Basement approval rate in Bromley

Bromley approved 80.4% of basement applications, based on 734 decisions analysed.

Last updated: March 2026

80.4%

basement approval rate

734

Basement decisions

590

Approved

144

Refused

80.9%

Bromley overall

Basement applications are approved at roughly the same rate as the Bromley average (80.9%).

How basement compares in Bromley

Basement (734 decided)

80.4%

Bromley all applications (36,212 decided)

80.9%

Planning a basement in Bromley?

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Other project types in Bromley

Rear Extension (10,946 decided)

82.2%

Garage / Parking (8,143 decided)

79.1%

Side Extension (5,503 decided)

78.1%

Dormer (5,444 decided)

79.0%

Loft Conversion (4,048 decided)

79.6%

New Build (1,744 decided)

73.0%

Change of Use (Residential) (1,732 decided)

74.4%

Outbuilding (1,698 decided)

77.0%

Hip-to-Gable Conversion (1,648 decided)

80.6%

Front Extension (1,575 decided)

77.5%

Extension (General) (1,451 decided)

78.4%

Conservatory (1,305 decided)

84.3%

Wraparound Extension (1,270 decided)

79.1%

Flat Conversion (255 decided)

74.1%

Annex (224 decided)

62.1%

HMO (174 decided)

58.0%

← All Bromley planning statistics

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