How long does planning permission take?
The short answer: 8 weeks for the council to decide once they’ve validated your application. The real answer, including everything between “I want to extend my kitchen” and “I have a decision”, is usually 3 to 6 months. This guide walks through each stage with realistic timelines, what causes delays, and how to avoid the most common pitfalls.
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Check my project — freeThe full timeline, stage by stage
Most homeowners underestimate how long the whole process takes because they only think about the 8-week council decision. Here’s everything:
Stage 1: Design & drawings
4–8 weeksBrief your architect or designer, iterate on designs, finalise drawings (site plan, floor plans, elevations, maybe sections and a design statement). Most of this time is back-and-forth on the design, not actual drawing time. Rushing this stage is the most common cause of later refusals.
Stage 2: Optional pre-application advice
+2–4 weeksSubmit a pre-app query to your council, get a non-binding opinion from a planning officer. Useful for borderline projects or conservation areas. Councils take 2–4 weeks to respond. Costs £50–£500. Skip if your project is simple and obviously within policy.
Stage 3: Submission & validation
1–3 weeksUpload your application to the Planning Portal (the national submission site) or your council’s own portal. Pay the £258 fee. Wait for the council to validate: they check that you’ve included all required documents, plans, and certificates. For a complete submission this takes 1–2 weeks. For an incomplete submission, expect 2–4 weeks of back-and-forth before the 8-week clock starts.
Stage 4: Public consultation
21 daysOnce validated, the council advertises your application and notifies neighbours. The consultation period is 21 days. Neighbours can object, support, or comment. This runs in parallel with officer assessment, so it doesn’t add separate time to the 8-week statutory target — but objections can trigger additional investigation, site visits, or committee referral.
Stage 5: Officer assessment & decision
8 weeks (target)The statutory 8-week target. During this period the officer reviews your proposal against local plan policy, visits the site if needed, consults internal experts (highways, heritage, drainage, trees), considers objections, and makes a recommendation. Most householder applications are decided under officer delegation. If the application goes to a planning committee, add 4–6 weeks more.
Stage 6: Decision notice issued
ImmediateThe council publishes a formal decision notice: approved, approved with conditions, or refused. Conditions often require specific materials, construction details, or mitigation measures. You can start work as soon as you have the decision notice (and building regulations approval), and permission lasts 3 years from the decision date.
Realistic total timelines
| Application type | Best case | Typical | Worst case |
|---|---|---|---|
| Householder planning | 10 weeks | 14 weeks | 6 months (if refused & resubmitted) |
| Lawful Development Certificate (LDC) | 6 weeks | 8–10 weeks | 12 weeks |
| Prior Approval (larger rear extension) | 42 days | 42 days | 42 days (statutory hard cap) |
| Listed building consent | 10 weeks | 14 weeks | 6+ months |
| Planning appeal (written representations) | 4 months | 6 months | 9+ months |
How to shorten the timeline
- Make sure your first submission is complete. The biggest avoidable delay is submitting with missing documents. Your architect should use a pre-flight checklist against the council’s local validation requirements.
- Use pre-application advice for borderline cases. A £250 pre-app that identifies a design flaw before you apply saves you the full 8–12 week cycle of a refused application.
- Check if your project is actually permitted development. An LDC is 6–10 weeks with a £129 fee; a full application is 10–14 weeks with a £258 fee and higher architect costs. If you qualify for LDC, use it.
- Pick a designer who knows your council. Familiarity with the local validation checklist, common refusal reasons, and officer preferences cuts weeks off the submission-to-decision cycle.
- Respond to officer queries fast. If an officer asks for additional information during the 8-week period, the clock pauses. Respond within a day or two, not a week.
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Frequently asked questions
How long does planning permission take in the UK?
The statutory target is 8 weeks from the moment the council validates your application. In practice, most householder decisions arrive between 8 and 12 weeks after submission, with some councils running later in busy periods. Before that, you usually spend 4–8 weeks on design and preparation with an architect, and 1–3 weeks waiting for the council to validate the submission. Realistic total time from “I’ve decided to extend” to “I have a decision” is 3–6 months.
What is the 8-week statutory target?
Under the Town and Country Planning Act 1990, councils have a statutory target of 8 weeks to determine a minor householder application and 13 weeks for major applications. The 8-week clock starts when the council formally validates your application (not when you submit it). If the council misses the target, you have the right to appeal on grounds of non-determination, but in practice most homeowners just wait.
How long does validation take?
Validation is when the council’s planning team checks that your application includes all the required documents, fees, and drawings. For a complete, well-prepared submission, validation usually takes 1–2 weeks. For an incomplete submission, the council will write back asking for missing items, which can add 2–4 weeks before the statutory 8-week clock even starts. Most delays at this stage are avoidable by working with an experienced architect.
What is a Lawful Development Certificate and how long does it take?
A Lawful Development Certificate (LDC) is a legally binding confirmation from your council that your project is permitted development and doesn’t need planning permission. LDCs have the same 8-week statutory target as full planning applications. The application is simpler (no public consultation), so decisions often come back within 6–8 weeks. The fee is £129 (half the full planning fee).
What causes planning applications to take longer than 8 weeks?
The most common delays: the council asks for additional information mid-review (which pauses the 8-week clock); the application is referred to a planning committee instead of being decided by officers under delegated powers (adds 4–6 weeks); objections from neighbours trigger a site visit; the application is complex enough to need specialist consultee input (highways, heritage, ecology); or the council is simply running behind on workload. Householder applications rarely go to committee — most are decided under officer delegation.
Can I appeal a planning refusal? How long does that take?
Yes. You have 12 weeks from the decision date to lodge an appeal with the Planning Inspectorate. Appeals by written representations (the fastest route for householder cases) typically take 4–6 months from lodging to decision. A hearing or inquiry adds 3–6 months more. Appeals are free to submit, but the professional input needed to win one usually costs £2,000–£10,000 and success rates for householder appeals hover around 33–40%.