Extension (General) approval rate in Hertsmere
Hertsmere approved 89.7% of extension (general) applications, based on 78 decisions analysed.
Last updated: September 2026
89.7%
extension (general) approval rate
78
Extension (General) decisions
70
Approved
8
Refused
87.5%
Hertsmere overall
Extension (General) applications are approved more often than the Hertsmere average (87.5%), suggesting the council is relatively receptive to these projects.
How extension (general) compares in Hertsmere
Extension (General)
89.7%
Hertsmere all applications
87.5%
Planning a extension (general) in Hertsmere?
89.7% 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 Hertsmere →
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Hertsmere and any other published UK council — see the data services →
Other project types in Hertsmere
86.6%
91.8%
91.6%
87.9%
89.7%
88.3%
95.2%
93.2%
95.3%
82.8%
83.3%
100.0%
93.8%
100.0%
100.0%