Planning decisions in Cardiff
As of 2 Jul 2026, covering the last 5 years.
On the public planning record, Cardiff approved 97% of 987 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 : 97% approved (325 decided, ~54 days)
- Rear extension : 97% approved (222 decided, ~55 days)
- Loft conversion : 94% approved (101 decided, ~54 days)
- Side extension : 96% approved (89 decided, ~53 days)
- Tree work : 100% approved (76 decided, ~9 days) †
- Demolition : 96% approved (68 decided, ~56 days)
- Change of use : 94% approved (65 decided, ~45 days)
- Two-storey extension : 98% approved (41 decided, ~60 days)
† We hold no refused decisions for this type here, so treat a full approval rate with caution. The council's own portal has the complete history.
Method
Figures are aggregates over the public planning decisions we hold for Cardiff, 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.
Planning a project in Cardiff?
14 architects with public evidence are listed for Cardiff. Their profiles show reviews, credentials and, where we hold it, real planning history.
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