Total Crime Rate
127.0 per 1,000
All offences · Oct 2024 - Sep 2025Brynmawr Close area has the 25th highest crime rate of 66 local areas in Pontprennau and Old St Mellons , and the 269th highest crime rate of 1,028 local areas in Cardiff .
Crime levels at this postcode are much higher than in the adjoining streets, suggesting that most neighbouring areas are relatively safer than this one.
The overall crime rate in the area around Brynmawr Close (CF3 0HJ) in the last 12 months was 127.0 per 1,000 residents and was 61.7% higher 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 Violence and sexual offences with 23 offences recorded. The least common crime was Bicycle theft with 1 case , unchanged from 2024. The fastest-growing crime category was Criminal damage and arson ( 400.0% YoY). The sharpest decline was Other theft ( -25.0% YoY).
Violent crimes totalled 31 (≈ 69.0 per 1,000 residents). Year-over-year these were rising ( 40.9% ). Over the last decade, overall crime has falling ( -31.3% comparing early vs recent averages) .
In the area around Brynmawr Close (CF3 0HJ), the main crime hotspot is near Syon Park Close. Police recorded 19 crimes here, including 14 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 | Violence and sexual offences | Machen Close | Under investigation |
| Sep 2025 | Anti-social behaviour | Caerleon Close | — |
| Sep 2025 | Violence and sexual offences | Eugene Close | Under investigation |
| Sep 2025 | Other crime | Thrush Close | Under investigation |
| Sep 2025 | Criminal damage and arson | Clos Y Berllan | Investigation complete; no suspect identified |
| Sep 2025 | Violence and sexual offences | Clos-Yr-Onnen | Under investigation |
| Sep 2025 | Other crime | Clos-Yr-Onnen | Under investigation |
| Sep 2025 | Violence and sexual offences | Blaenavon Close | Under investigation |
| Sep 2025 | Violence and sexual offences | Brynmawr Close | Under investigation |
| Sep 2025 | Violence and sexual offences | Brynmawr Close | Under investigation |
| Sep 2025 | Other theft | Raglan Close | Under investigation |
StreetScan crime figures are based on official UK open data:
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