Side Extension approval rate in Gwynedd
Gwynedd approved 92.7% of side extension applications, based on 441 decisions analysed.
Last updated: September 2026
92.7%
side extension approval rate
441
Side Extension decisions
409
Approved
32
Refused
87.8%
Gwynedd overall
Side Extension applications are approved more often than the Gwynedd average (87.8%), suggesting the council is relatively receptive to these projects.
How side extension compares in Gwynedd
Side Extension
92.7%
Gwynedd all applications
87.8%
Planning a side extension in Gwynedd?
92.7% 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 Gwynedd →
✓ 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 Gwynedd and any other published UK council — see the data services →
Other project types in Gwynedd
91.5%
85.9%
86.6%
93.7%
79.3%
84.4%
95.9%
79.0%
91.5%
88.4%
88.9%
64.9%
69.7%
92.6%