TGV from Paris, some direct to Narbonne, others change at Montpellier. Some leave direct from Charles de Gaulle airport, or from the Gare de Lyon, Paris.
Ryanair fly from Stansted Airport, London, direct to Carcassonne, half an hour from the property. You can collect a hire car at Carcassonne and get onto the Autoroute des Deux Mers (A61). The exit at Lézignan-Corbières (Exit 25) is only 8ks from Villerouge la Crémade. Half an hour from Carcassonne.
Alternatively you can fly to Toulouse from Paris, London, or other European cities, collect a car and take the autoroute as above. One and a half hours from Toulouse.
From Paris there is the choice of several different routes, one of the most direct being by way of Orleans, Clermont-Ferrand and Millau, Béziers, Narbonne and Lézignan, exit as above. Villerouge la Crémade is about 870k from Paris so an overnight stay en route can be very pleasant.
From Barcelona the A7 - A9 takes you to Narbonne, then the A61 to Lézignan as above.
After confirmation and payment, precise directions on how to find the property will be forwarded.