Rear Extension approval rate in Brentwood
Brentwood approved 84.1% of rear extension applications, based on 3,747 decisions analysed.
Last updated: March 2026
84.1%
rear extension approval rate
3,747
Rear Extension decisions
3,150
Approved
597
Refused
83.8%
Brentwood overall
Rear Extension applications are approved at roughly the same rate as the Brentwood average (83.8%).
How rear extension compares in Brentwood
Rear Extension
84.1%
Brentwood all applications
83.8%
Planning a rear extension in Brentwood?
84.1% get approved — but the odds vary by street. Your Pro Report 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
Get Brentwood Pro Report — £79
✓ Nearest comparable rear extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Less than one set of revised drawings.
Other project types in Brentwood
83.3%
82.2%
73.8%
83.4%
86.3%
80.7%
71.7%
83.9%
79.6%
76.4%
78.8%
81.9%
81.4%
65.8%
62.5%