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Outbuilding approval rate in Caerphilly

Caerphilly approved 71.2% of outbuilding applications, based on 205 decisions analysed.

Last updated: August 2026

71.2%
outbuilding approval rate
205
Outbuilding decisions
146
Approved
59
Refused
78.2%
Caerphilly overall

Outbuilding applications are refused more often than the Caerphilly average (78.2%), suggesting the council scrutinises these projects more closely.

How outbuilding compares in Caerphilly

Outbuilding (205 decided)
71.2%
Caerphilly all applications (4,981 decided)
78.2%

Planning a outbuilding in Caerphilly?

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Other project types in Caerphilly

Garage / Parking (1,024 decided)
76.8%
Rear Extension (978 decided)
80.8%
Side Extension (597 decided)
75.7%
80.1%
Extension (General) (466 decided)
77.5%
Dormer (257 decided)
75.1%
Conservatory (139 decided)
86.3%
Loft Conversion (98 decided)
72.4%
73.9%
Front Extension (82 decided)
52.4%
Annex (72 decided)
70.8%
New Build (58 decided)
74.1%
HMO (40 decided)
92.5%
Basement (32 decided)
71.9%
Flat Conversion (27 decided)
63.0%
81.2%
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