Annex approval rate in Southwark

Southwark approved 93.9% of annex applications, based on 114 decisions analysed.

Last updated: May 2026

93.9%

annex approval rate

114

Annex decisions

107

Approved

Refused

93.3%

Southwark overall

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

How annex compares in Southwark

Annex (114 decided)

93.9%

Southwark all applications (28,675 decided)

93.3%

Planning a annex in Southwark?

93.9% get approved — but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.

✓ Your ward's annex approval rate
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Free planning check for Southwark →

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%

Side Extension (1,731 decided)

94.2%

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%

Front Extension (110 decided)

92.7%

← All Southwark planning statistics

Check planning approval patterns — Free