Extension (General) approval rate in Hertsmere
Hertsmere approved 89.3% of extension (general) applications, based on 75 decisions analysed.
Last updated: August 2026
89.3%
extension (general) approval rate
75
Extension (General) decisions
67
Approved
8
Refused
87.8%
Hertsmere overall
Extension (General) applications are approved at roughly the same rate as the Hertsmere average (87.8%).
How extension (general) compares in Hertsmere
Extension (General)
89.3%
Hertsmere all applications
87.8%
Planning a extension (general) in Hertsmere?
89.3% 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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Free planning check for Hertsmere →
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Hertsmere
86.6%
91.4%
91.2%
87.2%
87.9%
95.0%
89.1%
92.9%
94.8%
82.5%
83.2%
93.8%
100.0%
100.0%