Complex sentence: Mr. Mason built up what he saw as a model industrial community in the area, with modern terrace housing for his workers, some of these houses still survive including "The Twelve Apostles" in Trafalgar Square, Hamilton Street, Gibson Terrace (Oxford Street).
Split into simpler sentences: Mr. Mason built up what he saw as a model industrial community in the area, with modern terrace housing for his workers. Some of these houses still survive, including "The Twelve Apostles" in Trafalgar Square, Hamilton Street, Gibson Terrace (Oxford Street).