Extension (General) approval rate in Hertsmere
Hertsmere approved 85.5% of extension (general) applications, based on 55 decisions analysed.
Last updated: March 2026
85.5%
extension (general) approval rate
55
Extension (General) decisions
47
Approved
8
Refused
85.1%
Hertsmere overall
Extension (General) applications are approved at roughly the same rate as the Hertsmere average (85.1%).
How extension (general) compares in Hertsmere
Extension (General)
85.5%
Hertsmere all applications
85.1%
Planning a extension (general) in Hertsmere?
85.5% get approved — but the odds vary by street. Your Pro Report 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
Get Hertsmere Pro Report — £79
✓ Nearest comparable extension (general) decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Hertsmere
83.0%
86.2%
84.6%
77.3%
82.6%
81.8%
90.8%
80.2%
88.1%
72.6%
84.6%
89.5%