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: June 2026

87.9%

extension (general) approval rate

1,931

Extension (General) decisions

1,697

Approved

234

Refused

89.1%

Blackburn with Darwen overall

Extension (General) applications are approved at roughly the same rate as the Blackburn with Darwen average (89.1%).

How extension (general) compares in Blackburn with Darwen

Extension (General) (1,931 decided)

87.9%

Blackburn with Darwen all applications (12,714 decided)

89.1%

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 →

Other project types in Blackburn with Darwen

Rear Extension (2,200 decided)

90.3%

Garage / Parking (1,414 decided)

89.0%

Change of Use (Residential) (1,090 decided)

78.5%

Side Extension (1,073 decided)

88.4%

Dormer (571 decided)

82.3%

New Build (458 decided)

84.3%

Conservatory (314 decided)

92.7%

Outbuilding (287 decided)

88.9%

Wraparound Extension (221 decided)

86.0%

Front Extension (159 decided)

88.1%

Basement (103 decided)

87.4%

Flat Conversion (102 decided)

71.6%

Annex (88 decided)

89.8%

Hip-to-Gable Conversion (72 decided)

91.7%

Loft Conversion (64 decided)

84.4%

HMO (29 decided)

55.2%

← All Blackburn with Darwen planning statistics

Check planning approval patterns, Free