Extension (General) approval rate in Hillingdon

Hillingdon approved 83.8% of extension (general) applications, based on 2,013 decisions analysed.

Last updated: August 2026

83.8%

extension (general) approval rate

2,013

Extension (General) decisions

1,686

Approved

327

Refused

80.0%

Hillingdon overall

Extension (General) applications are approved more often than the Hillingdon average (80.0%), suggesting the council is relatively receptive to these projects.

How extension (general) compares in Hillingdon

Extension (General) (2,013 decided)

83.8%

Hillingdon all applications (30,835 decided)

80.0%

Planning a extension (general) in Hillingdon?

83.8% 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 extension (general) approval rate
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✓ Refusal triggers specific to your area
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