Extension (General) approval rate in Hillingdon

Hillingdon approved 83.0% of extension (general) applications, based on 1,988 decisions analysed.

Last updated: June 2026

83.0%

extension (general) approval rate

1,988

Extension (General) decisions

1,650

Approved

338

Refused

79.0%

Hillingdon overall

Extension (General) applications are approved more often than the Hillingdon average (79.0%), suggesting the council is relatively receptive to these projects.

How extension (general) compares in Hillingdon

Extension (General) (1,988 decided)

83.0%

Hillingdon all applications (30,584 decided)

79.0%

Planning a extension (general) in Hillingdon?

83.0% 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
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
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