Side Extension approval rate in Merthyr Tydfil
Merthyr Tydfil approved 88.5% of side extension applications, based on 61 decisions analysed.
Last updated: September 2026
88.5%
side extension approval rate
61
Side Extension decisions
54
Approved
7
Refused
88.6%
Merthyr Tydfil overall
Side Extension applications are approved at roughly the same rate as the Merthyr Tydfil average (88.6%).
How side extension compares in Merthyr Tydfil
Side Extension
88.5%
Merthyr Tydfil all applications
88.6%
Planning a side extension in Merthyr Tydfil?
88.5% 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 side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Merthyr Tydfil →
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Planning professional? PlanningLens runs refusal alerts and evidence packs for Merthyr Tydfil and any other published UK council — see the data services →
Other project types in Merthyr Tydfil
92.3%
98.1%
89.1%
90.0%
86.4%
78.9%
21.1%
94.4%
81.2%
91.7%
90.0%