 The largest was in 1889 when Patterson and his wife Clara added the Queen Anne Victorian section to the House.The second addition came in 1915 when Patterson's son Henry and his wife remodeled the old farm house section, and added rooms including the kitchen, a large bedroom above the kitchen, the sun porch, nursery, and a bathroom with indoor plumbing.A feature of the park is the Railroad Museum at Ardenwood which operates a narrow gauge railway, a recreation of a historic local branch of the South Pacific Coast Railroad.