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

Basement approval rate in Caerphilly

Caerphilly approved 71.9% of basement applications, based on 32 decisions analysed.

Last updated: October 2026

71.9%
basement approval rate
32
Basement decisions
23
Approved
9
Refused
76.5%
Caerphilly overall

This rate rests on 32 decisions, a small sample, so treat it with caution.

How basement applications compare in Caerphilly

Basement (32 decided)
71.9%
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 basement approval rate
✓ Nearest comparable basement 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%
Outbuilding (210 decided)
71.0%
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%
Flat conversion (29 decided)
62.1%
81.2%
Check planning approval patterns