Rear Extension approval rate in Brentwood
Brentwood approved 84.1% of rear extension applications, based on 3,847 decisions analysed.
Last updated: June 2026
84.1%
rear extension approval rate
3,847
Rear Extension decisions
3,236
Approved
611
Refused
83.9%
Brentwood overall
Rear Extension applications are approved at roughly the same rate as the Brentwood average (83.9%).
How rear extension compares in Brentwood
Rear Extension
84.1%
Brentwood all applications
83.9%
Planning a rear extension in Brentwood?
84.1% 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
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✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Other project types in Brentwood
83.5%
82.4%
73.9%
83.3%
86.4%
80.9%
71.6%
84.2%
79.9%
77.0%
78.9%
81.6%
80.8%
67.4%
62.5%