A pre-application meeting with a London planning officer costs time and money. Done well, it can transform the outcome of a planning application. Here is when to use it and what to ask.
Most planning applications in London are submitted without any prior engagement with the local planning authority. The applicant — or their architect — prepares a scheme, submits the drawings, and waits. For straightforward applications in boroughs with clear and consistent policies, this can work perfectly well.
For applications that are in any way complex — proposals in conservation areas, extensions to listed buildings, developments that might give rise to concerns about overlooking or character — submitting without prior engagement is a significant risk. A refusal costs time, money, and potentially programme. A refusal that then requires an appeal costs considerably more.
Pre-application advice is the mechanism for avoiding this. This guide explains what it is, how it works across London's boroughs, when it is worth commissioning, and how to use it effectively.
What pre-application advice is
Pre-application advice (commonly called pre-app) is a formal service offered by London's local planning authorities that allows an applicant to present a proposed scheme to a planning officer and receive written feedback before submitting a formal application.
The feedback addresses:
- —Whether the principle of the proposed development is acceptable in policy terms
- —Specific concerns the planning officer has about the scheme as presented
- —What changes, if any, would make the application more likely to succeed
- —What supporting documents and evidence the authority will expect with the application
Pre-app is not a guarantee of approval. The officer who conducts the pre-app is not necessarily the officer who will determine the application. Policy can change. But a well-conducted pre-app engagement significantly reduces the risk of surprises and — crucially — gives the applicant and their design team the information needed to submit the strongest possible application.
How it works across London boroughs
Pre-application advice services vary significantly across London's 33 planning authorities. The key variables are:
Fee
Almost all London boroughs charge for pre-app. Fees range from around £500 for a simple householder enquiry to £3,000–£10,000+ for larger or more complex proposals. Some boroughs have tiered fee structures based on the scale and complexity of the proposal; others charge a flat rate.
The fee should be viewed as insurance, not overhead. A £2,000 pre-app that prevents a refusal on a £1,000,000 renovation project is an extremely good investment.
Format
Most boroughs now offer pre-app as a written service (submit drawings and a description; receive written feedback) or a meeting service (submit drawings, attend a meeting with the case officer, receive follow-up written feedback). For complex applications, the meeting format is almost always preferable — the ability to discuss concerns in real time and clarify ambiguities is valuable.
Some boroughs in prime central London — Westminster, Kensington & Chelsea, Camden — have dedicated pre-application services for complex or high-value residential proposals, often with more senior officers and faster response times. These are worth using where available.
Conservation area and heritage pre-app
For applications involving listed buildings or properties in conservation areas, some boroughs offer specific pre-app services involving their Conservation Officer rather than or in addition to a development management officer. This is particularly valuable where the application involves works to the external appearance of a listed building or any feature of special architectural or historic interest.
The Conservation Officer's view often carries significant weight in the determination of listed building consent applications, and engaging them at the pre-app stage — understanding their concerns before they are stated in a refusal — is good practice.
When pre-application advice is worth commissioning
Not every application benefits from formal pre-app engagement. The cases where it adds most value are:
Applications in conservation areas
Policy in conservation areas is interpreted with significant discretion by individual officers. What one officer considers acceptable in terms of materials, fenestration, or massing, another may refuse. Pre-app gives the applicant a view of how the specific proposal will be read by the authority — and allows design adjustments before formal submission.
See our conservation area renovation guide for the full policy context.
Listed building consent applications
The bar for listed building consent is high, and a refusal is more consequential than a refusal of planning permission — it affects not only the application but the record of the property and can complicate future applications. Pre-app with the Conservation Officer before submitting a listed building consent application is advisable on all but the most straightforward proposals.
Applications likely to be contentious with neighbours
Where a proposed extension or alteration is likely to attract objections from neighbouring owners — an upward extension in a terrace, a rear extension that affects a neighbour's light, a basement that involves party wall works — pre-app allows the applicant to understand how the authority is likely to weigh those objections before committing to a scheme.
This is not about managing the neighbours (that is a separate conversation); it is about understanding the planning officer's likely position before a formal application triggers a consultation process.
Applications where policy is ambiguous or in transition
London's planning policy is in constant development. Local Plans are periodically reviewed and replaced; supplementary planning documents are updated; national planning policy changes. Where the relevant policy is recent, ambiguous, or known to be under review, pre-app gives the applicant an early read on how the authority is currently interpreting it.
Schemes that depart from guidance
Where the proposed scheme represents a departure from standard guidance — a larger extension than the rule of thumb, an unusual material, a design that breaks from the character of the immediate area — pre-app allows the applicant to present the design argument directly to the officer and gauge whether it is likely to be persuasive.
How to use pre-application advice effectively
A pre-app meeting is only as good as the preparation that goes into it. The following principles apply:
Submit complete, accurate drawings
The feedback you receive from a pre-app is only as useful as the scheme you present. Submit drawings that accurately represent what you intend to build, at a sufficient level of detail for the officer to assess the key issues. Vague or underspecified drawings produce vague feedback.
Frame the right questions
A pre-app is an opportunity to get specific answers to specific questions. Rather than asking "will you approve this?", ask: "We have concerns about the roof material — what is your view on the use of zinc cladding in this conservation area?" or "Is there a maximum extension depth for this property type that the authority will support?"
The more specific the question, the more useful the answer.
Bring supporting evidence
Where the scheme is justified by precedent — similar approved extensions nearby, comparable listed building consents granted in the area — present this evidence at the pre-app stage. Officers respond to well-prepared applications, and a design team that has done its homework is more persuasive than one that has not.
Act on the feedback
Pre-app feedback is only useful if it is used. Where an officer has identified a specific concern — a roof extension is too large, a material is inappropriate, a window will cause overlooking — the applicant must decide whether to address it in redesign or to proceed regardless and make the case in the application. Proceeding regardless, without addressing the stated concern and without a strong counter-argument, rarely succeeds.
The relationship between pre-app and application
Pre-app feedback should be referenced in the Planning Statement submitted with the formal application. Officers expect to see that their feedback has been considered, and an application that demonstrably addresses the concerns raised in pre-app is in a much stronger position than one that ignores them.
Where the officer's pre-app view was positive and the scheme has not materially changed, the Planning Statement can say so directly. Where the scheme has changed in response to pre-app feedback, the nature of the changes and the reasons for them should be explained.
ASAAN works with planning consultants and architects who have established relationships with planning officers across all prime London boroughs. On projects where planning risk is a material concern, we recommend commissioning pre-application advice before finalising a scheme. If you would like to discuss the planning strategy for a proposed renovation, contact us. You may also find our guides on planning permission vs building regulations and listed building renovation useful background reading.
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