Indexation often ends up adding considerably to the cost of cover, but you are only ever insured for the maximum actual buildings/contents replacement amount so it's a good idea to revise it annually to ensure it meets your needs. As pj111 said, use the buildings guide at scs. For contents, there is no specific guide, but it's easy enough to do a tot around the house, (including outbuildings & garages), to get a ball-park figure, and add a few bob extra for things you missed. Underwriters often have "bands" for cover up to certain limits, ie €25K /30K etc. It might be useful to know this should you arrive at a borderline figure in your calculations. Also remember, you are looking at "replacement" value, which means as new. And remember to look at specified /unspecified all risks cover if you have it. This is for items like jewellry outside the home. This cover is often quite expensive, so only take it if you actually need it. If your lucky enough to have especially valuable items, like antiques or paintings, ensure they are specified under contents. This doesn't usually cost anything, but its very helpful in the event of a claim.