Complex sentence: It was built about 1750, and is a two-story, five bay, Georgian style house has a formal entrance, centrally located and sheltered by a one-story portico which extends across the center two-thirds of the façade.
Split into simpler sentences: It was built about 1750, and is a two-story, five bay, Georgian style house. It features a one-story portico across the center two-thirds of the façade.