Basement approval rate in Lambeth

Lambeth approved 85.0% of basement applications, based on 3,456 decisions analysed.

Last updated: March 2026

85.0%

basement approval rate

3,456

Basement decisions

2,936

Approved

520

Refused

84.6%

Lambeth overall

Basement applications are approved at roughly the same rate as the Lambeth average (84.6%).

How basement compares in Lambeth

Basement (3,456 decided)

85.0%

Lambeth all applications (30,422 decided)

84.6%

Planning a basement in Lambeth?

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Less than one set of revised drawings.

Other project types in Lambeth

Rear Extension (5,992 decided)

82.2%

Garage / Parking (4,482 decided)

87.4%

Loft Conversion (3,494 decided)

78.2%

Dormer (3,133 decided)

81.4%

Flat Conversion (2,891 decided)

89.5%

Change of Use (Residential) (2,548 decided)

79.0%

Side Extension (2,175 decided)

84.9%

New Build (2,101 decided)

85.6%

Extension (General) (1,481 decided)

85.1%

Outbuilding (939 decided)

83.3%

Hip-to-Gable Conversion (461 decided)

76.8%

Wraparound Extension (381 decided)

82.7%

Conservatory (343 decided)

87.2%

HMO (256 decided)

66.4%

Front Extension (71 decided)

77.5%

Annex (61 decided)

75.4%

← All Lambeth planning statistics

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