Extension (General) approval rate in Hillingdon

Name: Extension (General) planning approval rate in Hillingdon
Creator: PlanningLens
Published: 2026-09-30T18:28:47+00:00
License: https://creativecommons.org/licenses/by/4.0/

Hillingdon approved 83.8% of extension (general) applications, based on 2,035 decisions analysed.

Last updated: September 2026

83.8%

extension (general) approval rate

2,035

Extension (General) decisions

1,706

Approved

329

Refused

77.9%

Hillingdon overall

Extension (General) applications are approved more often than the Hillingdon average (77.9%), suggesting the council is relatively receptive to these projects.

How extension (general) compares in Hillingdon

Extension (General) (2,035 decided)

83.8%

Hillingdon all applications (21,800 decided)

77.9%

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
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Free planning check for Hillingdon →

Planning professional? PlanningLens runs refusal alerts and evidence packs for Hillingdon and any other published UK council — see the data services →