Basement approval rate in Lambeth

Lambeth approved 84.7% of basement applications, based on 3,518 decisions analysed.

Last updated: August 2026

84.7%

basement approval rate

3,518

Basement decisions

2,980

Approved

538

Refused

84.5%

Lambeth overall

Basement applications are approved at roughly the same rate as the Lambeth average (84.5%).

How basement compares in Lambeth

Basement (3,518 decided)

84.7%

Lambeth all applications (31,836 decided)

84.5%

Planning a basement in Lambeth?

84.7% get approved, but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.

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Other project types in Lambeth

Rear Extension (6,170 decided)

82.2%

Garage / Parking (4,575 decided)

87.3%

Loft Conversion (3,574 decided)

78.0%

Dormer (3,194 decided)

81.3%

Flat Conversion (2,903 decided)

89.2%

Change of Use (Residential) (2,610 decided)

79.2%

Side Extension (2,252 decided)

85.2%

New Build (2,138 decided)

85.2%

Extension (General) (1,539 decided)

85.2%

Outbuilding (994 decided)

84.3%

Hip-to-Gable Conversion (470 decided)

77.0%

Wraparound Extension (396 decided)

83.1%

Conservatory (357 decided)

87.7%

HMO (270 decided)

65.6%

Front Extension (71 decided)

77.5%

Annex (63 decided)

77.8%

← All Lambeth planning statistics

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