Outbuilding approval rate in Lambeth

Lambeth approved 84.3% of outbuilding applications, based on 994 decisions analysed.

Last updated: August 2026

84.3%

outbuilding approval rate

994

Outbuilding decisions

838

Approved

156

Refused

84.5%

Lambeth overall

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

How outbuilding compares in Lambeth

Outbuilding (994 decided)

84.3%

Lambeth all applications (31,836 decided)

84.5%

Planning a outbuilding in Lambeth?

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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%

Basement (3,518 decided)

84.7%

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%

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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