The owners of a row of derelict terraced homes have been told they must be repaired within six months or the buildings face demolition.
Carmarthenshire council has issued enforcement notices on 178 to 194 Cwmamman Road in Garnant, Amman Valley.
It said the eight properties had been a blight on the main road through the village for many years.
If the work is not done the council said it could demolish the buildings and recover the costs in court.
The council's empty property adviser Stefan Nurse said: "We want to work with the owners to either renovate or demolish the properties.
"The authority is happy to provide the owners with advice, guidance and technical support to satisfy the requirements of the notice."
Carmarthenshire council said it was taking action to tackle empty properties across the county.
Garnant councillor Kevin Madge said the empty properties were an eyesore and a potential safety issue.
"This site has been a longstanding blight on the community and I am pleased that action is being taken," he added.