Data-backed planning intelligence · 3,840,000+ decisions analysed across England, Scotland, Wales and Northern Ireland

Outbuilding approval rate in Caerphilly

Caerphilly approved 71.0% of outbuilding applications, based on 210 decisions analysed.

Last updated: October 2026

71.0%
outbuilding approval rate
210
Outbuilding decisions
149
Approved
61
Refused
76.5%
Caerphilly overall

Outbuilding applications are refused more often than the Caerphilly average (76.5%).

How outbuilding applications compare in Caerphilly

Outbuilding (210 decided)
71.0%
Caerphilly all applications (3,790 decided)
76.5%

Before you apply in Caerphilly

This page shows the council-wide rate. The free check shows decisions near your property.

✓ Your ward's outbuilding approval rate
✓ Nearest comparable outbuilding decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect
Free planning check for Caerphilly →

Planning professional? PlanningLens runs refusal alerts and evidence packs for Caerphilly and any other published UK council. See the data services →

Other project types in Caerphilly

Garage and parking (1,048 decided)
76.8%
Rear extension (993 decided)
80.9%
Side extension (605 decided)
75.9%
80.0%
Other extension (474 decided)
77.2%
Dormer (260 decided)
75.4%
Conservatory (144 decided)
86.1%
Loft conversion (98 decided)
72.4%
74.2%
Front extension (84 decided)
53.6%
Annex (73 decided)
71.2%
New build (59 decided)
74.6%
HMO (41 decided)
92.7%
Basement (32 decided)
71.9%
Flat conversion (29 decided)
62.1%
81.2%
Check planning approval patterns