Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,182 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 | Lindfield | 5 | 5 | 100.0% |
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 Mid Sussex.
| Type | Decisions | Rate |
|---|---|---|
| Conservatory | 321 | 96.9% |
| Front Extension | 220 | 96.4% |
| Rear Extension | 1,182 | 95.9% |
| Side Extension | 676 | 95.3% |
| Wraparound Extension | 85 | 95.3% |
| Outbuilding | 400 | 94.5% |
| Loft Conversion | 329 | 93.3% |
| Basement | 28 | 92.9% |
| Hip-to-Gable Conversion | 67 | 92.5% |
| Extension (General) | 505 | 92.3% |
| Garage / Parking | 1,307 | 92.2% |
| Dormer | 460 | 92.2% |
| Change of Use (Residential) | 236 | 89.4% |
| Annex | 62 | 85.5% |
| New Build | 161 | 75.8% |
48 rear extension applications in Mid Sussex 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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