Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 5,743 real decisions tell us about rear extension outcomes in Merton.
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Rear extensions sit in the middle of the pack nationally. They're common enough that councils have clear precedent — but that cuts both ways. If your neighbours have been refused, that precedent works against you too.
| # | Ward | Decisions | Approved | Rate |
|---|---|---|---|---|
| 1 | Cannon Hill | 10 | 10 | 100.0% |
| 2 | Village | 8 | 8 | 100.0% |
| 3 | Wimbledon Town And Dundonald | 11 | 9 | 81.8% |
| 4 | Merton Park | 8 | 6 | 75.0% |
A rear extension has a 100.0% approval rate in Cannon Hill but just 75.0% in Merton Park.
Check your postcode to see what actually happens near your address.
Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Merton.
| Type | Decisions | Rate |
|---|---|---|
| Conservatory | 296 | 92.9% |
| Basement | 589 | 91.3% |
| Loft Conversion | 3,891 | 89.9% |
| Garage / Parking | 2,149 | 88.7% |
| Wraparound Extension | 476 | 88.7% |
| Dormer | 2,399 | 88.5% |
| New Build | 1,242 | 87.8% |
| Extension (General) | 917 | 87.0% |
| Hip-to-Gable Conversion | 1,160 | 86.9% |
| Side Extension | 1,950 | 85.0% |
| Change of Use (Residential) | 1,160 | 83.7% |
| Outbuilding | 1,032 | 83.1% |
| Flat Conversion | 876 | 83.1% |
| Rear Extension | 5,743 | 81.7% |
| Annex | 104 | 79.8% |
| Front Extension | 232 | 78.9% |
| HMO | 179 | 55.3% |
1,051 rear extension applications in Merton have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A free, property-specific report shows you what gets approved — and what gets refused — near your property.
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