Insulation Contractors in Levittown, NY 85.9% of Levittown’s 17,305 homes were built in the 1940s and 50s — 40.3% in the 1940s and 45.6% in the 1950s — and 93.5% are detached houses. The median home dates from 1952. Levitt & Sons started building here in 1947, a planned community for returning World War II veterans, and the hamlet, which sits in the Town of Hempstead, is still made of those houses and the ones that filled in around them: 6.5% from the 1960s, 2.1% from before 1940, and only 1.4% built since 2000. Two more numbers set the job. 74.7% of occupied homes heat with fuel oil, against 20.1% on utility gas and 2.4% on electricity, and 93.7% are owner-occupied. The Levitt houses were built on concrete slabs with no basement, which moves nearly all of our Levittown work overhead.