Extension planning approval in Belfast
Based on decisions in the last 5 years, as of 24 Jun 2026.
Of 526 extension planning applications decided by Belfast in the last 5 years, 99% 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 Belfast
- Rear extension : 100% approved (340 decided)
- Demolition : 99% approved (210 decided)
- Roof / fenestration : 100% approved (129 decided)
- Change of use : 94% approved (95 decided)
- Side extension : 100% approved (122 decided)
- Two-storey extension : 100% approved (83 decided)
- Advertisement / signage : 99% approved (84 decided)
- Loft conversion : 100% approved (88 decided)
Method
Approval rate = approved ÷ (approved + refused) over the public planning decisions we hold for Belfast, matched to a type of work from the application description. We lead with the last few years so the figure reflects how Belfast 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.