You have a builder who can start in the autumn, a kitchen priced while the sale is on, and one question nobody will answer straight: how long does planning permission actually take? The official line, printed on council websites and repeated in every guide, is eight weeks. The records councils publish do not back that up.
We analysed 1.3 million planning applications published by more than 400 UK planning authorities, including 942,498 decided applications with usable dates. For a full application, the kind most home projects need, the typical wait from appearing in the council's records to a published decision is 62 days. That is nine weeks. And of the full applications that got a decision, only 40.9% got it within the eight week target. The eight week figure is not a forecast. It is a coin flip you will probably lose.
Nine weeks is the middle of the road, not the worst case
A median of 62 days means half of decided full applications took longer than that. One in ten took more than 146 days, which is about 21 weeks. One in twenty took more than 206 days. If your application lands in that slow tail, you will not be a week late. You will be re-booking trades for a different season. The sensible way to plan is a range: nine weeks if things go smoothly, five months if they do not.
The recent picture is no kinder. Looking only at full applications decided in the last five years, the typical wait is 65 days, and the share of decisions made within eight weeks is 36.8%.
The most common day to get a decision is the deadline itself
Here is the detail that explains how planning departments really work. Across every application type in our data, 86,161 decisions were published exactly 56 days after the application appeared in the record. Day 55 saw 36,547 decisions. Day 57 saw 20,496. Day 56 is the eight week mark, and it towers over every other day on the calendar. There is nothing sinister in that. Planning officers work to a statutory clock, files get lined up against their deadlines, and a large share of decisions are signed off on the day the clock asks for. The target does less to speed decisions up than it does to set the day they arrive.
If you have read a council's own performance figures, you may have seen claims that the great majority of applications were decided on time, and wondered how that squares with what you just read. Both are true. Councils are allowed to count an application as on time when a deadline extension was agreed with the applicant, and extensions are common. We measure something plainer: calendar days from the date an application first appears as received or validated in the public record to the date a decision is published. That is the wait you actually live through while the scaffolding quote expires.
What you are applying for changes the clock
Not everything called a planning application runs at the same speed, and the statutory targets differ too: eight weeks for minor applications in England and Wales, thirteen weeks for major ones. Among the decisions in our data, the typical waits by application type look like this:
- Full applications, the standard route for extensions and most home projects: 62 days typical, and of those decided, 40.9% within eight weeks (436,555 decisions)
- Outline applications, which test the principle of a development: 46 days typical (134,106 decisions)
- Discharge of planning conditions on an approval you already hold: 56 days typical (117,856 decisions)
- Tree works: 41 days typical, the quickest common type (105,567 decisions)
- Amendments to an already approved scheme: 48 days typical (48,331 decisions)
- Listed building and heritage consents: 66 days typical, the slowest common type (31,835 decisions)
Where you live can move the wait by two months
The national numbers hide the part that matters to you: councils differ enormously. We looked at the 171 English councils with at least 500 full application decisions in the last five years, using the same rolling five year window as our council pages. The shortest typical wait in the records councils publish is 48 days. The longest is 112. Same country, same kind of application, and a gap of more than two months in the middle of your build calendar.
The shortest typical waits in the published records over the last five years:
- Castle Point: 48 days (533 decided full applications)
- Ashfield: 51 days (668)
- Rushmoor: 53 days (1,198)
- Epsom and Ewell: 53 days (684)
- Stevenage: 54 days (1,049)
And the longest:
- East Staffordshire: 112 days (557 decided full applications)
- Walsall: 105 days (1,018)
- Hartlepool: 103 days (745)
- Wakefield: 95 days (1,379)
- Calderdale: 91 days (593)
Treat these as typical waits in each council's published decisions, not a ranking of good and bad planning departments. Councils decide different mixes of cases with different resources, and a long typical wait is usually a workload story, not a competence one. What the spread tells you is simpler: before you promise a start date to anyone, look up what your own council does, not what the national guidance says it should do. Our council pages carry each authority's own decision times and approval rates, and our planning finder shows you recent architect-designed applications near you.
Scotland and Northern Ireland run different clocks. Wales runs slower on the same one
The eight week target belongs to England and Wales. Scotland works to two months for local applications: the typical decided full application there took 65 days, with 44.2% of decisions inside the two month mark (23,200 decisions). Wales shares the English target but ran slower in the published records, at a 68 day typical wait (14,492 decisions). Northern Ireland gives local applications fifteen weeks: the typical wait there was 102 days, with about half of decisions (52%) arriving inside the target (7,968 decisions). Comparing a Belfast wait to a Bristol one is comparing different rulebooks, so we have kept them apart.
How to plan around the real timeline
First, plan your build against nine weeks as the base case and keep the five month tail in mind before signing anything that penalises delay. Second, protect the start of the clock: the wait we measured begins when your application appears in the council's records, so an application that bounces for missing drawings or an unpaid fee has not even started. Getting validation right first time is the cheapest week you will ever save. Third, when the eight week mark passes quietly, do not panic. As the day 56 spike shows, enormous numbers of decisions arrive at or just after the deadline, and week nine is the single most common week to be decided. Chase politely, ask whether an extension of time has been logged, and keep your builder in the loop.
And the question everyone asks: does hiring an architect or planning agent make the decision come faster? In our data, no. Applications filed through a professional take about as long and are approved at about the same rate as applications filed directly, largely because professionals take on the harder schemes. What a good professional changes is what enters the queue in the first place: a scheme shaped to your council's known appetite, submitted so it validates first time. If you use one, pick one with a real track record in your council rather than a beautiful portfolio from somewhere else. That is exactly what our council experience tool is for, and for Londoners our earlier deep dive covers approval odds borough by borough.
How long does planning permission take in the UK?
Of the 436,555 decided full planning applications we analysed from UK councils' published records, the typical wait was 62 days, about nine weeks, and only 40.9% of decisions arrived within the official eight week target. One in ten decisions took more than 146 days. Counting every application type together, from tree works to condition discharges, the typical wait was 56 days. Among the English councils with enough recent decisions to measure, typical waits range from 48 days to 112, so your local picture matters more than the national one.
Is the eight week target a legal deadline?
It is the statutory determination period for minor applications in England and Wales, thirteen weeks for major ones, but missing it does not invalidate your application. Councils routinely agree extensions of time with applicants, and their official statistics count extended cases as decided on time. In England, if no decision has arrived after 26 weeks and no extension was agreed, you are entitled to your application fee back. In practice the clock still disciplines the system: the single most common day to receive a decision in our data is day 56, the deadline itself, with 86,161 decisions landing on exactly that day.
What can I do if my planning application is taking too long?
First check your council's typical decision time, because what feels slow may be normal there. Week nine is the single most common week for a decision, so a quiet week eight is not a bad sign. If you are well past your council's typical wait, contact the case officer, ask whether an extension of time has been agreed, and answer any outstanding consultation points quickly. For long delays you have a formal right to appeal against non-determination, though most people get a decision sooner by staying engaged than by starting an appeal.
How long does planning permission take in Scotland and Northern Ireland?
They run separate systems with their own clocks. In Scotland, where the target for local applications is two months, the typical decided full application in the records we hold took 65 days, and 44.2% of decisions arrived within two months. In Northern Ireland, where local applications get fifteen weeks, the typical wait was 102 days, and about half of decisions arrived within the target. Neither should be measured against England's eight week rule.
Does hiring an architect make planning permission faster?
Not in the published record. Applications filed through a professional agent take about as long and succeed at about the same rate as those filed directly, mostly because professionals handle the more complex schemes. Where a good architect or agent earns their fee is before the clock starts: a design your council is likely to accept, an application that validates first time, and fewer avoidable objections along the way. Choose one with recent experience in your specific council.
Why do so many planning decisions land exactly on day 56?
Because planning departments manage their caseloads against the statutory clock. Day 56 is the eight week mark for minor applications in England and Wales, and officers work files so that decisions are issued by the date the law asks for. In our data 86,161 decisions were published on exactly day 56, more than double the day before and four times the day after. It is the system working to its deadline, not a trick.
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