as safe as houses
US /æz seɪf æz ˈhaʊzɪz/
UK /æz seɪf æz ˈhaʊzɪz/

1.
absolut sicher, bombenfest
very safe and secure
:
•
Don't worry about your investments, they're as safe as houses.
Mach dir keine Sorgen um deine Investitionen, sie sind absolut sicher.
•
The new security system makes the building as safe as houses.
Das neue Sicherheitssystem macht das Gebäude absolut sicher.