Dormer approval rate in Hertsmere
Hertsmere approved 91.2% of dormer applications, based on 501 decisions analysed.
Last updated: August 2026
91.2%
dormer approval rate
501
Dormer decisions
457
Approved
44
Refused
87.8%
Hertsmere overall
Dormer applications are approved more often than the Hertsmere average (87.8%), suggesting the council is relatively receptive to these projects.
How dormer compares in Hertsmere
Dormer
91.2%
Hertsmere all applications
87.8%
Planning a dormer in Hertsmere?
91.2% 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
86.6%
91.4%
87.2%
87.9%
95.0%
89.1%
92.9%
94.8%
82.5%
83.2%
89.3%
93.8%
100.0%
100.0%