Several sheds and vehicles have been broken into on the same road in Liskeard.
Thousands of pounds worth of power tools were taken from Trevanion Road in the early hours of Thursday morning.
The sheds were all secured with padlocks but had been forced open.
Police are appealing for information, particularly about a man who was seen acting suspiciously in the area at the time of the offences.
He is described as 6 feet tall, of slim build with short blond hair and wearing dark clothing.
He was seen getting out of a light coloured saloon type car, possibly beige or silver, before driving away.
Anyone with information is asked to contact PC Sara Lobb at Liskeard police station by telephoning 101, quoting crime reference BD/12/1277.