Annex approval rate in Hounslow
Hounslow approved 68.8% of annex applications, based on 109 decisions analysed.
Last updated: September 2026
68.8%
annex approval rate
109
Annex decisions
75
Approved
34
Refused
88.5%
Hounslow overall
Annex applications are refused more often than the Hounslow average (88.5%), suggesting the council scrutinises these projects more closely.
How annex compares in Hounslow
Annex
68.8%
Hounslow all applications
88.5%
Planning a annex in Hounslow?
68.8% 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 annex approval rate
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Hounslow →
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Hounslow and any other published UK council — see the data services →
Other project types in Hounslow
85.0%
89.7%
88.8%
88.0%
90.2%
80.9%
85.5%
92.8%
94.8%
88.7%
90.0%
73.0%
89.9%
82.7%
48.3%