Loft Conversion approval rate in Hillingdon

Hillingdon approved 73.7% of loft conversion applications, based on 475 decisions analysed.

Last updated: March 2026

73.7%

loft conversion approval rate

475

Loft Conversion decisions

350

Approved

125

Refused

78.9%

Hillingdon overall

Loft Conversion applications are refused more often than the Hillingdon average (78.9%), suggesting the council scrutinises these projects more closely.

How loft conversion compares in Hillingdon

Loft Conversion (475 decided)

73.7%

Hillingdon all applications (30,009 decided)

78.9%

Planning a loft conversion in Hillingdon?

73.7% get approved — but the odds vary by street. Your Pro Report 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

Get Hillingdon Pro Report — £79

Less than one set of revised drawings.