Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 185 real decisions tell us about rear extension outcomes in Southampton.
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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 | Bassett | 10 | 10 | 100.0% |
| 2 | Bitterne Park | 7 | 7 | 100.0% |
| 3 | Harefield | 6 | 6 | 100.0% |
| 4 | Peartree | 9 | 9 | 100.0% |
| 5 | Sholing | 11 | 11 | 100.0% |
| 6 | Swaythling | 12 | 12 | 100.0% |
| 7 | Shirley | 8 | 8 | 100.0% |
| 8 | Millbrook | 5 | 5 | 100.0% |
| 9 | Portswood | 7 | 6 | 85.7% |
A rear extension has a 100.0% approval rate in Bassett but just 85.7% in Portswood.
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 Southampton.
| Type | Decisions | Rate |
|---|---|---|
| Extension (General) | 33 | 100.0% |
| Rear Extension | 185 | 91.9% |
| Garage / Parking | 49 | 89.8% |
| Conservatory | 28 | 85.7% |
| New Build | 20 | 85.0% |
| Side Extension | 64 | 84.4% |
| Dormer | 32 | 81.2% |
15 rear extension applications in Southampton 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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