Rear Extension approval rate in Brentwood
Brentwood approved 83.5% of rear extension applications, based on 3,957 decisions analysed.
Last updated: September 2026
83.5%
rear extension approval rate
3,957
Rear Extension decisions
3,306
Approved
651
Refused
79.4%
Brentwood overall
Rear Extension applications are approved more often than the Brentwood average (79.4%), suggesting the council is relatively receptive to these projects.
How rear extension compares in Brentwood
Rear Extension
83.5%
Brentwood all applications
79.4%
Planning a rear extension in Brentwood?
83.5% 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 Brentwood →
✓ 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 Brentwood and any other published UK council — see the data services →
Other project types in Brentwood
83.2%
81.8%
73.1%
83.2%
79.8%
86.1%
70.1%
84.0%
79.7%
76.9%
76.3%
82.0%
81.0%
67.4%
55.6%