Planning Appeals in London: What to Do When Permission is Refused

A planning refusal from a London borough is frustrating, but it is not always the end of the road. The planning appeal system exists precisely to provide a check on local authority decisions — and a significant proportion of planning appeals in England are allowed, meaning the appellant gets the permission they were refused.

This guide explains the appeals process as it applies to householder and residential development applications in London: the routes available, the timescales, what the appeal considers, and what you can do to improve the chances of a successful outcome.

When to consider appealing

An appeal is worth considering when:

• —The refusal is based on policy grounds that you believe are either misapplied or outweighed by material considerations
• —The case officer's assessment of the scheme was incorrect in fact (for example, incorrect measurements, misidentification of the conservation area character, factual errors about overlooking distances)
• —The council refused on grounds that are inconsistent with similar proposals approved nearby
• —A pre-application meeting gave a positive indication that was not reflected in the decision

An appeal is less likely to succeed when:

• —The proposal is clearly contrary to local policy and the policy is reasonable and clearly stated
• —The harm identified in the refusal is real and significant
• —The scheme has not been amended to address the concerns raised — the appeal must be for the scheme as submitted, not a revised version

Before committing to an appeal, it is worth obtaining honest advice from a planning consultant with experience of the specific borough and application type. An appeal that has a low chance of success is not costless — it takes time, money, and may damage the relationship with the planning authority for future applications.

The routes of appeal

Planning appeals in England are heard by the Planning Inspectorate (PINS), an independent body. There are three procedural routes:

Written representations

The most common route for householder appeals (extensions, alterations, single dwellings). Both parties — the appellant and the local planning authority — submit written statements setting out their cases. There is no hearing. An Inspector reviews the written evidence and visits the site.

Written representations are the fastest and least expensive route. Most householder appeals proceed this way. The timetable is typically 16–24 weeks from the start of the appeal to the decision.

Hearing

A less formal oral procedure in which the Inspector leads a discussion with both parties. Used for applications of moderate complexity where the issues would benefit from being tested in discussion. Less common for straightforward householder applications; more common for larger residential developments.

Public inquiry

The most formal procedure, similar to a court hearing, with legal representation, cross-examination of witnesses, and formal proofs of evidence. Used for large or complex applications, applications where enforcement is an issue, or where the issues are sufficiently complex to require formal examination.

For the vast majority of prime London residential renovation applications, written representations is the appropriate route. If the issues are sufficiently complex — a contentious design in a sensitive conservation area, an application that attracted significant objection — a hearing may be considered.

What the appeal considers

The Inspector determines an appeal on its planning merits. They are not bound by the council's assessment, but they apply the same policy framework — the National Planning Policy Framework (NPPF) and the relevant Local Plan. They also consider:

• —The specific reasons for refusal stated by the council — these define the issues to be determined
• —Material planning considerations raised by either party
• —The site visit — the Inspector will visit the site, sometimes unaccompanied
• —Third-party representations — neighbours and others can submit comments to the appeal

Critically, the Inspector decides the appeal on the scheme as submitted. They cannot consider amendments to the scheme. If the refusal identified a specific design concern — an overlooking window, an extension that is too large — the answer is to address it in a revised application, not to appeal the original scheme.

Grounds of appeal: what the Inspector looks for

Policy compliance

The primary test is whether the scheme complies with the development plan (the Local Plan) and national planning policy. Where there is a conflict with a specific policy, the appellant must demonstrate either that the policy is misapplied or that the conflict is outweighed by material considerations.

For prime London renovation — in conservation areas, in the curtilage of listed buildings — the policy framework is well-developed. The appellant's case typically argues either that the scheme preserves or enhances the character of the conservation area (meeting the statutory test under the Planning (Listed Buildings and Conservation Areas) Act 1990) or that the harm to character is less than significant and is outweighed by other considerations.

Officer assessment errors

Where the refusal is based on an assessment of fact that is incorrect — a measurement that is wrong, an assertion about the impact on a neighbour's daylight that is inconsistent with the BRE Guide methodology — the appeal provides an opportunity to demonstrate the error with evidence.

This requires technical evidence: daylight and sunlight assessments from qualified consultants, accurate site surveys, photomontages from the correct viewpoints. The strength of the technical case determines the weight the Inspector gives to the factual argument.

Precedent

A scheme that is materially similar to others that have been approved in the same conservation area or street — either recently or historically — has a strong precedent argument. Inspectors give weight to consistency in decision-making.

Identifying relevant approved schemes and documenting the comparison is a significant part of appeal preparation for conservation area applications.

The role of the planning consultant

A planning consultant with experience of the relevant borough and application type is essential for any appeal that involves substantive policy issues. They will:

• —Advise honestly on the strength of the case before committing to the appeal
• —Prepare the appellant's statement of case and grounds of appeal
• —Identify and commission specialist technical reports where needed
• —Manage the appeal correspondence with PINS and the local authority
• —Attend any hearing or inquiry on the appellant's behalf

A planning consultant also manages the relationship with the local authority during the appeal process. Councils sometimes agree to grant permission or negotiate a revised scheme during the appeal, avoiding the need for the appeal to be determined. This is more common than it might seem — councils do not always defend their decisions vigorously, particularly when the legal costs of a contested appeal are a consideration.

Alternative to appeal: revised application

In many cases, the better response to a refusal is a revised application rather than an appeal. If the refusal identifies specific concerns — a design element that is not acceptable, a scale that exceeds local guidelines — addressing those concerns in a revised scheme and resubmitting is often faster and more certain than appealing the original proposal.

A revised application can be submitted at any time; there is no restriction on making further applications for the same site. If the council has indicated informally (in a pre-application meeting or the officer's report) what would be acceptable, designing to that acceptance and submitting a revised scheme avoids the uncertainty and cost of an appeal.

The decision between appealing and reapplying should be made with advice from a planning consultant who can assess the strength of the appeal case honestly.

Costs

Planning appeals are not free. The main cost components are:

• —Planning consultant fees — preparation of the appeal statement, management of the process; typically £3,000–£8,000+ for a written representations appeal
• —Technical reports — daylight and sunlight, heritage impact, transport; as required by the issues raised in the refusal
• —Barrister or solicitor fees — for hearings and public inquiries; significant additional cost
• —Award of costs — in exceptional cases, an Inspector can award costs against a party whose behaviour in the appeal was unreasonable. Costs are rarely awarded in householder appeals, but the risk exists if either party behaves in a way the Inspector finds unreasonable.

The appeal fee to PINS was abolished in England; there is no fee for submitting an appeal.

Timescales

Planning appeals are slow. Written representations appeals currently take 16–24 weeks from the start date to the Inspector's decision. Hearings and inquiries take longer — often 9–18 months from submission to decision for complex cases.

This means an appeal must be weighed against the alternative of a revised application, which can typically be determined in 8 weeks (householder) or 13 weeks (major development). For a scheme where a modest amendment would address the council's concerns, a revised application is likely to deliver a decision in less time than a successfully appealed refusal.

ASAAN works with planning consultants and architects who have a track record in London planning appeals. If a project has been refused and you are considering an appeal, contact us to discuss the options. You may also find our guides on pre-application advice and conservation area renovation useful background.