Planning decisions in Merton
As of 15 Jan 2026, covering the last 5 years.
On the public planning record, Merton approved 87% of 11,413 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 : 86% approved (3,226 decided, ~56 days)
- Rear extension : 85% approved (2,059 decided, ~56 days)
- Loft conversion : 86% approved (935 decided, ~56 days)
- Roof / fenestration : 92% approved (874 decided, ~56 days)
- Demolition : 91% approved (803 decided, ~78 days)
- Side extension : 85% approved (522 decided, ~72 days)
- Outbuilding / garden room : 84% approved (362 decided, ~65 days)
- Two-storey extension : 77% approved (284 decided, ~77 days)
- Tree work : 98% approved (278 decided, ~42 days)
- New dwelling : 94% approved (247 decided, ~85 days)
- Boundary wall / fence / gates : 93% approved (246 decided, ~79 days)
- Change of use : 71% approved (234 decided, ~83 days)
- Basement : 94% approved (196 decided, ~85 days)
- Porch : 81% approved (177 decided, ~64 days)
- Driveway / dropped kerb : 87% approved (166 decided, ~81 days)
- Windows & doors : 92% approved (155 decided, ~64 days)
- Balcony / roof terrace : 87% approved (144 decided, ~64 days)
- Solar / renewables : 88% approved (97 decided, ~66 days)
- Advertisement / signage : 92% approved (91 decided, ~85 days)
- Shopfront / commercial : 85% approved (91 decided, ~83 days)
- Conservatory / orangery : 92% approved (85 decided, ~58 days)
- Listed building / conservation : 99% approved (80 decided, ~86 days)
- Annexe : 88% approved (32 decided, ~72 days)
- Swimming pool : 93% approved (29 decided, ~92 days)
Method
Figures are aggregates over the public planning decisions we hold for Merton, 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.