House should be insured for the rebuilding cost, not the market value, which would in all likelihood be higher. in theory it shoudl cost much the same to build a house in Shrewsbury road as in Kimmage (per monopoly board), but the market value of each would be substantially different.
As a general rule, contents are defined as anything you can take with you if moving, thus fitter kitchen or wardrobes are part of the building whilst washing machine would be contents. Built in cooker would be building, but stand alone would be contents. carpets would be contents, but timber follr would be building.
Depending on the insurer, the concept of average may apply. That means that if you have the house insured for €100k but the rebuilding cost is €200K, in the event of a claim for €50K, you would only be paid €25K if average applied, but if average did not apply, you would get the full €50K.