at the top.
Identify the application type (householder, minor commercial, full, outline, advertisement, listed building, enforcement).
Match the application type to the correct appeal deadline, do not assume 6 months applies across the board.
If the appeal is against non-determination, calculate the date the decision period expired and count 6 months from there.
Diarise the deadline and work backwards at least 6 weeks for evidence gathering and statement drafting.
Submit through the Planning Inspectorate's online appeals service before 23:59 on the deadline date, postal appeals are treated as submitted on the date received, not posted.
What happens if you miss the deadline: the Inspectorate has no general discretion to accept a late appeal.
Planning Inspectorate appeals guidance sets out the current deadline for each appeal type and is the only source you should treat as definitive.
Appeal deadlines vary by application type and are strictly enforced by the Planning Inspectorate.
Appeal Type | Deadline | Notes |
Householder appeal | 6 months from decision notice | Standard route for most householder applications |
Minor commercial appeal | 6 months from decision notice | Standard route for minor commercial applications |
Advertisement consent appeal | 6 months from decision notice | Separate from planning permission appeals |
Enforcement notice appeal | 28 days from notice takes effect | Much shorter deadline than other appeal types |
Non-determination appeal | 6 months from decision period expiry | Clock starts when statutory period expired, not application date |
Listed building or conservation area consent | Separate route and deadlines | Do not assume planning permission timetable applies |
Preparing Your Planning Appeal Statement
Your appeal statement is the core of your case. It's your opportunity to explain why the local authority's decision was wrong and why permission should be granted.
Acknowledge the authority's reasons for refusal and address each one directly. How to Apply for Planning Permission Online covers the foundational planning process, which helps you understand what went wrong with your original application and how to correct it in your appeal.
Structure your statement clearly:
Executive summary (one page maximum)
Detailed response to each refusal reason
Explanation of planning policy and how your proposal aligns
Description of the site and its context
Explanation of the development and its benefits
Keep your language professional and objective, inspectors respond to evidence and reasoned argument, not frustration or personal attacks on the planning officer's decision.
How to Apply for Planning Permission Online covers the foundational planning process, which helps you understand what went wrong with your original application and how to correct it in your appeal.
Gathering and Submitting Planning Appeal Evidence
Evidence makes your appeal credible: weak evidence leads to dismissal, strong evidence significantly improves your chances.
Collect documents addressing each reason for refusal. For policy conflicts, provide the relevant policy documents and expert analysis showing compliance.
Types of evidence that carry weight:
Professional reports (structural, ecological, highways, daylight/sunlight)
Photographs and site plans showing context
Letters of support from neighbours or local organisations
Precedent examples of similar developments approved elsewhere
Expert testimony addressing specific concerns
Submit everything as a single package to the Planning Inspectorate, appeal form, appeal statement and all supporting documents, organised with a contents list so the inspector can navigate easily.
The local planning authority will submit their own response, usually within 2 weeks. They'll explain their reasons for refusal in detail. You'll have an opportunity to submit a final reply if new points emerge.
What Happens After You Submit Your Appeal
Once the Planning Inspectorate receives your appeal, the case moves through a fixed sequence.
Stage 1, Validation. The Inspectorate checks the appeal form, fee (where applicable) and required documents.
Stage 2, Procedure assignment. The inspector, or the Inspectorate's case officer, decides how the appeal will be determined. There are three procedures:
Written representations, the default for most appeals. The case is decided on documents alone. It is the fastest and cheapest route, but you have no opportunity to respond to the local authority's statement in person.
Hearing, an informal round-table discussion led by the inspector. Used where there are issues that need explanation but not formal cross-examination. Usually half a day to a day.
Public inquiry, a formal, often multi-day process with evidence given under oath and cross-examination. Reserved for major or highly contentious schemes, or where the inspector decides the issues require it.
The procedure is not chosen by the appellant.
Stage 3, Timetable and statements. The Inspectorate issues a timetable.
Stage 6, Costs. Each side normally bears its own costs.
The realistic timeline for a written-representations appeal is around 6 to 9 months from submission to decision. Hearings and inquiries typically take longer. Plan your cash flow and any related project timeline around that, not around the date you submitted the appeal.
Planning Application Rejected?
Getting Professional Support for Your Appeal
Many appeals are handled by the applicant alone, but professional support significantly improves outcomes.
When professional support is worth the investment:
The refusal cited policy breaches that need expert interpretation
Design or technical issues require specialist reports
Neighbours are likely to object strongly
Your original application had significant weaknesses
You lack time to prepare a detailed response
At Sd Architecture, we guide clients through the entire appeal process.
Planning Permission Success Rates Explained (2026 Guide) provides realistic context about appeal outcomes before you commit time and resources to the process.
Professional fees vary depending on complexity. Ask for a clear fee estimate upfront so you know what you're committing to.
Frequently Asked Questions
Can neighbours appeal a planning permission decision?
Neighbours cannot appeal a planning permission that has been granted. Only the applicant (the person or organisation that applied for planning permission) can appeal a refusal or non-determination. Neighbours can, however, request a judicial review if they believe the local planning authority made an unlawful decision, though this is a separate legal process with strict time limits and higher barriers to success. If you believe a decision was procedurally flawed, consult a planning adviser about your options.
What evidence should you include in a planning appeal?
Your planning appeal evidence should support your case for why the original decision was wrong. Include policy documents showing compliance with local development plans, photographs of the site and surroundings, letters of support from neighbours or community groups, expert reports (such as structural or environmental assessments), and comparison examples of similar developments that were approved. Ensure all documents are clearly labelled, dated, and referenced in your appeal statement. The Planning Inspectorate will only consider evidence submitted with your appeal or during the appeal period, so completeness is essential.
How long does a planning appeal take?
Most planning appeals are determined within 8 to 16 weeks, depending on the appeal procedure used. Written representation appeals (the most common route) typically take 8-12 weeks. Hearings and public inquiries take longer because they require scheduling and attendance. The exact timeframe depends on the complexity of the case, the volume of representations received, and whether a site visit is needed. You should receive a decision notice from the Planning Inspectorate once determination is complete, which will outline the inspector's reasoning and the appeal outcome.
What are the odds of winning a planning appeal?
Appeal success rates vary by appeal type and local authority area. Your chances improve if you can demonstrate that the original refusal reason was not justified by planning policy, if circumstances have changed since the refusal, or if the local planning authority failed to determine your application within the statutory period. Strong evidence, a clear appeal statement, and professional support increase your likelihood of success. However, outcomes depend heavily on site-specific factors and the inspector's assessment of your case against development plan policies.
Planning appeals require precision, clear evidence, and realistic expectations. The process is structured, the deadlines are firm, and the outcome depends on the strength of your case and how well you present it. Whether you handle it yourself or hire professional support, understanding each stage, from deadline calculation to evidence gathering to the inspector's decision, gives you the best chance of success.
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