Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 7,190 real decisions tell us about rear extension outcomes in Sutton.
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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 | Carshalton Central | 9 | 9 | 100.0% |
| 2 | Sutton West & East Cheam | 6 | 6 | 100.0% |
| 3 | Belmont | 10 | 10 | 100.0% |
| 4 | Carshalton South & Clockhouse | 13 | 12 | 92.3% |
| 5 | Worcester Park South | 8 | 7 | 87.5% |
| 6 | St Helier West | 7 | 6 | 85.7% |
| 7 | Cheam | 7 | 6 | 85.7% |
| 8 | St Helier East | 6 | 5 | 83.3% |
| 9 | Beddington | 8 | 6 | 75.0% |
| 10 | Stonecot | 5 | 3 | 60.0% |
A rear extension has a 100.0% approval rate in Carshalton Central but just 60.0% in Stonecot.
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Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Sutton.
| Type | Decisions | Rate |
|---|---|---|
| Flat Conversion | 916 | 91.6% |
| Extension (General) | 2,202 | 89.1% |
| Basement | 234 | 84.6% |
| Conservatory | 416 | 84.4% |
| Dormer | 3,128 | 83.0% |
| Garage / Parking | 4,117 | 82.9% |
| Hip-to-Gable Conversion | 430 | 82.6% |
| Change of Use (Residential) | 966 | 82.0% |
| Outbuilding | 846 | 81.9% |
| Rear Extension | 7,190 | 80.0% |
| Wraparound Extension | 1,079 | 79.4% |
| Side Extension | 3,038 | 79.2% |
| Loft Conversion | 148 | 79.1% |
| New Build | 1,059 | 78.1% |
| Front Extension | 939 | 77.6% |
| HMO | 185 | 75.7% |
| Annex | 154 | 73.4% |
1,439 rear extension applications in Sutton 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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