The Neighbourhood Unit
What it is
The Neighbourhood Unit was a planning formula set out by the American sociologist Clarence Perry in 1929, in his contribution to the Regional Plan of New York and Its Environs. It defined a residential cell sized so that all homes lay within walking distance of a centrally placed elementary school, with the population scaled to that school's catchment. The unit was bounded by arterial roads that carried through-traffic around rather than through it, and contained internal parks, local shops at the edges and a community focus at its centre. The design aimed to create a safe, self-contained setting for family and community life.
Why it matters
It became the default building block for suburbs, public housing estates and new towns across the world through the twentieth century. Its inward-looking, school-centred cell shaped countless residential layouts, though its road hierarchy was later criticised for fragmenting urban connectivity.
Plans it shaped
- Regional Plan of New York & Its Environs (1929)
- County of London Plan (1943)
- Greater London Plan (1944)
- Stevenage New Town (1946)
- Harlow New Town (1947)
- Nairobi Master Plan (1948) (1948)
- Kraków Nowa Huta (historic plan) (1949)
- Vällingby ABC-town (1950s)
- Chandigarh (1951–1965)
- Stockholm General Plan (1952)
- Cumbernauld New Town (1955)
- Islamabad (1960)