Rear Extension approval rate in Chelmsford
Chelmsford approved 86.4% of rear extension applications, based on 118 decisions analysed.
Last updated: September 2026
86.4%
rear extension approval rate
118
Rear Extension decisions
102
Approved
16
Refused
83.1%
Chelmsford overall
Rear Extension applications are approved more often than the Chelmsford average (83.1%), suggesting the council is relatively receptive to these projects.
How rear extension compares in Chelmsford
Rear Extension
86.4%
Chelmsford all applications
83.1%
Planning a rear extension in Chelmsford?
86.4% 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 Chelmsford →
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Chelmsford and any other published UK council — see the data services →
Other project types in Chelmsford
85.4%
83.5%
89.2%
89.2%
96.6%
96.0%
87.0%
90.0%
94.7%
100.0%