Data-backed planning intelligence · 3,200,000+ 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 3,390 decisions analysed.

Last updated: June 2026

90.9%
extension (general) approval rate
3,390
Extension (General) decisions
3,083
Approved
307
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) (3,390 decided)
90.9%
Westminster all applications (64,246 decided)
90.8%

Planning a extension (general) in Westminster?

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✓ Your ward's extension (general) approval rate
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✓ Refusal triggers specific to your area
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Other project types in Westminster

Basement (9,741 decided)
92.8%
Rear Extension (3,168 decided)
87.7%
Loft Conversion (3,022 decided)
88.3%
Garage / Parking (2,773 decided)
93.4%
New Build (1,317 decided)
92.6%
Dormer (1,214 decided)
86.0%
90.9%
Outbuilding (611 decided)
88.5%
Flat Conversion (606 decided)
96.4%
Conservatory (603 decided)
89.9%
Side Extension (495 decided)
88.3%
HMO (135 decided)
74.8%
Annex (109 decided)
94.5%
Front Extension (53 decided)
88.7%
75.9%
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