Extension (General) approval rate in Blackburn with Darwen
Blackburn with Darwen approved 87.9% of extension (general) applications, based on 1,931 decisions analysed.
Last updated: September 2026
87.9%
extension (general) approval rate
1,931
Extension (General) decisions
1,697
Approved
234
Refused
87.7%
Blackburn with Darwen overall
Extension (General) applications are approved at roughly the same rate as the Blackburn with Darwen average (87.7%).
How extension (general) compares in Blackburn with Darwen
Extension (General)
87.9%
Blackburn with Darwen all applications
87.7%
Planning a extension (general) in Blackburn with Darwen?
87.9% 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 extension (general) approval rate
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Blackburn with Darwen →
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Blackburn with Darwen and any other published UK council — see the data services →
Other project types in Blackburn with Darwen
90.3%
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%