Source: Parcel data provided by Town of Hamden. "Year built" shows only the most recent year of construction for current buildings, which is missing for about 7% of parcels, and does not show original dates for buildings torn down and replaced. Map developed by Jack Dougherty (Trinity College CT) and Ilya Ilyankou (Picturedigits). View data and code on GitHub. Learn more at OnTheLine.trincoll.edu.