Side Extension approval rate in Lewisham

Lewisham approved 76.0% of side extension applications, based on 1,181 decisions analysed.

Last updated: June 2026

76.0%

side extension approval rate

1,181

Side Extension decisions

897

Approved

284

Refused

82.9%

Lewisham overall

Side Extension applications are refused more often than the Lewisham average (82.9%), suggesting the council scrutinises these projects more closely.

How side extension compares in Lewisham

Side Extension (1,181 decided)

76.0%

Lewisham all applications (25,419 decided)

82.9%

Planning a side extension in Lewisham?

76.0% 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 side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Free planning check for Lewisham →

Other project types in Lewisham

Rear Extension (4,713 decided)

75.5%

Garage / Parking (3,651 decided)

83.1%

Flat Conversion (2,760 decided)

83.7%

Extension (General) (2,724 decided)

84.1%

Loft Conversion (2,647 decided)

79.3%

Dormer (2,062 decided)

81.5%

Change of Use (Residential) (2,046 decided)

78.5%

Basement (1,243 decided)

82.5%

Hip-to-Gable Conversion (892 decided)

82.0%

Outbuilding (837 decided)

82.8%

HMO (470 decided)

61.3%

Wraparound Extension (449 decided)

84.6%

Conservatory (363 decided)

83.2%

New Build (303 decided)

88.8%

Annex (80 decided)

68.8%

Front Extension (61 decided)

60.7%

← All Lewisham planning statistics

Check planning approval patterns, Free