Planning decisions in Lisburn and Castlereagh
As of 30 Jun 2026, covering the last 5 years.
On the public planning record, Lisburn and Castlereagh approved 98% of 1,057 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 : 98% approved (505 decided, ~103 days)
- Rear extension : 100% approved (143 decided, ~98 days) †
- Side extension : 99% approved (75 decided, ~105 days)
- Demolition : 99% approved (74 decided, ~177 days)
- Two-storey extension : 98% approved (63 decided, ~131 days)
- Loft conversion : 98% approved (58 decided, ~104 days)
- New dwelling : 90% approved (41 decided, ~242 days)
- Change of use : 95% approved (37 decided, ~243 days)
- Advertisement / signage : 94% approved (32 decided, ~165 days)
- Boundary wall / fence / gates : 100% approved (29 decided, ~137 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 Lisburn and Castlereagh, 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.