“I have never held so much gold and silver in my hand before,” he told the Hannoversche Allgemeine Zeitung paper on Tuesday.
“I didn't think for a second about not handing it in. Only when I was talking about the find was I asked over and over again why I gave it in,” said the 38-year-old.
He said he and a colleague had pulled up an old lino flooring of the kitchen of a flat in Hannover and were clearing out under the kitchen units to make space for tiles, when he found a plastic bag.
“We thought it was a rubbish or replacement pieces of the kitchen which had been stored there,” he said.
But the bag was full of Australian golden coins, gold nuggets stamped with Degussa, and a host of silver coins as well as silver cutlery wrapped in newspaper.
“To find such treasure, it is an odd feeling,” said the handyman.
He contacted the property management company which immediately got in touch with the dead woman's family. Although there has not yet been explicit talk of a reward for the honest handyman, the family have ensured they got his details, the Hannoversche Allgemeine Zeitung said.