The ‘right to buy’ scheme, which allows people to buy their council or housing association-owned properties, is set to end in Wales.
Tenants who have been in their home for more than five years have until January 26 to buy their homes.
The scheme has already been suspended in parts of Wales, including Cardiff and Powys, but is set to come into effect across Caerphilly County Borough later this month.
The policy, which was originally introduced by Margaret Thatcher in 1980, is being scrapped by the Welsh Government.
Caerphilly County Borough Council has advised tenants that if they are eligible to buy their homes, they will need to submit their application by January 25. Any applications made after this date will not be accepted.
Tenants must have completed an application form available from their landlord or the Welsh Government website and submitted it to their landlord before the deadline if they want to buy their homes outright.
Housing and Local Government Minister Julie James said: “We passed the Abolition of the Right to Buy and Associated Rights Act to protect the stock of social housing in Wales from further reduction, so it is available to provide affordable housing for people who need it. This legislation is one of a range of actions we are taking to increase the supply of housing in Wales.
“Between 1981 and 2016, over 139,000 local authority and housing association homes were sold under the Right to Buy. This has led to many people, many of whom are vulnerable, waiting longer to access a home they can afford.”