The Kosho in, Chusho in and Shingoten have buildings with a half-hipped roof (Irimoya zukuri) and is roofed with shingles (Kokera buki) and all were built based upon the traditional Japanese style of residential architecture that includes a tokonoma, there is a slight Sukiya style (a house built in the style of a tea-ceremony house) being used in the narrow wooden passageway of Kosho in.
古書院、中書院、新御殿はいずれも入母屋造、柿葺（こけらぶき）で、書院造を基調としているが、古書院の縁側などには数寄屋風の要素も見られる。