Loft Conversion approval rate in Hillingdon

Hillingdon approved 74.3% of loft conversion applications, based on 498 decisions analysed.

Last updated: August 2026

74.3%

loft conversion approval rate

498

Loft Conversion decisions

370

Approved

128

Refused

80.0%

Hillingdon overall

Loft Conversion applications are refused more often than the Hillingdon average (80.0%), suggesting the council scrutinises these projects more closely.

How loft conversion compares in Hillingdon

Loft Conversion (498 decided)

74.3%

Hillingdon all applications (30,835 decided)

80.0%

Planning a loft conversion in Hillingdon?

74.3% 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 loft conversion approval rate
✓ Nearest comparable loft conversion decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

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