Complex sentence: The house was built on the site of the old manor house in 1817 for Timothy Hutchinson (High Sheriff of Durham in 1858) to a design by architect Ignatius Bonomi.
Split into simpler sentences: The house was built in 1817 on the site of the old manor house. It was commissioned by Timothy Hutchinson (High Sheriff of Durham in 1858) to a design by architect Ignatius Bonomi.