Side Extension approval rate in Southwark

Southwark approved 94.3% of side extension applications, based on 1,838 decisions analysed.

Last updated: August 2026

94.3%

side extension approval rate

1,838

Side Extension decisions

1,734

Approved

104

Refused

93.5%

Southwark overall

Side Extension applications are approved at roughly the same rate as the Southwark average (93.5%).

How side extension compares in Southwark

Side Extension (1,838 decided)

94.3%

Southwark all applications (30,483 decided)

93.5%

Planning a side extension in Southwark?

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Other project types in Southwark

Garage / Parking (5,497 decided)

96.2%

Rear Extension (3,957 decided)

92.3%

Basement (3,606 decided)

94.4%

Extension (General) (2,946 decided)

94.1%

Dormer (2,809 decided)

93.2%

Change of Use (Residential) (2,226 decided)

89.4%

Loft Conversion (2,188 decided)

88.8%

New Build (1,515 decided)

95.6%

Outbuilding (1,183 decided)

93.0%

Flat Conversion (838 decided)

91.1%

Wraparound Extension (427 decided)

94.1%

Conservatory (259 decided)

92.7%

Hip-to-Gable Conversion (182 decided)

94.0%

HMO (165 decided)

84.8%

Front Extension (118 decided)

93.2%

Annex (116 decided)

94.8%

← All Southwark planning statistics

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