Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 2,671 real decisions tell us about rear extension outcomes in Slough.
See your ward's approval rate and nearby planning decisions — free and instant.
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 | Farnham | 6 | 6 | 100.0% |
| 2 | Langley Meads | 8 | 7 | 87.5% |
| 3 | Langley Marish | 7 | 6 | 85.7% |
| 4 | Langley St. Marys | 5 | 4 | 80.0% |
| 5 | Cippenham Green | 5 | 4 | 80.0% |
| 6 | Manor Park & Stoke | 5 | 4 | 80.0% |
| 7 | Unknown | 6 | 4 | 66.7% |
| 8 | Baylis & Salt Hill | 5 | 3 | 60.0% |
| 9 | Upton | 5 | 3 | 60.0% |
A rear extension has a 100.0% approval rate in Farnham but just 60.0% in Upton.
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 Slough.
| Type | Decisions | Rate |
|---|---|---|
| Conservatory | 46 | 91.3% |
| Wraparound Extension | 392 | 87.5% |
| Loft Conversion | 590 | 86.9% |
| Side Extension | 1,026 | 86.4% |
| Outbuilding | 590 | 85.3% |
| Dormer | 395 | 84.3% |
| Rear Extension | 2,671 | 84.3% |
| Garage / Parking | 503 | 82.9% |
| Front Extension | 326 | 82.2% |
| Hip-to-Gable Conversion | 214 | 82.2% |
| Extension (General) | 122 | 75.4% |
| New Build | 36 | 69.4% |
| Change of Use (Residential) | 286 | 66.8% |
| HMO | 34 | 44.1% |
420 rear extension applications in Slough have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A £79 report shows you what gets approved — and what gets refused — near your property.
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