All the incidents have taken place over the past week.
Police are reminding van owners to make sure their vehicles, valuables and tools are secure after recent thefts in Dronfield, Renishaw and Holymoorside.
The most recent incidents happened on Monday 4 November, with a drill and a wallet stolen from a van parked at Renishaw Park Golf Club between 10.30am and 2pm, and a drill, angle grinder, saw and batteries stolen from a van parked on Bage Hill, Holymoorside between 9am and 10am.
A lawnmower and tools were also believed to have been taken from a van parked on Snape Hill Crescent at Dronfield sometime overnight between Thursday 31 October and Friday 1 November.
Our officers are carrying out inquiries and would like to hear from anyone who may have noticed anything suspicious.
Inspector Rob Bowns, who is in charge of policing in the North East Derbyshire area, said: “This type of crime can have a big impact on their victims, who have to replace their tools and equipment and may not be able to work in the meantime.
“Van owners can help reduce the risk of being targeted by making sure that vans are locked whenever they’re left unattended, that tools and valuables are removed and that it is parked in a well-lit and secure area overnight, covered by CCTV if possible.”
Insp. Bowns added: “We would also urge people to resist the temptation to buy tools or equipment cheap, through online second hand sales or auction sites, car boots, or ‘off the back of a lorry,’ as criminals can be profiting by selling on stolen goods.”