A woman's lack of action to ensure the six rooms she had available for rent were up to standards led to rusty plug sockets and holes in the outside walls.
Elizabeth Jones from Frenchwood, Preston was been punished for neglecting the property's upkeep under local landlord law, reports the Lancashire Evening Post.
She received a £1,500 fine and was ordered to pay additional costs of £3,515 after a magistrates' court hearing, the article noted.
Councillor Neil Cartwright of Preston council warned private landlords of the importance of obeying rental laws.
"If landlords don't follow our guidelines, we will issue improvement notices and take court action,"he told the newspaper.
The landlord law enforcement comes as the National Landlords Association today encouraged rented accommodation owners to take fire safety seriously.
David Salusbury, chairman of the landlord advice body, said private landlords should file records of all safety checks and equipment defects, as well as finding out which specific laws apply to their property types.