Data-backed planning intelligence · 3,200,000+ decisions analysed across England, Scotland, Wales and Northern Ireland

Dormer approval rate in Harrow

Harrow approved 74.6% of dormer applications, based on 4,257 decisions analysed.

Last updated: June 2026

74.6%
dormer approval rate
4,257
Dormer decisions
3,175
Approved
1,082
Refused
75.9%
Harrow overall

Dormer applications are approved at roughly the same rate as the Harrow average (75.9%).

How dormer compares in Harrow

Dormer (4,257 decided)
74.6%
Harrow all applications (21,804 decided)
75.9%

Planning a dormer in Harrow?

74.6% get approved, but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.

✓ Your ward's dormer approval rate
✓ Nearest comparable dormer decisions
✓ Refusal triggers specific to your area
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Other project types in Harrow

Rear Extension (10,512 decided)
75.3%
Side Extension (4,224 decided)
73.6%
Garage / Parking (3,654 decided)
76.3%
Front Extension (1,890 decided)
77.4%
Outbuilding (1,769 decided)
79.0%
Extension (General) (908 decided)
77.1%
63.5%
Conservatory (582 decided)
81.1%
HMO (287 decided)
56.4%
Wraparound Extension (286 decided)
75.5%
Flat Conversion (274 decided)
63.1%
Basement (267 decided)
69.7%
Loft Conversion (117 decided)
70.1%
Annex (76 decided)
42.1%
86.4%
New Build (61 decided)
78.7%
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