The Planning Appeal Process in London After a Refusal (2026)

What is a planning appeal and who decides it in London?

A planning appeal is a formal request to the Planning Inspectorate (PINS) to overturn a local planning authority's decision. In London that authority is one of the 33 boroughs — a London borough council or the City of London — but the appeal itself is decided by an independent planning inspector appointed nationally, not by anyone connected to the council that refused you. The inspector re-determines the application on its planning merits, applying the same National Planning Policy Framework and the borough's Local Plan that the council was meant to apply.

Crucially, the right of appeal belongs to the applicant alone. A neighbour who dislikes an approval cannot appeal it; their only route is a judicial review of the process. As the refused applicant, you can appeal a refusal, a set of conditions you find unacceptable, or a council's failure to decide within the statutory period (a non-determination appeal). The inspector's decision is final in planning terms — it can only be challenged onward in the High Court, and then only on a point of law, not because you disagree with the planning judgement.

What is the deadline to appeal in London?

Deadlines are strict and the Inspectorate has no general discretion to extend them, so this is the first thing to check on your decision notice. For a householder application — the category that covers most extensions, lofts and conversions on a single dwelling — you have 12 weeks from the date on the decision notice to submit your appeal. For most other applications, including full planning applications for new dwellings or changes of use, the window is 6 months from the decision date.

Where you are appealing an enforcement notice the clock is much tighter, and where the council has simply failed to determine your application in time, the 6-month or 12-week period runs from the date by which it should have decided. Miss the deadline and the right of appeal is lost entirely — your only remaining option becomes a fresh application. Because the householder window is so much shorter than the general one, London homeowners are the group most often caught out, so diarise the date the moment a refusal lands.

• Householder appeals — 12 weeks from the decision notice date
• Full planning, listed building and most other appeals — 6 months from the decision date
• Enforcement notice appeals — before the date the notice takes effect (often around 28 days)
• Non-determination appeals — the same 12-week or 6-month window, run from the date the council should have decided
• The deadlines are fixed in law; PINS cannot extend them, so late appeals are simply refused

What are the three appeal procedures and which will apply?

The Inspectorate offers three procedures, and the choice is driven by how much evidence and cross-examination a case genuinely needs rather than by preference. The overwhelming majority of London householder appeals are decided by written representations, the fastest and cheapest route, where the inspector reads the papers from both sides and usually makes an unaccompanied or accompanied site visit before issuing a written decision. For a straightforward extension refusal this is almost always the right and only proportionate choice.

A hearing is a more discursive, round-the-table discussion led by the inspector, used where a case benefits from questions being put to both parties but does not warrant formal legal process. An inquiry is the most formal route, with advocates, witnesses and cross-examination under oath, reserved for large, complex or highly contested schemes — the kind of major residential development that rarely features in a household appeal. The more formal the route, the longer and more expensive it becomes, which is another reason written representations dominate at the domestic scale.

What are valid grounds for a planning appeal?

An appeal must argue that the council's decision was wrong in planning terms, and the only way to do that convincingly is to answer each stated reason for refusal head on. A decision notice lists numbered reasons — perhaps that a two-storey extension is overbearing, that a dormer harms the character of a conservation area, or that the proposal conflicts with a named Local Plan policy. Your statement of case must take each reason in turn and demonstrate, with reference to policy, guidance and the site's context, why the officer's conclusion does not hold.

Strong grounds are grounded in material planning considerations — policy compliance, design quality, the actual effect on neighbours' amenity, highway safety, heritage impact and relevant appeal decisions elsewhere. Weak grounds are the personal ones inspectors are bound to disregard: that you have already spent money, that a neighbour's own extension is larger, or that you need the space. Where a nearby, genuinely comparable approval or a supportive appeal decision exists, citing it carries real weight, because consistency of decision-making is itself a planning principle the inspector must respect.

How much does a planning appeal cost, and can costs be awarded?

The appeal itself is free to lodge — the Planning Inspectorate charges no fee to submit an appeal, which is a deliberate contrast with the council's original application fee. Your real cost is the professional work of preparing a persuasive statement of case and, where relevant, refreshed drawings that illustrate the argument. For a written-representations householder appeal in London that is a modest, one-off preparation cost; for a hearing or inquiry it climbs sharply because of the consultant and, at inquiry, legal representation involved.

Costs can, however, be awarded between the parties, but only for unreasonable behaviour, not simply for losing. If the council defended a refusal with vague, unsubstantiated reasons or ignored clearly relevant evidence, an inspector can order it to pay the costs you wasted as a result — and equally, an appellant who pursues a hopeless appeal or misses deadlines can be ordered to pay the council. Awards are the exception rather than the rule, so you should budget on the basis that each side normally bears its own costs and treat any award as a bonus, not a plan.

Should you appeal or resubmit an amended application instead?

This is the decision that most often saves a London homeowner both time and money. An appeal defends the identical scheme the council refused — you cannot amend it, and if the refusal reasons are sound, you are asking an inspector to disagree with a fair judgement, which is an uphill battle. A resubmission, by contrast, lets you redesign to remove the objection: pull a rear extension back by half a metre, redesign a dormer to sit below the ridge, or drop the storey that caused the overbearing concern. Where the refusal reasons are curable by design, resubmitting is almost always faster and surer than appealing.

There is also a practical lever unique to resubmission. Many councils offer a free-go application within twelve months of a refusal on the same site, letting you submit an amended scheme without paying a second application fee — and at DrawingsDirect our free redraws to approval mean we revise the drawings for that resubmission at no further charge. Reserve the appeal route for cases where you believe the scheme was acceptable as submitted and the council simply got the planning balance wrong, or where the refusal reasons are matters of principle that no redesign could satisfy. Reading which situation you are in is exactly what the officer's reasons for refusal are there to tell you.

What are the realistic chances of success?

It pays to be clear-eyed. Nationally, roughly a third of householder appeals succeed, and the figure for full planning appeals is broadly similar — so the majority of appeals are dismissed, and an inspector will not overturn a well-reasoned refusal simply because you feel strongly. The cases that win tend to share a pattern: a refusal built on thin or generic reasoning, a scheme that genuinely complies with the Local Plan on a fair reading, and a statement of case that meets every refusal reason with policy and precedent rather than personal need.

Your odds improve sharply when the appeal is well matched to the facts. A design-led refusal in a conservation area is hard to overturn if the harm is real; a refusal that leant on a policy the scheme actually satisfies, or that ignored a directly comparable local approval, is far more vulnerable. This is why the honest first step after any refusal is a cold appraisal of the officer's reasons against the development plan — a professional read of those reasons will usually tell you within an afternoon whether you have a genuine appeal, a straightforward resubmission, or a scheme that needs rethinking.