Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 118 real decisions tell us about rear extension outcomes in Chelmsford.
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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 | Unknown | 64 | 54 | 84.4% |
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 Chelmsford.
| Type | Decisions | Rate |
|---|---|---|
| Front Extension | 29 | 96.6% |
| Conservatory | 25 | 96.0% |
| New Build | 20 | 90.0% |
| Dormer | 37 | 89.2% |
| Outbuilding | 37 | 89.2% |
| Extension (General) | 23 | 87.0% |
| Rear Extension | 118 | 86.4% |
| Garage / Parking | 96 | 85.4% |
| Side Extension | 79 | 83.5% |
| Change of Use (Residential) | 26 | 69.2% |
16 rear extension applications in Chelmsford 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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