Data-backed planning intelligence · 3,840,000+ decisions analysed across England, Scotland, Wales and Northern Ireland

Flat Conversion approval rate in Westminster

Westminster approved 96.4% of flat conversion applications, based on 608 decisions analysed.

Last updated: September 2026

96.4%
flat conversion approval rate
608
Flat Conversion decisions
586
Approved
22
Refused
90.5%
Westminster overall

Flat Conversion applications are approved more often than the Westminster average (90.5%), suggesting the council is relatively receptive to these projects.

How flat conversion compares in Westminster

Flat Conversion (608 decided)
96.4%
Westminster all applications (56,619 decided)
90.5%

Planning a flat conversion in Westminster?

96.4% 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 flat conversion approval rate
✓ Nearest comparable flat conversion decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
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Planning professional? PlanningLens runs refusal alerts and evidence packs for Westminster and any other published UK council — see the data services →

Other project types in Westminster

Basement (9,951 decided)
92.8%
Extension (General) (3,488 decided)
91.0%
Rear Extension (3,254 decided)
87.6%
Loft Conversion (3,080 decided)
88.4%
Garage / Parking (2,837 decided)
93.5%
New Build (1,339 decided)
92.6%
Dormer (1,280 decided)
86.0%
91.3%
Outbuilding (634 decided)
88.3%
Conservatory (620 decided)
90.0%
Side Extension (520 decided)
87.9%
HMO (144 decided)
73.6%
Annex (111 decided)
93.7%
Front Extension (55 decided)
87.3%
80.0%
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