Data-backed planning intelligence · 3,200,000+ decisions analysed across England, Scotland, Wales and Northern Ireland

Basement approval rate in Westminster

Westminster approved 92.8% of basement applications, based on 9,741 decisions analysed.

Last updated: June 2026

92.8%
basement approval rate
9,741
Basement decisions
9,041
Approved
700
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 (9,741 decided)
92.8%
Westminster all applications (64,246 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) (3,390 decided)
90.9%
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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