Annex approval rate in Harrow
Harrow approved 42.1% of annex applications, based on 76 decisions analysed.
Last updated: June 2026
42.1%
annex approval rate
76
Annex decisions
32
Approved
44
Refused
75.9%
Harrow overall
Annex applications are refused more often than the Harrow average (75.9%), suggesting the council scrutinises these projects more closely.
How annex compares in Harrow
Annex
42.1%
Harrow all applications
75.9%
Planning a annex in Harrow?
42.1% 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 annex approval rate
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
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✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Harrow
75.3%
74.6%
73.6%
76.3%
77.4%
79.0%
77.1%
81.1%
56.4%
75.5%
63.1%
69.7%
70.1%
86.4%
78.7%