Rear Extension approval rate in Brentwood
Brentwood approved 84.2% of rear extension applications, based on 3,885 decisions analysed.
Last updated: August 2026
84.2%
rear extension approval rate
3,885
Rear Extension decisions
3,271
Approved
614
Refused
84.0%
Brentwood overall
Rear Extension applications are approved at roughly the same rate as the Brentwood average (84.0%).
How rear extension compares in Brentwood
Rear Extension
84.2%
Brentwood all applications
84.0%
Planning a rear extension in Brentwood?
84.2% 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 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%
74.2%
83.4%
81.1%
86.4%
71.8%
84.1%
79.9%
77.1%
79.1%
82.0%
81.0%
67.4%
58.8%