Dormer approval rate in Hertsmere
Hertsmere approved 86.2% of dormer applications, based on 318 decisions analysed.
Last updated: May 2026
86.2%
dormer approval rate
318
Dormer decisions
274
Approved
44
Refused
85.1%
Hertsmere overall
Dormer applications are approved at roughly the same rate as the Hertsmere average (85.1%).
How dormer compares in Hertsmere
Dormer
86.2%
Hertsmere all applications
85.1%
Planning a dormer in Hertsmere?
86.2% 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 dormer approval rate
✓ Nearest comparable dormer decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Hertsmere →
✓ Nearest comparable dormer decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Hertsmere
83.0%
84.6%
77.3%
82.6%
81.8%
90.8%
80.2%
88.1%
72.6%
85.5%
84.6%
89.5%