Side Extension approval rate in Kingston upon Thames

Kingston upon Thames approved 74.8% of side extension applications, based on 2,646 decisions analysed.

Last updated: March 2026

74.8%

side extension approval rate

2,646

Side Extension decisions

1,979

Approved

667

Refused

75.2%

Kingston upon Thames overall

Side Extension applications are approved at roughly the same rate as the Kingston upon Thames average (75.2%).

How side extension compares in Kingston upon Thames

Side Extension (2,646 decided)

74.8%

Kingston upon Thames all applications (15,415 decided)

75.2%

Planning a side extension in Kingston upon Thames?

74.8% get approved — but refusal triggers vary by street.

✔ Your ward's side extension approval rate
✔ Nearest comparable side extension decisions
✔ Refusal triggers specific to your area
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Less than one set of revised drawings.

Other project types in Kingston upon Thames

Rear Extension (5,762 decided)

73.3%

Garage / Parking (3,192 decided)

75.8%

Loft Conversion (3,105 decided)

73.4%

Dormer (3,002 decided)

74.3%

New Build (1,644 decided)

69.8%

Hip-to-Gable Conversion (1,435 decided)

75.5%

Outbuilding (914 decided)

75.5%

Conservatory (700 decided)

78.7%

Change of Use (Residential) (663 decided)

60.3%

Front Extension (591 decided)

72.9%

Wraparound Extension (582 decided)

79.6%

Extension (General) (489 decided)

75.1%

Basement (376 decided)

72.3%

Flat Conversion (242 decided)

49.6%

HMO (94 decided)

63.8%

Annex (92 decided)

69.6%

← All Kingston upon Thames planning statistics