Annex approval rate in Blackburn with Darwen
Blackburn with Darwen approved 89.8% of annex applications, based on 88 decisions analysed.
Last updated: April 2026
89.8%
annex approval rate
88
Annex decisions
79
Approved
9
Refused
89.0%
Blackburn with Darwen overall
Annex applications are approved at roughly the same rate as the Blackburn with Darwen average (89.0%).
How annex compares in Blackburn with Darwen
Annex
89.8%
Blackburn with Darwen all applications
89.0%
Planning a annex in Blackburn with Darwen?
89.8% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.
✓ Your ward's annex approval rate
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✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Blackburn with Darwen
90.2%
87.8%
88.8%
88.3%
81.9%
84.0%
92.6%
88.7%
85.6%
87.9%
71.6%
87.1%
91.3%
83.9%
55.2%