Outbuilding approval rate in Hounslow
Hounslow approved 80.9% of outbuilding applications, based on 4,237 decisions analysed.
Last updated: September 2026
80.9%
outbuilding approval rate
4,237
Outbuilding decisions
3,429
Approved
808
Refused
88.5%
Hounslow overall
Outbuilding applications are refused more often than the Hounslow average (88.5%), suggesting the council scrutinises these projects more closely.
How outbuilding compares in Hounslow
Outbuilding
80.9%
Hounslow all applications
88.5%
Planning a outbuilding in Hounslow?
80.9% 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 outbuilding approval rate
✓ Nearest comparable outbuilding decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Hounslow →
✓ Nearest comparable outbuilding 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%
85.5%
92.8%
94.8%
88.7%
90.0%
73.0%
89.9%
82.7%
48.3%
68.8%