Quick answer: Pre-application planning advice is an informal opinion from your local planning authority on a proposal before you submit a formal planning application. It can be worth paying for when a project is large, sensitive or open to interpretation, such as a significant extension, a new home, work in a conservation area or a site in the green belt. It is less useful for straightforward schemes that clearly follow local policy. The advice is not binding and does not guarantee planning permission, but a well-prepared request can reduce risk and show you where a design needs to change while change is still relatively easy.

Planning permission is rarely just a box to tick. For ambitious residential projects, it often shapes the design itself.

Most homeowners first hear about pre-application advice, often shortened to "pre-app", once an architect or planning consultant suggests it. It costs money, it takes time and it doesn't give you a decision, so it is reasonable to ask whether it is worth it.

The honest answer is that it depends on the project. Here, we explain what pre-application advice is, when it tends to help, what the process involves and how to get the most value from it.

What is pre-application planning advice?

Pre-application advice is a service offered by local planning authorities that lets you discuss a proposal with a planning officer before you apply. The government's planning practice guidance describes pre-application engagement as a collaborative process between a prospective applicant and other parties, and says it offers significant potential to improve both the efficiency and effectiveness of the planning system.

In practice, you send the council information about your property and what you would like to do. A planning officer then reviews it against local and national policy and gives you their view. That might cover:

whether the principle of the development is likely to be acceptable
concerns about scale, height, massing or design
the impact on neighbours, such as overlooking, loss of light or an overbearing effect
heritage, conservation area or green belt issues
what information a formal application would need to include

For householder projects in England, such as extensions and alterations to an existing home, pre-application advice is not a legal requirement. Councils encourage it, but you can still submit a valid planning application without it.

When is pre-application advice worth it?

Pre-app tends to earn its fee when there is genuine uncertainty about how a council will view a proposal.

The new National Planning Policy Framework, published in August 2026, treats larger and smaller schemes differently. For major development, which in planning terms broadly means housing schemes of 10 or more homes or sites of 0.5 hectares or more, policy DM1 expects proposals to be informed by early engagement with neighbours, the local community and the local planning authority. For other development, which covers ordinary householder projects, the framework only says that pre-application engagement may also be required where proposals raise complex planning matters, with heritage given as an example. So for a typical extension, pre-app remains your choice, while a small development or a scheme affecting a listed building is more likely to be expected to involve it.

For residential projects, it is often worth considering when:

The scheme is large or unusual

A substantial two storey extension, a significant remodel that changes the character of a house, or a contemporary design in a traditional street can all be judged in different ways. Early feedback helps you understand where the line is likely to fall.

The site is sensitive

Listed buildings, conservation areas, green belt land and sites close to neighbours all bring extra policy tests. These are the cases where officers' early views are most useful, because the design can respond to them from the start.

You are building a new home or a small development

New dwellings raise questions about the principle of development, access, density, landscape and the character of the area. Testing those questions before investing in full application drawings can save considerable time and money.

A previous application was refused

If a council has already refused a similar scheme, pre-app can help you understand whether a revised design is likely to overcome the reasons for refusal, or whether an appeal is the better route. Our article on what to do if planning permission is refused covers the options.

When might you not need it?

Pre-app is not always the best use of time or budget. If your project is modest and clearly in line with local policy, it may add weeks without telling you much you didn't already know.

Some projects don't need planning permission at all. Many smaller extensions fall under permitted development rights, although some still need prior approval. If you want certainty that a permitted development project is lawful, the Planning Portal explains that a Lawful Development Certificate is a legal document confirming the lawfulness of proposed work.

It is worth keeping the two separate. A Lawful Development Certificate is a formal application that results in a decision on whether the work is lawful without planning permission. Pre-application advice is an informal, non-binding opinion on a scheme that will need planning permission. If your project may fall within permitted development, an LDC is usually the right tool; if it clearly needs permission, pre-app is the one to consider. Our guide to whether you need planning permission explains where the lines usually fall.

For some straightforward householder schemes, a well-prepared full application can be the more efficient choice. An experienced architect can help you weigh this up for your property.

What does the process involve?

Each council runs its own service, so the details vary. In most cases, the process follows a similar pattern.

1. Preparing the request

Councils usually ask for a completed form, a site location plan, a description of the proposal and drawings or sketches that show what you intend to build. Photographs of the property and its surroundings are often helpful. The Planning Portal advises being fully prepared to describe your proposals and show plans.

2. Paying the fee

Most councils charge for pre-application advice, and the fee depends on the type and scale of the project.

3. Officer review and response

Depending on the council and the level of service, you may receive written advice only, or a meeting or site visit as well. Response times vary from around a month to six weeks or more, so it is important to build pre-app into the programme rather than treat it as a quick check.

4. Refining the design

The response is a starting point. Some comments will be firm policy concerns, while others will be matters of judgement that can be addressed through design, additional information or a clearer explanation of the proposal.

How much does pre-application advice cost?

There is no single national fee in England. Councils set their own charges for pre-application advice under the Local Government Act 2003, and the government's guidance says those charges must not exceed the cost of providing the service.

As a result, fees vary widely. At the time of writing, in November 2026:

Sheffield City Council charges £126 including VAT for a householder desk-based review
Leeds City Council charges £156 including VAT for house extensions, outbuildings and alterations, with a typical response time of 20 working days
Islington Council charges £480 including VAT for written householder advice, or £700.80 with a site visit

Fees usually change each April, and some councils offer several levels of service. Always check your own council's website before applying. You should also budget for the time needed to prepare drawings and supporting information, as this is usually the larger cost.

What pre-application advice can't do

This is the most important point to understand. Pre-application advice is not a planning decision.

The government's guidance is clear that pre-application engagement cannot pre-empt the democratic decision making process or a particular outcome. Leeds City Council's service, for example, states that its advice does not constitute a formal response or decision of the council.

There are several reasons why positive feedback may not lead to approval:

officers can only comment on the information provided, and a full application will be assessed in more detail
neighbours and consultees haven't yet had their say
planning policy can change, as it did with the new National Planning Policy Framework in 2026
applications may be decided by a planning committee rather than the officer who gave the advice

That said, the advice still carries weight. The guidance notes that it could be a material consideration in a later decision, and the new framework asks councils to take account of planning matters raised during any pre-application engagement. A scheme that has responded thoughtfully to pre-app comments is in a stronger position than one that hasn't.

How an architect can help

The quality of the advice you receive depends heavily on the quality of what you submit. A vague sketch tends to produce a cautious, general response. A clear, well-reasoned proposal gives officers something specific to respond to.

An architect can help at each step:

Deciding whether pre-app is worthwhile for your property, or whether another route makes more sense
Understanding the policy context, including local design guidance, heritage designations and any planning history
Preparing drawings and a short design statement that explain the thinking behind the proposal
Interpreting the response, separating firm objections from points that can be addressed through design
Developing the scheme so the formal application responds clearly to the feedback

At CODA Bespoke, planning is considered from the very first conversations. For projects where the planning position is less certain, an architectural feasibility study can help test what may be possible before a pre-app request is prepared. You can read more about how we work on our process page.