The incident occurred during the early hours of Tuesday morning in Katrineholm, central Sweden, when a 66-year-old man used a chainsaw to break into the sleeping woman's house.
"When he attacked her with the saw she screamed 'Jesus'," one of the woman's neighbours told the Aftonbladet paper.
"It probably saved her life, because then he went back down to his apartment."
The man still managed to attack her with the chainsaw, however, causing injuries to her head and hands. Her injuries were not life-threatening.
Police arrested the man for attempted murder.
The man's motive is thought to lie in a neighbourhood feud. He was going to be evicted on July 1st after multiple complaints from his neighbours, who reported him for playing animal noises at a high volume when he left home.
He is reported to have played the animal noises for hours on end over throughout the years.
One neighbour said that there was a range of different animals he would use.
"Sometimes it was a dog barking for half an hour with the volume turned up," they told the paper. "Sometimes it was an owl that hooted. He just turned it on and left the house."
See pictures of the chainsawed door here.