Complex sentence: The building is still owned by the City of Hartington, and has recently been renovated: many of the windows have been filled in with white stucco, and a new entrance door leading to the basement has been cut into the south facade.
Split into simpler sentences: The building is still owned by the City of Hartington, and has recently been renovated. Over the years, many of the windows have been filled in with white stucco, and a new entrance door leading to the basement has been cut into the south facade.