Our house is a link-detached property and Axa only lists semi-detached or detached as options. By choosing detached, the yearly premium increases by over £300. As the two houses don’t share a main building party wall, then, for insurance purposes, your house is detached, unless an insurer offers the link-detached description. John Lewis has since confirmed to you that detached was correct. For insurance purposes, your house is detachedGiven the significant rise in your premiums, you could use comparison sites to get quotes from other insurers, before going back to John Lewis to negotiate.