Rear Extension approval rate in Blackburn with Darwen
Blackburn with Darwen approved 90.3% of rear extension applications, based on 2,200 decisions analysed.
Last updated: June 2026
90.3%
rear extension approval rate
2,200
Rear Extension decisions
1,987
Approved
213
Refused
89.1%
Blackburn with Darwen overall
Rear Extension applications are approved at roughly the same rate as the Blackburn with Darwen average (89.1%).
How rear extension compares in Blackburn with Darwen
Rear Extension
90.3%
Blackburn with Darwen all applications
89.1%
Planning a rear extension in Blackburn with Darwen?
90.3% 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 rear extension approval rate
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
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Free planning check for Blackburn with Darwen →
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Blackburn with Darwen
87.9%
89.0%
88.4%
82.3%
84.3%
92.7%
88.9%
86.0%
88.1%
87.4%
71.6%
89.8%
91.7%
84.4%
55.2%