Data-backed planning intelligence · 3,700,000+ decisions analysed across England, Scotland, Wales and Northern Ireland

Extension (General) approval rate in Westminster

Westminster approved 90.9% of extension (general) applications, based on 3,435 decisions analysed.

Last updated: August 2026

90.9%
extension (general) approval rate
3,435
Extension (General) decisions
3,123
Approved
312
Refused
90.8%
Westminster overall

Extension (General) applications are approved at roughly the same rate as the Westminster average (90.8%).

How extension (general) compares in Westminster

Extension (General) (3,435 decided)
90.9%
Westminster all applications (65,586 decided)
90.8%

Planning a extension (general) in Westminster?

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✓ Your ward's extension (general) approval rate
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Other project types in Westminster

Basement (9,847 decided)
92.8%
Rear Extension (3,218 decided)
87.5%
Loft Conversion (3,046 decided)
88.4%
Garage / Parking (2,813 decided)
93.5%
New Build (1,329 decided)
92.6%
Dormer (1,252 decided)
86.1%
91.4%
Outbuilding (624 decided)
88.5%
Conservatory (613 decided)
89.9%
Flat Conversion (606 decided)
96.4%
Side Extension (507 decided)
88.2%
HMO (140 decided)
73.6%
Annex (111 decided)
93.7%
Front Extension (54 decided)
87.0%
79.3%
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