Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 7,156 real decisions tell us about rear extension outcomes in Slough.
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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 | Manor Park & Stoke | 7 | 7 | 100.0% |
| 2 | Upton Lea | 7 | 7 | 100.0% |
| 3 | Upton | 5 | 5 | 100.0% |
| 4 | Cippenham Manor | 8 | 7 | 87.5% |
| 5 | Farnham | 7 | 6 | 85.7% |
| 6 | Langley Meads | 6 | 5 | 83.3% |
| 7 | Langley St. Marys | 5 | 3 | 60.0% |
| 8 | Cippenham Green | 5 | 3 | 60.0% |
| 9 | Haymill | 5 | 3 | 60.0% |
| 10 | Britwell | 5 | 2 | 40.0% |
A rear extension has a 100.0% approval rate in Manor Park & Stoke but just 40.0% in Britwell.
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Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Slough.
| Type | Decisions | Rate |
|---|---|---|
| Loft Conversion | 1,158 | 87.5% |
| Conservatory | 177 | 85.9% |
| Wraparound Extension | 920 | 85.7% |
| Dormer | 869 | 85.7% |
| Garage / Parking | 1,264 | 84.0% |
| Rear Extension | 7,156 | 83.7% |
| Hip-to-Gable Conversion | 358 | 83.2% |
| Side Extension | 2,806 | 82.5% |
| Outbuilding | 1,251 | 82.3% |
| Extension (General) | 328 | 81.4% |
| Annex | 28 | 78.6% |
| Change of Use (Residential) | 768 | 78.4% |
| Flat Conversion | 23 | 78.3% |
| Front Extension | 660 | 74.4% |
| New Build | 245 | 71.4% |
| HMO | 57 | 47.4% |
1,170 rear extension applications in Slough 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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