UK planning decision speed and the likelihood of approval are statistically independent dimensions: a council that decides quickly is not more likely to approve, and a permissive council is not faster to decide. LeadLinka Research analysis of more than 250 UK local planning authorities finds councils distributed across all four quadrants of the speed-approval matrix. The fastest council (Redbridge, 6.6 weeks) has one of the lowest approval rates (53.3%). The highest-approving council in the dataset (City of London, 93.8%) is the slowest to decide (19.1 weeks). A developer who optimises on one dimension is ignoring the other entirely.
The conventional assumption about planning authorities is that a fast-deciding council is also an efficient, development-friendly one, and therefore more likely to approve. The data does not support that assumption. When LeadLinka Research plots decision speed against approval rate across more than 250 UK local planning authorities, the two measures are independent: knowing a council's average decision time gives you little information about its approval rate, and vice versa.
The national figures provide the baseline: around 10.1 weeks average decision time and approximately 75% approval rate, according to LeadLinka Research. Above and below those thresholds, councils distribute across all four possible combinations. There is no meaningful correlation between the two dimensions in this dataset.
This is not an obvious result. It runs counter to the intuition that "difficult" councils are difficult on both measures simultaneously. The data shows that the two sources of friction, a slow process and a restrictive outcome, do not systematically co-occur in the same authority.
Setting speed and approval together produces four distinct council profiles. All four quadrants are populated, according to LeadLinka Research, though not evenly.
| Council | Decision time | Approval rate | Quadrant |
|---|---|---|---|
| Enfield | 7.7 wks | 84.1% | Fast and permissive |
| Redbridge | 6.6 wks | 53.3% | Fast but restrictive |
| Richmond upon Thames | 7.0 wks | 64.5% | Fast, below-average approval |
| Tower Hamlets | 13.4 wks | 88.4% | Slow but permissive |
| City of London | 19.1 wks | 93.8% | Slow but permissive |
| National average | 10.1 wks | ~75% | Reference |
Fast and permissive (low time, high approval). Enfield is the clearest example in this data: it decides in 7.7 weeks and approves 84.1% of applications, above the national average on both measures. This is the combination developers would most prefer, and it does exist, though it requires checking both dimensions to find it.
Fast but restrictive (low time, low approval). Redbridge is the extreme example: the fastest council in the dataset at 6.6 weeks, yet with an approval rate of 53.3%, well below the national average of around 75%. A developer optimising purely on speed, perhaps to accelerate a procurement timeline, would pick Redbridge and face the lowest approval odds in the analysis. The speed is real; so is the restriction.
Slow but permissive (high time, high approval). The City of London and Tower Hamlets both sit here. The City of London takes 19.1 weeks, the slowest in the dataset, but approves 93.8% of applications. Tower Hamlets takes 13.4 weeks and approves 88.4%. For a scheme where approval probability matters more than timeline, these authorities are favourable on the dimension that counts, despite the slower process.
Slow and restrictive (high time, low approval). This is the quadrant developers fear most: a long wait and a poor outcome. It is also the hardest to populate from the data. Among the councils measured, the slowest authorities tend to be the most permissive. The combination of friction on both dimensions simultaneously does not appear to be common. That does not mean it does not exist, but it is not the modal pattern for the slower end of the dataset.
Planning authority league tables that rank on speed alone, or approval rate alone, are structurally incomplete because they treat as a single question what is actually two independent ones. A "fastest councils" list puts Redbridge at the top; a "most permissive councils" list puts it near the bottom. Neither list is wrong on its own terms, but each is misleading if treated as a proxy for the other.
The practical consequence is that a developer using a single-metric ranking to select a council for a scheme is implicitly assuming the two measures are correlated. They are not. The correct question is: which dimension matters more for this specific scheme? A scheme where timing determines financing or procurement windows needs to optimise on speed. A scheme where the application is marginal on its planning merits needs to optimise on approval probability. And a scheme that is both time-critical and approval-marginal needs to identify the authorities that appear in the fast and permissive quadrant, which requires looking at both measures simultaneously.
For developers, the two-dimensional picture changes where a scheme is worth placing and how risk is assessed. For M&E contractors and equipment suppliers, the planning stage is the leading indicator of when a procurement window opens (speed) and whether it opens at all (approval). A combined view of the local planning authority is more actionable than either metric alone.
For a high-volume pipeline where the goal is throughput, speed matters most: faster councils mean faster determination, faster approval, and faster entry into the construction pipeline. For a lower-volume pipeline with marginal schemes, the approval rate matters more: a scheme that is borderline on its merits is better placed with an authority whose baseline is more permissive.
LeadLinka Research tracks both dimensions at council level continuously, so the full picture is available for the specific authorities relevant to any given project or geography. The data in this article covers councils with sufficient application volumes for reliable estimates; the full dataset includes more than 250 UK local planning authorities.
LeadLinka Research tracks planning applications across more than 250 UK local planning authorities. Approval rate is the share of decided applications that were approved in Q2 2026 for councils with at least 30 decided applications in the period. Decision time is the mean number of weeks from validation date to decision date over the most recent 12 months, for councils with at least 50 decided applications in the window. The two measures use slightly different sample windows and volume thresholds; they are presented as council profiles, not a single composite score. The independence finding is observational: this dataset shows no meaningful positive correlation between speed and approval rate at council level, but this does not imply a structural mechanism. One authority is excluded due to a known duplicate-record data-quality issue.
Full methodology: leadlinka.co.uk/methodology.
Source: LeadLinka Research, "Fast or Lenient? UK Planning Speed and Approval Rate Are Independent Dimensions", leadlinka.co.uk/insights/uk-council-planning-speed-vs-approval-2026, published 23 June 2026, updated 25 June 2026. Methodology and definitions: leadlinka.co.uk/methodology.
Source: LeadLinka planning applications database · more than 250 UK local planning authorities · Approval Q2 2026; decision times most recent 12 months · ← All Insights