safe as houses

Idioms  

1. Totally secure, as in If you buy Treasury bonds, your money will be safe as houses but you won't get a large return. In today's security-conscious climate, where alarm systems to deter housebreaks have become increasingly common, this simile may seem puzzling. Presumably it uses house in the sense of “a shelter from the elements.” [Late 1800s]

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Example Sentences

"I've always felt as safe as houses here," he said.

From BBC

Her previous books are a short story collection, “Safe as Houses,” and a novel, “2 A.M. at the Cat’s Pajamas.”

From New York Times

I’m sure I’d be safe as houses at a luxury resort, but that doesn’t scream finding yourself, does it?

From The Guardian

"Murder in Hospital. Murder on the Operating table. Safe—yes, safe as houses!"

From Literature

The British have a phrase for a strong sense of security: “safe as houses.”

From Washington Post