Two-storey extension planning approval in Three Rivers
Based on decisions in the last 5 years, as of 25 Jun 2026.
Of 98 two-storey extension planning applications decided by Three Rivers in the last 5 years, 88% 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 Three Rivers
- Extension : 92% approved (431 decided)
- Rear extension : 92% approved (346 decided)
- Roof / fenestration : 92% approved (238 decided)
- Demolition : 93% approved (204 decided)
- Loft conversion : 88% approved (154 decided)
- Side extension : 92% approved (91 decided)
- Porch : 92% approved (74 decided)
- Outbuilding / garden room : 93% approved (71 decided)
Method
Approval rate = approved ÷ (approved + refused) over the public planning decisions we hold for Three Rivers, matched to a type of work from the application description. We lead with the last few years so the figure reflects how Three Rivers 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.