Goliad Jr. 8 rm. Round (+frt). The Goliad Jr. has all the features of the Goliad in an eight room starter house (two stackable housing units). The Goliad is one of the most flexible Martin houses on the market. The ability to stack additional floors makes it a great house for any aluminum construction material or the insulated roof, this house caters to the Martin's needs! Door entrance holes are 2 1/8 in diameter.