Planning decisions in Hillingdon
As of 16 Jun 2026, covering the last 5 years.
On the public planning record, Hillingdon approved 81% of 10,148 decided applications in the last 5 years. Here is the approval rate for the most common home-project types. It is useful before you apply and free for local reporters to cite with attribution to MyTrustedTraders.
Approval rate by project type
- Extension : 81% approved (2,340 decided, ~56 days)
- Rear extension : 82% approved (1,666 decided, ~56 days)
- Roof / fenestration : 84% approved (1,090 decided, ~56 days)
- Demolition : 81% approved (882 decided, ~61 days)
- Loft conversion : 82% approved (812 decided, ~56 days)
- Outbuilding / garden room : 83% approved (506 decided, ~56 days)
- Side extension : 75% approved (493 decided, ~59 days)
- Two-storey extension : 69% approved (452 decided, ~61 days)
- Porch : 77% approved (356 decided, ~57 days)
- Tree work : 77% approved (279 decided, ~58 days)
- Change of use : 64% approved (189 decided, ~69 days)
- Conservatory / orangery : 81% approved (181 decided, ~56 days)
- Balcony / roof terrace : 88% approved (165 decided, ~56 days)
- New dwelling : 83% approved (145 decided, ~86 days)
- Driveway / dropped kerb : 81% approved (130 decided, ~72 days)
- Boundary wall / fence / gates : 72% approved (109 decided, ~72 days)
- Advertisement / signage : 82% approved (94 decided, ~67 days)
- Basement : 93% approved (55 decided, ~76 days)
- Shopfront / commercial : 87% approved (54 decided, ~63 days)
- Listed building / conservation : 86% approved (51 decided, ~66 days)
- Solar / renewables : 85% approved (48 decided, ~56 days)
- Windows & doors : 94% approved (36 decided, ~66 days)
- Annexe : 40% approved (15 decided, ~69 days)
Method
Figures are aggregates over the public planning decisions we hold for Hillingdon, matched to a project type from the application description. Overall approval is decided-weighted across project types, using each type's rate over the last 5 years where we hold enough decisions, otherwise its full record. Only types with at least five decided applications are shown. We publish aggregate counts only, with no application references or applicant names. Full method and limits.