Annex approval rate in Merthyr Tydfil

Merthyr Tydfil approved 94.4% of annex applications, based on 18 decisions analysed.

Last updated: August 2026

94.4%

annex approval rate

Annex decisions

Approved

Refused

90.9%

Merthyr Tydfil overall

Annex applications are approved more often than the Merthyr Tydfil average (90.9%), suggesting the council is relatively receptive to these projects.

How annex compares in Merthyr Tydfil

Annex (18 decided)

94.4%

Merthyr Tydfil all applications (1,203 decided)

90.9%

94.4% 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

92.1%

98.7%

80.3%

89.0%

88.1%

New Build (50 decided)

90.0%

Outbuilding (43 decided)

86.0%

Dormer (37 decided)

81.1%

HMO (19 decided)

21.1%

81.2%

Conservatory (11 decided)

90.9%