I am currently in the process of obtaining devis for installing a fosse septique for a cottage renovation in the Charente. Can anyone tell me what rate of TVA I should be paying. One devis quotes 5.5% the other 19.6%. I had a word with the clerk at the local marie who said that if the work was within or on the house, it would be 5.5%, but as it's not the house as such I have to pay 19.6%. Seems pretty daft to me as the fosse is considered an essential as there is no main sewer system in the village. Can anyone shed any light on this for me.