Not all planning applications are created equal. The gap between the highest and lowest approval project type in Harrow is 42.1% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.
See your ward's approval rate and nearby planning decisions — free and instant.
| # | Type | Decisions | Approved | Refused | Rate |
|---|---|---|---|---|---|
| 1 | Hip-to-Gable Conversion | 66 | 57 | 9 | 86.4% |
| 2 | Conservatory | 597 | 483 | 114 | 80.9% |
| 3 | Outbuilding | 1,810 | 1,425 | 385 | 78.7% |
| 4 | Front Extension | 1,938 | 1,498 | 440 | 77.3% |
| 5 | Extension (General) | 945 | 728 | 217 | 77.0% |
| 6 | New Build | 68 | 52 | 16 | 76.5% |
| 7 | Garage / Parking | 3,789 | 2,895 | 894 | 76.4% |
| 8 | Wraparound Extension | 296 | 225 | 71 | 76.0% |
| 9 | Rear Extension | 10,795 | 8,139 | 2,656 | 75.4% |
| 10 | Dormer | 4,370 | 3,262 | 1,108 | 74.6% |
| 11 | Side Extension | 4,348 | 3,205 | 1,143 | 73.7% |
| 12 | Loft Conversion | 120 | 85 | 35 | 70.8% |
| 13 | Basement | 274 | 189 | 85 | 69.0% |
| 14 | Flat Conversion | 279 | 176 | 103 | 63.1% |
| 15 | Change of Use (Residential) | 778 | 484 | 294 | 62.2% |
| 16 | HMO | 313 | 174 | 139 | 55.6% |
| 17 | Annex | 79 | 35 | 44 | 44.3% |
A hip-to-gable conversion application has a 86.4% approval rate. Annex? Just 44.3%.
Check your postcode to see what actually happens near your address.
4,204 planning applications in Harrow 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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