Kallhäll is a neighbourhood in Järfälla Municipality, Stockholm County. It is a suburban part of Stockholm urban area with a population of 12,000 inhabitants as of 2011 (including Stäket). Kallhäll started as an industrial suburb when the industrialist Erik Bolinder decided to move his Bolinders Mechanical Shops to Kallhäll from Kungsholmen in central Stockholm. Housing for employees was built, thus expanding Kallhäll. The Bolinder factory structures remain today, encircled by expensive, modern lakeside residences.
https://en.wikipedia.org/wiki/Kallh%C3%A4ll