Annex approval rate in Merton
Merton approved 79.2% of annex applications, based on 106 decisions analysed.
Last updated: September 2026
79.2%
annex approval rate
106
Annex decisions
84
Approved
22
Refused
86.1%
Merton overall
Annex applications are refused more often than the Merton average (86.1%), suggesting the council scrutinises these projects more closely.
How annex compares in Merton
Annex
79.2%
Merton all applications
86.1%
Planning a annex in Merton?
79.2% 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 annex approval rate
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Merton →
✓ Nearest comparable annex decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Merton and any other published UK council — see the data services →
Other project types in Merton
81.9%
90.0%
88.7%
88.7%
85.2%
87.8%
86.9%
83.2%
87.2%
83.1%
91.4%
88.8%
92.8%
79.1%
56.4%