Side Extension approval rate in Southwark

Southwark approved 94.3% of side extension applications, based on 1,824 decisions analysed.

Last updated: June 2026

94.3%

side extension approval rate

1,824

Side Extension decisions

1,720

Approved

104

Refused

93.4%

Southwark overall

Side Extension applications are approved at roughly the same rate as the Southwark average (93.4%).

How side extension compares in Southwark

Side Extension (1,824 decided)

94.3%

Southwark all applications (30,054 decided)

93.4%

Planning a side extension in Southwark?

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Other project types in Southwark

Garage / Parking (5,449 decided)

95.9%

Rear Extension (3,909 decided)

92.2%

Basement (3,571 decided)

94.2%

Extension (General) (2,915 decided)

94.1%

Dormer (2,767 decided)

93.1%

Change of Use (Residential) (2,217 decided)

89.6%

Loft Conversion (2,162 decided)

88.6%

New Build (1,494 decided)

95.6%

Outbuilding (1,156 decided)

92.8%

Flat Conversion (837 decided)

91.3%

Wraparound Extension (418 decided)

94.0%

Conservatory (257 decided)

92.6%

Hip-to-Gable Conversion (180 decided)

94.4%

HMO (164 decided)

84.8%

Annex (117 decided)

94.0%

Front Extension (114 decided)

93.0%

← All Southwark planning statistics

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