Extension planning approval in St Helens
Based on decisions in the last 5 years, as of 22 Jun 2026.
Of 480 extension planning applications decided by St Helens in the last 5 years, 96% 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 St Helens
- Rear extension : 98% approved (326 decided)
- Side extension : 95% approved (159 decided)
- Demolition : 98% approved (123 decided)
- Change of use : 87% approved (78 decided)
- Two-storey extension : 97% approved (75 decided)
- Conservatory / orangery : 97% approved (59 decided)
- Tree work : 89% approved (55 decided)
- Porch : 96% approved (51 decided)
Method
Approval rate = approved ÷ (approved + refused) over the public planning decisions we hold for St Helens, matched to a type of work from the application description. We lead with the last few years so the figure reflects how St Helens 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.