The paper aims to clarify layout conditions of the Nagaya-mon gate focusing on setting up premises of farmhouse. Utsunomiya city in Tochigi prefecture were chosen for investigation of map surveys on web browser and field studies. All gates in the city were categorized into several types from view-points of gate's attributes, such as orientation, common axis with main house, and connection with public road adjacent to the site. Typical patterns of premises' layout are found as follows: 1) both main houses and Nagaya-mon gates mostly face the south; 2) layout of the premises shows that main house and Nagaya-mon gate have common axis along each approach with parallel position; 3) Nagaya-mon gate mainly faces minor public roads or private roads. Considering the transition of the surroundings, original Nagaya-mon gate is assumed to have a private road on its own site.