Planning decisions in Welwyn Hatfield
As of 30 Jun 2026, covering the last 5 years.
On the public planning record, Welwyn Hatfield approved 89% of 1,360 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 : 87% approved (339 decided, ~60 days)
- Rear extension : 87% approved (265 decided, ~61 days)
- Tree work : 99% approved (175 decided, ~56 days)
- Roof / fenestration : 89% approved (130 decided, ~59 days)
- Demolition : 89% approved (100 decided, ~62 days)
- Side extension : 86% approved (86 decided, ~66 days)
- Two-storey extension : 79% approved (70 decided, ~62 days)
- Loft conversion : 90% approved (68 decided, ~60 days)
- Conservatory / orangery : 91% approved (45 decided, ~63 days)
- Boundary wall / fence / gates : 83% approved (41 decided, ~75 days)
- Porch : 93% approved (41 decided, ~69 days)
Method
Figures are aggregates over the public planning decisions we hold for Welwyn Hatfield, 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.