An Auckland man feels "betrayed" after his partner of almost 30 years died and left him only her ashes.

A decision in the Auckland High Court ordered that Steven Moon be paid $300, 000 from the estate of his former partner, Mary Doyle.

Their relationship lasted for 27 years with Doyle describing the pair as "friends" in legal documents.

Opposing counsel argued the two did not live together and had no shared assets.