Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 440 real decisions tell us about rear extension outcomes in Three Rivers.
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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 | Moor Park And Eastbury | 5 | 5 | 100.0% |
| 2 | Oxhey Hall And Hayling | 8 | 8 | 100.0% |
| 3 | Penn And Mill End | 6 | 6 | 100.0% |
| 4 | Durrants | 11 | 10 | 90.9% |
| 5 | Chorleywood North And Sarratt | 7 | 6 | 85.7% |
| 6 | Carpenders Park | 14 | 9 | 64.3% |
A rear extension has a 100.0% approval rate in Moor Park And Eastbury but just 64.3% in Carpenders Park.
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 Three Rivers.
| Type | Decisions | Rate |
|---|---|---|
| Hip-to-Gable Conversion | 48 | 100.0% |
| Loft Conversion | 105 | 98.1% |
| Conservatory | 26 | 96.2% |
| Front Extension | 26 | 96.2% |
| Garage / Parking | 180 | 94.4% |
| Outbuilding | 84 | 94.0% |
| Dormer | 140 | 93.6% |
| Side Extension | 56 | 92.9% |
| Rear Extension | 440 | 92.5% |
| Extension (General) | 34 | 88.2% |
33 rear extension applications in Three Rivers 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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