The house was designed a by prominent local architect named C.B. Chappell in the Queen Anne revival style which was popular from roughly the 1870's to the 1920's. The original Queen Anne's style was the English architecture popular during the early 1700's (Queen Anne reigned from 1702-1714). Queen Anne revival style- which doesn't actually look much like the original Queen Anne stuff- is characterized by asymmetrical features, turrets, steep roofs, and sizable porches, all of which are in evidence on Eden Hall.
Eden Hall is in the historic district of Charlottetown, and just down the street is another historic home which is now owned by the local heritage foundation and open to the public. It's called Beaconsfield House, and we paid it a visit while we were in town.