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Most householder planning applications (extensions, loft conversions) take 8 weeks from receipt of a valid application to decision, while major developments take 13 weeks or more. In practice, the real timeline is often longer — 8-12 weeks for householder applications and 16-26 weeks for major schemes — due to validation delays, additional information requests, and committee scheduling. This guide breaks down every stage of the timeline, explains what causes delays, and shares practical tips to speed things up.
Statutory Timescales: What the Law Says
What is validation?
Validation is the process where your local council checks that your planning application is complete — all forms filled correctly, correct fee paid, and all required documents submitted. The statutory determination clock (8 or 13 weeks) runs from the day after the council receives a valid application, so it does not start until everything required, including the fee, has been lodged (DMPO art 34(2) and (4)). Incomplete applications are returned for correction, adding weeks to the timeline.
Local planning authorities (LPAs) in England are required by law to determine planning applications within set timeframes (DMPO 2015 art 34). These are known as statutory determination periods.
Householder Applications: 8 Weeks
If you're applying for planning permission for works to your house — such as an extension, loft conversion, or outbuilding — the council has 8 weeks from receiving a valid application to make a decision.
This 8-week clock starts the day after the council has everything it needs for a valid application (all forms, fees, and documents correct). If you submit an incomplete application, the clock doesn't start until everything is in order.
Minor Applications: 8 Weeks
Minor applications include:
- Residential developments of fewer than 10 dwellings
- Commercial developments under 1,000 square metres
- Changes of use
These also have an 8-week determination period.
Major Applications: 13 Weeks
Major developments include:
- 10 or more new dwellings
- Housing on a site of 0.5 hectares or more where the number of homes isn't yet known
- New floorspace of 1,000 square metres or more
- Any development on a site of 1 hectare or more
- Waste and minerals applications
(These are the categories in the definition of "major development" in DMPO 2015 art 2.)
These have a 13-week determination period, reflecting their greater complexity and the need for more extensive consultation.
Applications Requiring Environmental Impact Assessment: 16 Weeks
Where an Environmental Impact Assessment (EIA) is required, the determination period extends to 16 weeks (EIA Regulations 2017 reg 68(2)). These are typically large-scale developments with significant environmental implications.
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The Real Timeline: What Actually Happens
While statutory timescales provide a framework, the actual timeline often looks quite different. Here's a realistic breakdown of what to expect.
Pre-Application Stage: 2-8 Weeks
Before you even submit your application, it's worth engaging with the council through their pre-application advice service. Each council sets its own charges, which vary with the scale of the proposal, so check your council's pre-application charging schedule.
Pre-application advice can:
- Identify potential issues early
- Suggest design changes that improve your chances
- Clarify which documents you'll need
- Save weeks or months of delays later
Most councils respond to pre-application enquiries within 4-6 weeks, though some take longer. Pre-application advice fees are part of the overall cost of getting planning permission — see How Much Does Planning Permission Cost? for a full breakdown including drawings, surveys, and professional fees.
Preparing Your Application: 1-4 Weeks
Gathering all the necessary documents takes time. A typical householder application needs:
- Completed application forms
- Site location plan (1:1250 or 1:2500)
- Block plan (1:200 or 1:500)
- Existing and proposed floor plans and elevations
- Design and Access Statement (for some applications)
- Planning fee
More complex applications may also require heritage statements, flood risk assessments, ecology surveys, transport assessments, and tree surveys.
Validation: 1-2 Weeks
Once submitted, the council checks your application is complete. If anything is missing, they'll send a validation letter requesting additional information. This can add 1-2 weeks to the process.
Consultation Period: 21 Days (Minimum)
The council must consult neighbours, parish councils, and statutory consultees. The minimum consultation period is 21 days, though councils often allow longer for complex applications.
During this period:
- Letters are sent to neighbouring properties
- A site notice may be posted
- The application appears on the council's public register
- Statutory consultees (highways, environment agency, etc.) are contacted
This is the window in which neighbours can submit objections to a planning application. Well-evidenced objections can add time to the process if the officer needs to seek amended plans or if the application is referred to committee.
Officer Assessment: 2-6 Weeks
A planning officer reviews your application against local and national planning policies. They consider:
- The development plan
- National Planning Policy Framework (NPPF)
- Material planning considerations
- Consultation responses
- Any objections received
Decision: Committee or Delegated
Most applications are decided by officers under delegated powers. This is generally faster. Applications that go to a planning committee can face additional delays of 2-6 weeks, as they must be scheduled for the next available committee meeting.
How long councils actually take varies a lot by area: our planning postcode lottery 2026 data study ranks the slowest and fastest councils by median days to a decision.
What Causes Delays?
Understanding common delay factors helps you avoid them.
Incomplete Applications
The single biggest cause of delay is submitting an application that isn't complete. Missing drawings, incorrect fees, or absent supporting documents all trigger requests for further information, adding weeks to the process.
Requests for Additional Information
Even after validation, officers may request additional information. Common requests include:
- Amended plans
- Additional surveys (bat surveys, contamination reports)
- Further design justification
- Revised documents addressing consultee concerns
Each request typically adds 2-4 weeks to the timeline.
Extensions of Time
When a council can't meet the statutory deadline, they may ask you to agree to an extension of time. This is a formal agreement, in writing, to extend the determination period (DMPO art 34(2)(c)). While you can refuse, doing so may result in the council rushing to refuse rather than taking time to find an acceptable solution. Agreeing also means the Planning Guarantee fee refund no longer applies to that application (Fees Regs reg 9A(2)(a)), and that you cannot appeal for non-determination until the extended period ends.
Planning Performance Agreements (PPAs)
For major developments, councils often use Planning Performance Agreements. These set out a bespoke timetable for determining the application, often extending well beyond the standard 13 weeks. PPAs can set timelines of 6-12 months for very large schemes.
Committee Delays
Until 31 October 2026 each council's own scheme of delegation decides which applications go to committee (some use councillor call-in or an objection threshold). From 31 October 2026, householder, minor commercial and minor residential applications must be decided by officers (except retrospective applications, applications connected with listed building consent, and the council's own applications), and other applications go to committee only if the council's nominated member (a councillor) and nominated officer agree to refer them (SI 2026/854, regs 4–6 and Schedules 1–2); this does not apply where the planning authority is a National Park authority or the Broads Authority (TCPA 1990 s319ZZF(1)). An application that goes to committee must wait for the next meeting. Committees typically meet monthly, so this can add 2-6 weeks.
Section 106 Negotiations
For major developments requiring a Section 106 agreement (developer contributions for infrastructure, affordable housing, etc.), negotiations can add months to the process. It's not uncommon for S106 negotiations to take 3-6 months after the committee resolution to approve.
How to Speed Things Up
1. Use Pre-Application Advice
Investing in pre-application advice almost always saves time in the long run. Officers can flag issues before you spend money on detailed drawings.
2. Submit a Complete Application
Double-check every document before submission. Use the council's validation checklist (available on their website) to ensure nothing is missing.
3. Hire a Professional
A planning consultant or experienced architect knows what councils expect. Their fees are often offset by faster decisions and fewer amendments.
4. Respond Quickly to Requests
If the council asks for additional information, respond as quickly as possible. Every day of delay at your end is a day added to the overall timeline.
5. Engage with Neighbours Early
Speaking to your neighbours before you submit can prevent objections. Addressing concerns upfront is always faster than dealing with them through the formal process.
6. Consider Permitted Development
Some works don't need planning permission at all. Check whether your project falls within permitted development rights — this can eliminate the application process entirely.
What If the Council Takes Too Long?
If the council fails to determine your application within the statutory period (and you haven't agreed to an extension of time), you have the right to appeal to the Planning Inspectorate on the grounds of non-determination.
You must make a non-determination appeal within 6 months of the end of the period the council had to decide, even for a householder application (PINS procedural guide, para 4.1). Non-determination appeals follow the Part 2 written procedure (or a hearing or inquiry), so you submit a full appeal statement (para 9.1.5). An independent inspector will decide the case. However, appeals take time themselves: s78 planning appeals decided by written representations in June 2026 took a median of 17.1 weeks from valid appeal to decision, and planning hearings and inquiries a median of 22.4 and 28.7 weeks over the 12 months to June 2026 (PINS statistical release 30 July 2026).
In practice, most applicants prefer to work with the council to reach a positive decision rather than appeal. Planning timescales also vary by council — some authorities consistently outperform the national average while others face resource pressures. Check planning performance for your area, such as Manchester or Birmingham, via their planning portals or the MHCLG planning application statistics.
Timelines by Application Type: Quick Reference
| Application Type | Statutory Period | Typical Real Time |
|---|---|---|
| Householder (extension, etc.) | 8 weeks | 8-12 weeks |
| Minor development | 8 weeks | 8-14 weeks |
| Major development | 13 weeks | 16-26 weeks |
| Major with EIA | 16 weeks | 20-40 weeks |
| Major with S106 | 13 weeks + S106 | 6-18 months |
| Listed building consent | 8 weeks | 8-14 weeks |
| Advertisement consent | 8 weeks | 6-10 weeks |
| Lawful development certificate | 8 weeks | 8-12 weeks |
Note: These are typical ranges. Individual cases vary significantly.
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Frequently Asked Questions
Can I start building before planning permission is granted?
No — starting work before receiving planning permission is a criminal offence in some cases and can result in enforcement action. The only exception is if your works fall within permitted development rights and don't require planning permission.
What happens if my planning application is taking too long?
Contact your planning officer to ask about progress. If the statutory period has passed and you haven't agreed an extension of time, you can appeal to the Planning Inspectorate on grounds of non-determination.
Does the 8-week clock include weekends and bank holidays?
Yes, the statutory period is 8 calendar weeks (56 days), including weekends and bank holidays. The clock starts on the day after the council receives a valid application, meaning the complete set of required documents and the fee (DMPO art 34). If your first submission was incomplete, that is later than the day you first sent it.
Can I pay extra for faster planning permission?
Some councils offer a fast-track service for an additional fee, though this is not universally available. You may read that the Planning Guarantee means no application should take longer than 26 weeks, and that this is poorly enforced. In fact it is a refund rule: the council must refund your application fee if it has not decided a valid non-major application within 16 weeks, or any other application within 26 weeks, unless you agreed a longer period in writing, the application was called in, or you appealed for non-determination first (Fees Regs 2012 reg 9A). The 16-week rule applies to non-major applications submitted on or after 6 December 2023 (GOV.UK fees guidance, para 042).
How long does planning permission last once granted?
Standard planning permission lasts 3 years from the date of the decision (TCPA 1990 s91). You must begin the development within this period, or the permission expires and you'll need to apply again.
Will your application actually be approved?
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