Terrace House: Boys × Girls Next Door (Japanese: テラスハウス ボーイズ ガールズ ネクストドア, Hepburn: Terasu Hausu Bōizu Gāruzu Nekusuto Doa) is a Japanese reality television series and the first installment of the Terrace House franchise. It follows three men and three women as they temporarily live together in a modernistic house with a terrace located in the Shōnan area of Japan. The cast moved from the first house to a second one beginning with season five in October 2013. The show aired on Fuji Television's "Cool TV" segment from October 12, 2012 to September 29, 2014 for eight seasons, after which the 2015 theatrical film Closing Door was released as a conclusion to the show.

Boys × Girls Next Door and the Closing Door film are the only iterations of the franchise produced solely by Fuji TV. Beginning with Boys & Girls in the City, the franchise has been co-produced by Fuji TV and Netflix and released internationally.