Counties with the most prewar homes in Delaware Delaware News Canva - Share of homes built prewar: 5.6%- Total prewar homes: 5,410 #3. Sussex County Nagel Photography // Shutterstock - Share of homes built prewar: 5.9%- Total prewar homes: 3,952 #2. Kent County Real Window Creative // Shutterstock - Share of homes built prewar: 10.2%- Total prewar homes: 22,194This story features data reporting and writing by Elena Cox and is part of a series utilizing data automation across 50 states. #1. New Castle County Felix Lipov // Shutterstock