About as safe as the rest of the district, which makes it ordinary rather than a fortress. Crime runs roughly level with the borough. Almost nobody is out of work. Hardly anyone lives squeezed into a home too small for them. Ordinary is the honest word, and on a hilltop of detached houses, ordinary tends to surprise people.
The published crime rate for the area was about 72 per 1,000 residents in the year from June 2025 to May 2026. There were 97 recorded crimes over the same twelve months. That rate sits roughly 5% above the Tonbridge and Malling average, which close enough counts as level. The rate is published for the wider statistical area around the village, not the village alone, so it shouldn't be read as a precise measure of any single street.
The borough-wide rate over the same year was about 69 per 1,000. Put the two side by side and the gap is about three crimes per thousand people. That's the kind of difference estate agents call "slightly above average" when it suits them and "in line with the area" when it doesn't. Both descriptions are fair here, and neither is a reason to cross the hill off your list.
The neighbourhood itself doesn't look like the setting for a crime story. Population density averages about 600 people per square kilometre, which is spread out enough that you'll know the neighbours' cars. Unemployment is about 1%, and about 1% of households are overcrowded. None of that explains the crime figure one way or the other. It describes a settled, comfortable place, and the crime rate is a number for a wider patch that happens to include it.
What happens after a report is a separate question from how often something happens. Kent Police charged a suspect in about 16% of cases over the same twelve months, against about 12% nationally, which ranks the force sixth of 42 in England and Wales. That's a force-wide figure covering the whole county, not a measure of this village. The less comfortable number is that about 36% of cases were closed with no suspect identified. If your shed goes, the odds of getting the strimmer back aren't in your favour. That's true across most of the country, and the county force does better than most at the charging end.
Blue Bell Hill is middling on safety: level with its district, neither a trouble spot nor the crime-free hilltop the house prices might have you expecting.