Planning decisions in Hertsmere
As of 30 Jun 2026, covering the last 5 years.
On the public planning record, Hertsmere approved 84% of 1,161 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 : 83% approved (281 decided, ~56 days)
- Rear extension : 84% approved (240 decided, ~56 days)
- Roof / fenestration : 90% approved (206 decided, ~57 days)
- Loft conversion : 90% approved (136 decided, ~56 days)
- Demolition : 81% approved (83 decided, ~64 days)
- Two-storey extension : 73% approved (60 decided, ~63 days)
- Side extension : 82% approved (55 decided, ~64 days)
- Porch : 84% approved (51 decided, ~62 days)
- Tree work : 69% approved (49 decided, ~53 days)
Method
Figures are aggregates over the public planning decisions we hold for Hertsmere, 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.