Looks to me exactly like a young couple posing in front of their new home shortly after moving in with their new (to them) car in the garage.
I can't imagine any other reason why such an unexciting background would have been chosen, unless that house was special to them.
1940s? Yes I think so, or early 50s. Despite wearing a tie, the man is barefoot, so he must be very relaxed and comfortable - again suggesting this is his own home.
I'm looking at a couple in their mid to late 20s. The shadow of the photographer is in the foreground.