How to make a one way mirror?

I live with in Stamford, ct
I have access to New Jersey, Connecticut, New York. Very simply I want to keep a window exposed to let in light.
But I m building a wall/hallway in front
I d like to see out the wall and wish to have a one way mirror in the opening in the wall. Therefore, not have
The public see in.

Stefanie

  3 answers