Extension planning approval in Glamorgan
Based on decisions in the last 5 years, as of 25 Jun 2026.
Of 387 extension planning applications decided by Glamorgan in the last 5 years, 92% were approved. This is the council's track record for this kind of work. It is a useful gauge before you apply, not a guarantee for any one application.
Other work in Glamorgan
- Rear extension : 96% approved (163 decided)
- Demolition : 94% approved (144 decided)
- Loft conversion : 93% approved (102 decided)
- Tree work : 98% approved (95 decided)
- Side extension : 89% approved (93 decided)
- Two-storey extension : 87% approved (92 decided)
- Change of use : 83% approved (82 decided)
- Balcony / roof terrace : 95% approved (73 decided)
Method
Approval rate = approved ÷ (approved + refused) over the public planning decisions we hold for Glamorgan, matched to a type of work from the application description. We lead with the last few years so the figure reflects how Glamorgan decides today, with the longer record as context. A rate is only shown once there are enough decided applications for it to be reliable. We publish aggregate figures only, never an individual application or applicant name. Read the full method and limits.