In good night mister tom where does Zach live?

In the book "Goodnight Mister Tom," Zachariah (Zach) lives in London during World War II. Specifically, he lives in a cramped and impoverished area of London, likely in a slum or working-class neighborhood. The book doesn't specify an exact address, but it's clear that his living conditions are very harsh and he doesn't have much to eat.

Later in the story, when he is evacuated from London, Zach is sent to the countryside to stay with Mr. Tom.