Outbuilding approval rate in Blackburn with Darwen

Blackburn with Darwen approved 88.7% of outbuilding applications, based on 282 decisions analysed.

Last updated: May 2026

88.7%

outbuilding approval rate

282

Outbuilding decisions

250

Approved

Refused

89.0%

Blackburn with Darwen overall

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

How outbuilding compares in Blackburn with Darwen

Outbuilding (282 decided)

88.7%

Blackburn with Darwen all applications (12,526 decided)

89.0%

Planning a outbuilding in Blackburn with Darwen?

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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%

Change of Use (Residential) (1,076 decided)

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%

Wraparound Extension (215 decided)

85.6%

Front Extension (157 decided)

87.9%

Flat Conversion (102 decided)

71.6%

Basement (101 decided)

87.1%

Annex (88 decided)

89.8%

Hip-to-Gable Conversion (69 decided)

91.3%

Loft Conversion (62 decided)

83.9%

HMO (29 decided)

55.2%

← All Blackburn with Darwen planning statistics

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