Side Extension approval rate in Southwark

Southwark approved 94.2% of side extension applications, based on 1,731 decisions analysed.

Last updated: March 2026

94.2%

side extension approval rate

1,731

Side Extension decisions

1,630

Approved

101

Refused

93.3%

Southwark overall

Side Extension applications are approved at roughly the same rate as the Southwark average (93.3%).

How side extension compares in Southwark

Side Extension (1,731 decided)

94.2%

Southwark all applications (28,675 decided)

93.3%

Planning a side extension in Southwark?

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Other project types in Southwark

Garage / Parking (5,251 decided)

95.9%

Rear Extension (3,757 decided)

92.1%

Basement (3,459 decided)

94.0%

Extension (General) (2,834 decided)

94.0%

Dormer (2,669 decided)

93.1%

Change of Use (Residential) (2,140 decided)

89.5%

Loft Conversion (2,067 decided)

88.4%

New Build (1,453 decided)

95.5%

Outbuilding (1,098 decided)

92.9%

Flat Conversion (824 decided)

91.1%

Wraparound Extension (398 decided)

93.7%

Conservatory (244 decided)

92.2%

Hip-to-Gable Conversion (171 decided)

94.7%

HMO (157 decided)

84.1%

Annex (114 decided)

93.9%

Front Extension (110 decided)

92.7%

← All Southwark planning statistics

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