Dormer approval rate in Hertsmere
Hertsmere approved 90.7% of dormer applications, based on 475 decisions analysed.
Last updated: June 2026
90.7%
dormer approval rate
475
Dormer decisions
431
Approved
44
Refused
87.4%
Hertsmere overall
Dormer applications are approved more often than the Hertsmere average (87.4%), suggesting the council is relatively receptive to these projects.
How dormer compares in Hertsmere
Dormer
90.7%
Hertsmere all applications
87.4%
Planning a dormer in Hertsmere?
90.7% 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
86.0%
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%