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How long does planning really take?

How long does planning really take?

The honest answer is… it depends!

It’s one of the first questions clients ask us, and the answer is rarely as simple as 8 weeks, which we know isn’t the answer that you want to hear!

For a straightforward planning application, the statutory determination period is generally:

  • 8 weeks for most minor and householder applications;
  • 13 weeks for major applications; and
  • 16 weeks where an Environmental Impact Assessment is required.

However, these timescales relate to the determination of the application, not the entire planning process.

In reality, the overall timeframe can be considerably longer…

Stage 1 (if recommended): Pre-Application (2-8+ weeks) 

Before submitting an application, it can be worthwhile to seek pre-application advice from the Local Planning Authority (LPA), providing you with an opportunity to understand how the Council is likely to view your proposal before committing to a full application.

The timeframe varies significantly between Councils and depending on the complexity of the proposal. For example, a simple project may be relatively quick, whereas a larger or more complex development, it can take several months.

Whilst this does add some time onto the planning process, our advice is to not underestimate this stage, as a little more work before submission can sometimes save a lot of time in the long run!

Stage 2: Preparing the application (2–12+ weeks)

This is often the part of the process that some clients don’t always see.

A planning application isn’t just a form and a set of drawings. Depending on the proposal, it may require input from architects, highways specialists, ecologists, arboriculturalists, flood risk experts, landscape professionals, heritage specialists and other technical experts.

The amount of information required will depend on the scale, location and nature of the development.

This stage can therefore take anywhere from a couple of weeks to several months.

Stage 3: Submission and validation (around 1–4 weeks)

Once the application is submitted, the LPA will check that the necessary information has been provided. This is known as validation.

As with the Pre-Application process, the validation timeframe varies significantly between Councils!

If everything is in order, the application will be validated, and the determination period will begin. Alternatively, if information is missing, the Council may request further documents before validating the application.

This is one reason why getting the submission right the first time can make a real difference!

Stage 4: Consultation and determination (8–16 weeks) 

Once validated, the application enters the formal determination process.

The Council may consult upon the following:

  • Local residents;
  • Parish or town councils;
  • Highways authorities;
  • Environmental bodies;
  • Heritage consultees;
  • Drainage authorities; and
  • Other relevant statutory consultees.

The planning officer will then assess the proposal against relevant planning policies and other material considerations.

For many applications, this is where the statutory 8-week or 13-week period applies, however that doesn’t necessarily mean you’ll receive a decision exactly on the final day. Many applications can take longer where there are outstanding issues, objections, amended plans or negotiations with the Council.

Stage 5: Amendments and negotiations: potentially several weeks or months

This is one of the biggest reasons planning applications can take longer than expected, as the Council may identify concerns with the proposal.

That doesn’t necessarily mean the application is going to be refused. Often, there is an opportunity to amend the scheme or provide additional information to address those concerns.

For example, this could involve:

  • Reducing the scale of a development;
  • Changing the design;
  • Altering access or parking arrangements;
  • Providing additional landscaping;
  • Addressing ecological concerns; or
  • Revising plans following neighbour comments.

These discussions can improve the prospects of achieving permission, but they can also extend the overall programme.

Stage 6: The decision isn’t always the end

Even once planning permission has been granted, there may still be work to do.

A permission may be subject to planning conditions which need to be discharged before development can commence or before particular works can take place.

There may also be:

  • Section 106 agreements
  • Biodiversity Net Gain requirements
  • Community Infrastructure Levy requirements
  • Building Regulations
  • Other technical approvals

For some developments, this post-permission stage can take several more weeks or months.

Further to the above, further delays may be caused when an application is called in to Planning Committee, as there can be an additional wait for the next available committee meeting. If an application misses the agenda deadline, this can push the decision back by several weeks.

How to get in touch…

Having a consultant involved in your project, is a great way to reduce the risk of errors and it can drastically speed up the timeline for achieving planning permission.

If you think you need support with your project, we’d be happy to help.

You can contact us directly via the details below, or if you would prefer, you can fill in the form below and one of the team will be in touch.

T: 01908 592580
E: info@warnerplanning.co.uk

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How long does planning really take?

It’s one of the first questions clients ask us, and the answer is rarely as simple as 8 weeks, which we know isn’t the answer that you want to hear!

Categories
Industry Knowledge News Planning Advice

AI and Planning: The Future of Applications?

AI and Planning: The Future of Applications?

Artificial Intelligence seems to be taking over every aspect of life at present, with professional conversations in planning being no exception.

In terms of the potential impact on planning applications, the opportunity is significant and vast. AI has the potential to help all parties within the planning system to deal with large volumes of information more efficiently, identify relevant policy and constraints earlier, and make the application process easier to navigate.

Some examples of how AI could be used to assist in planning:

  • Review planning policy and identify relevant requirements for validation at an early stage.
  • Analyse application documents and highlight missing or inconsistent information.
  • Summarise lengthy technical reports and consultation responses.
  • Help planning teams identify recurring issues and patterns across applications.
  • Make planning information more accessible to applicants and communities.
  • Reduce the administrative burden that can slow down decision-making.

But there is an important distinction to make, as planning is not simply a data-processing exercise, but good planning requires professional judgement. It involves balancing policy, design, technical evidence, local circumstances, environmental considerations, community interests and needs of all the parties. Those decisions can have consequences for places and communities for decades, so data alone cannot be relied upon.

That means the most valuable role for AI is about augmenting professional judgement.

If AI can reduce the time spent searching documents, processing information and carrying out repetitive administrative tasks, planners can spend more time on the things that require human expertise, such as understanding places, negotiating better schemes, engaging with communities and exercising sound planning judgement.

There are, of course, important questions around accuracy, transparency, accountability and data quality. AI outputs need to be treated as evidence to interrogate, rather than answers to accept unquestioningly. Used well, however, AI could help create a planning system that is faster and more accessible without sacrificing the quality of decision-making.

How is AI already being used in Planning?

In June 2026, the UK government announced plans to start using an AI prototype to help officers determine Householder applications in half the time, shortening the process from the current 8 weeks to only 4 weeks. It is currently being trialled at Barnet, Camden and Dorset councils where applications are triaged, summarised and planning officers given an initial assessment of the proposals that they can consider when making their decision.  This illustrates how AI can be used effectively without taking away the professional judgement of the case officer. 

A second AI tool called Extract is also now being used by all councils across England to help planning officers convert decades-old planning documents and maps into usable data in minutes. 

The hope is that by freeing up thousands of hours of time, planning officers will be able to focus on decision making which will speed up housebuilding across the country as well as improving reliability, reducing costs and saving time for councils and developers.

AI tool to slash planning decision times as government accelerates push to build 1.5 million homes – GOV.UK

Extract – Tools – AI Knowledge Hub

Extract: Using AI to unlock historic planning data  – MHCLG Digital

Extract identifying Ground Control Points to georeference the old map. Image created using OpenStreetMaps. (Source mhclgdigital.blog.gov.uk)

There is no question that AI will play a role in planning applications, but where we should draw the line between automation and professional judgement to ensure we keep the human element to the decision making process?

Where do you think AI could make the biggest difference in the planning application process?

How to get in touch…

Having a consultant involved in your project, is a great way to reduce the risk of errors and it can drastically speed up the timeline for achieving planning permission.

If you think you need support with your project, we’d be happy to help.

You can contact us directly via the details below, or if you would prefer, you can fill in the form below and one of the team will be in touch.

T: 01908 592580
E: info@warnerplanning.co.uk

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