"Domicile is the state where the decedent lived before his/ her passing. Estate situated in the state of deceased’s permanent residence is domiciliary estate. It is the place to which the decedent intended to return even though s/he actually has resided elsewhere. Domiciliary estate is to be established when the decedent has property in multiple states. Domiciliary administration is the settlement and distribution of a decedent's domiciliary estate. Usually a domiciliary executor is named in a will. A domiciliary executor can be chosen by the courts to distribute assets for the deceased."

Nel tuo caso penso si faccia riferimento alla doppia residenza fiscale.. quindi FORSE è l'immobile di residenza principale....