The school is on St Joseph's Road, Carlow
St Joseph's National School in Carlow Town has tendered a contract for an extension.
The school was recently granted conditional planning permission for the erection of a single storey extension incorporating one mainstream classroom and a new main entrance lobby.
The development is at St Joseph's NS, St Joseph's Road and will be to the front of existing single storey school building.
Bidders have until May 22 to get their applications in.