Cassiobury
Middle areaSouth west Watford. 8,392 people (mid-2024 estimate) in 4.3 square kilometres.
Radon Affected Area by middle area
Worked out by Open Index · 2022
About 89% of people in Cassiobury live in a 1 km square that the radon atlas marks as a radon Affected Area.
Recorded crime in Cassiobury
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Cassiobury at a rate of 72.8 per 1,000 people.
That compares with 110.3 per 1,000 people across Watford.
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
| Kind of crime | Recorded |
|---|---|
| Violence and sexual offences | 185 |
| Other crime | 149 |
| Anti-social behaviour | 112 |
| Vehicle crime | 45 |
| Drug offences | 39 |
| Criminal damage and arson | 36 |
| Burglary | 24 |
| Robbery | 11 |
| Theft from the person | 8 |
| Shoplifting | 2 |
Source: police.uk, 12 months to August 2026
How Cassiobury compares
Each dot is a middle area. The black line marks the middle one.
Is Cassiobury safe? What police records show
In the 12 months to August 2026, police recorded crimes and anti-social behaviour in Cassiobury at a rate of 72.8 per 1,000 people.
That compares with 110.3 per 1,000 people across Watford.
Across England as a whole, the recorded crime rate was 96.3 per 1,000 people.
In August 2026 alone, 62 cases of crime and anti-social behaviour were recorded in Cassiobury.
In the 12 months to August 2026, the most common types were violence and sexual offences (185), other crime (149) and anti-social behaviour (112).
Worked out by Open Index from police.uk crime records and ONS and NISRA population estimates.
Rates are per resident, so places that many people work in or visit, such as Westminster, the City of London and other city centres, have far higher rates than their residents alone would suggest.
Figures for the whole of Watford
These figures are published for the whole of Watford, not for each middle area, so they describe all of Watford and not Cassiobury alone. See Watford
Cassiobury in brief
The median price paid for a home in Cassiobury was £777,500 in 2025.
Cassiobury had 8,228 usual residents at the census.
About 89% of people in Cassiobury live in a 1 km square that the radon atlas marks as a radon Affected Area.
In Cassiobury, 97.7% of homes and businesses could get gigabit-capable broadband in January 2026.