Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,282 real decisions tell us about rear extension outcomes in Mid Sussex.
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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 | Hassocks | 5 | 5 | 100.0% |
| 2 | Cuckfield, Bolney And Ansty | 5 | 3 | 60.0% |
| 3 | Lindfield | 6 | 3 | 50.0% |
A rear extension has a 100.0% approval rate in Hassocks but just 50.0% in Lindfield.
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Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Mid Sussex.
| Type | Decisions | Rate |
|---|---|---|
| Conservatory | 344 | 97.1% |
| Front Extension | 234 | 96.2% |
| Rear Extension | 1,282 | 95.5% |
| Side Extension | 734 | 95.1% |
| Wraparound Extension | 96 | 93.8% |
| Outbuilding | 442 | 93.4% |
| Loft Conversion | 357 | 93.3% |
| Basement | 29 | 93.1% |
| Extension (General) | 536 | 92.2% |
| Garage / Parking | 1,425 | 92.0% |
| Hip-to-Gable Conversion | 72 | 91.7% |
| Dormer | 494 | 91.5% |
| Change of Use (Residential) | 245 | 89.0% |
| Annex | 70 | 87.1% |
| New Build | 169 | 76.3% |
58 rear extension applications in Mid Sussex 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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