Extension planning approval in Conwy
Based on decisions in the last 5 years, as of 3 Jul 2026.
Of 330 extension planning applications decided by Conwy in the last 5 years, 90% 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 Conwy
- Change of use : 80% approved (147 decided)
- Demolition : 91% approved (143 decided)
- Listed building / conservation : 94% approved (90 decided)
- Rear extension : 92% approved (89 decided)
- New dwelling : 82% approved (62 decided)
- Tree work : 96% approved (56 decided)
- Outbuilding / garden room : 96% approved (52 decided)
- Solar / renewables : 94% approved (49 decided)
Method
Approval rate = approved ÷ (approved + refused) over the public planning decisions we hold for Conwy, matched to a type of work from the application description. We lead with the last few years so the figure reflects how Conwy 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.