Total Crime Rate
54.8 per 1,000
All offences · Oct 2024 - Sep 2025Clos Nant Y Cwm area has the 24th lowest crime rate of 66 local areas in Pontprennau and Old St Mellons , and the 464th lowest crime rate of 1,028 local areas in Cardiff .
At least one of the neighbouring streets has high or very high crime levels. However, overall crime around this postcode is more mixed, with some nearby areas experiencing lower crime.
The overall crime rate in the area around Clos Nant Y Cwm (CF23 8LG) in the last 12 months was 54.8 per 1,000 residents and was 30.1% lower than the Pontprennau and Old St Mellons average (78.5 per 1,000 residents). In the last 12 months, this area’s most reported crimes were Anti-social behaviour with 6 offences recorded. The least common crime was Other theft with 1 case , down -66.7% compared to 2024. The fastest-growing crime category was Violence and sexual offences ( 500.0% YoY). The sharpest decline was Other theft ( -66.7% YoY).
Violent crimes totalled 8 (≈ 25.8 per 1,000 residents). Year-over-year these were rising ( 700.0% ). Over the last decade, overall crime has falling ( -58.1% comparing early vs recent averages) .
In the area around Clos Nant Y Cwm (CF23 8LG), the main crime hotspot is near Clos Y Ffynnon. Police recorded 8 crimes here, including 6 violent or public-order offences. All these locations are within roughly 0.3 miles.
View Crime In Pontprennau and Old St Mellons| Month | Crime | Location* | Last Outcome |
|---|---|---|---|
| Sep 2025 | Anti-social behaviour | Maes Y Hedydd | — |
| Sep 2025 | Anti-social behaviour | Clos Cwm Creunant | — |
| Sep 2025 | Violence and sexual offences | Clos Alyn | Under investigation |
| Sep 2025 | Public order | Naseby Close | Unable to prosecute suspect |
StreetScan crime figures are based on official UK open data:
Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright and database right.