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Basement approval rate in Blackburn with Darwen

Blackburn with Darwen approved 87.1% of basement applications, based on 101 decisions analysed.

Last updated: April 2026

87.1%
basement approval rate
101
Basement decisions
88
Approved
13
Refused
89.0%
Blackburn with Darwen overall

Basement applications are approved at roughly the same rate as the Blackburn with Darwen average (89.0%).

How basement compares in Blackburn with Darwen

Basement (101 decided)
87.1%
Blackburn with Darwen all applications (12,526 decided)
89.0%

Planning a basement in Blackburn with Darwen?

87.1% get approved — but the odds vary by street. Your Pro Report shows exactly what gets approved and refused near your property.

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Other project types in Blackburn with Darwen

Rear Extension (2,166 decided)
90.2%
Extension (General) (1,911 decided)
87.8%
Garage / Parking (1,389 decided)
88.8%
78.6%
Side Extension (1,057 decided)
88.3%
Dormer (559 decided)
81.9%
New Build (450 decided)
84.0%
Conservatory (310 decided)
92.6%
Outbuilding (282 decided)
88.7%
Wraparound Extension (215 decided)
85.6%
Front Extension (157 decided)
87.9%
Flat Conversion (102 decided)
71.6%
Annex (88 decided)
89.8%
91.3%
Loft Conversion (62 decided)
83.9%
HMO (29 decided)
55.2%
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