Rear Extension approval rate in Hertsmere
Hertsmere approved 86.0% of rear extension applications, based on 1,206 decisions analysed.
Last updated: June 2026
86.0%
rear extension approval rate
1,206
Rear Extension decisions
1,037
Approved
169
Refused
87.4%
Hertsmere overall
Rear Extension applications are approved at roughly the same rate as the Hertsmere average (87.4%).
How rear extension compares in Hertsmere
Rear Extension
86.0%
Hertsmere all applications
87.4%
Planning a rear extension in Hertsmere?
86.0% 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 rear extension approval rate
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Hertsmere →
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Hertsmere
90.7%
90.7%
86.1%
86.9%
94.7%
88.1%
92.7%
94.2%
83.0%
81.3%
89.0%
93.5%
100.0%
100.0%