An Englishman's house is his castle.

The proverb presents the home as a place where its occupant can expect privacy and decide what happens within it. The castle image conveys security and independence.

It can also express resistance to unwanted interference in domestic life. Its point is the value of having a space one can call one’s own, not a claim to unlimited authority.

Use it when discussing someone’s wish to protect their privacy at home or to make decisions about their own household. It may sound pointed when said in response to an unwelcome intrusion or demand.