Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,409 real decisions tell us about rear extension outcomes in Surrey Heath.
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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.
Two houses on the same street can get different outcomes.
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Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Surrey Heath.
| Type | Decisions | Rate |
|---|---|---|
| HMO | 29 | 100.0% |
| Basement | 28 | 96.4% |
| Conservatory | 393 | 90.3% |
| Wraparound Extension | 202 | 89.6% |
| Rear Extension | 1,409 | 88.9% |
| Side Extension | 1,074 | 88.4% |
| Garage / Parking | 1,078 | 88.1% |
| Front Extension | 445 | 87.6% |
| Outbuilding | 209 | 87.1% |
| Extension (General) | 194 | 87.1% |
| Annex | 37 | 86.5% |
| Change of Use (Residential) | 179 | 85.5% |
| New Build | 364 | 83.0% |
| Dormer | 256 | 80.5% |
| Loft Conversion | 56 | 80.4% |
156 rear extension applications in Surrey Heath 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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