At 7:30am, Thalang police were called to the scene in Moo Baan Farang in Bang Rong, Paklock, to investigate the thefts that occurred between 3-5am.
The three foreign residents awoke in the morning to find a number of valuables and cash missing, and all admitted to regularly leaving their doors unlocked.
Emilienne Folie, 59, a Belgian national, told police that B30,000 in cash had been stolen, along with her passport, three bank cards and two bottles of imported liquor.
Marc Vandoorne, 47, also from Belgium, said that B3,000 in cash had been stolen, as well as a notebook, an iPhone 5 and two phone chargers.
The third house robbed was that of Louis Martinez, 68, a French national. He realised his house had also been burgled only when he saw the police in the neighbourhood.
Mr Martinez said the screen door leading to the pool had been slashed and B7,000 in cash was stolen, as well as a gold necklace (worth B18,800), Ray-Ban sunglasses, and three bank cards.
Police said the robber or robbers entered the houses via the back doors, which were left unlocked. The burglar seemed to know his or her way around the houses, which suggests that he or she could be acquainted with the residents.
One witness told police that when she awoke, she noticed a suspicious Honda Scoopy parked behind a truck on the street.
Police believe there could be at least three people involved in the robberies.