The breech house can be utilized to train on explosive or mechanical entry into a house. The house is equipped with 4 solid core exterior doors and 2 metal commercial doors. One of the metal doors opens outward and the other opens inward. The building also has an area to explosively breech through a wall if desired. The interior of the house is an open floor plan with office partitions or cubicle dividers that can be moved to changed if Simunition use and training after entry is desired. The house is specially built with reinforced door jam areas to expedite replacement of the doors if desired.