new Monti tax

Assuming you are resident in Italy, and have a house in the UK, and are personally liable for the Council Tax on the UK property then you can certainly detract that Council Tax paid in the UK from any liability you have to the Italian tax authorities resulting from owning an overseas property. It is not entirely clear (yet) how you would stand if you own an overseas property on which a national tax is levied, but which is paid by a third party (for example a tenant). It is looking as if the possibility of detracting Council Tax (or similar) will be on a personal basis, rather than a property basis - which makes sense (if only Italians could write rational rules from the outset)!