As an existing customer Allianz agreed to offer fire & lightning only cover last year and again this year on one of my relations unoccupied house. Cost was just over €300. Note there is no water, storm, robbery, public liability etc with this policy.
On another relations unoccupied house Allianz refused any cover after year 2.
There are several that offer unoccupied house insurance, OBF and Kidd Insurances are two. Cover from any of them though is limited, usually only fire & lightning, but unlike Allianz most of the others that I looked at also cover public liability.
Although water damage is not covered, any that I looked at had as a condition of cover that the water be turned off at the mains, and the entire plumbing and heating systems be drained.
There were lots of other conditions, some wanted the electricity off as well, gardens must be maintained, property inspected regularly, photos of outside front and back and all rooms internally etc.
It’s not cheap either, this limited cover from the specialist insurers on a standard 3 bed semi in Dublin that I am familiar with cost €800.
It also threw up another problem, Visiting family from abroad used to use the house occasionally for short stays, but with no heating or water the house can no longer be used.