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

Basement approval rate in Westminster

Westminster approved 92.8% of basement applications, based on 9,847 decisions analysed.

Last updated: August 2026

92.8%
basement approval rate
9,847
Basement decisions
9,135
Approved
712
Refused
90.8%
Westminster overall

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

How basement compares in Westminster

Basement (9,847 decided)
92.8%
Westminster all applications (65,586 decided)
90.8%

Planning a basement in Westminster?

92.8% 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 basement approval rate
✓ Nearest comparable basement decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
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Other project types in Westminster

Extension (General) (3,435 decided)
90.9%
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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