Notable buildings, in addition to the Settlement, include the Spirella factory, where ladies foundation garments were made and is now converted into offices; a cinema building (the Broadway) in art deco style.
The Cloisters was built in 1905 as an open-air school dedicated to Psychology and where students were taught skills from the Arts and Crafts movement. After a period of neglect during World War II the Cloisters became the North Hertfordshire Masonic Centre in 1951. It is a Grade II listed building.
There are two independent schools - St Christophers (co-educational) and St Francis (for girls) and two state schools – Highfield and Fernhill – both co-educational.
During World War 2 machines known as “bombes” conceived by Alan Turing for de-coding messages generated by the German Enigma machine were built in Letchworth by the British tabulating machine (later International Computers and Tabulators and then International Computers Ltd).