Abstract: A log assembly set provides an assortment of logs and gable pieces. On opposite sides, each regular log and locking log has notches spaced an end length from each end and a separation length apart from each other. Primarily used to form a base upon which to build a structure, each floor plate log has these notches on one side but is flat on its other side Each locking log has on one side a recess section between each notch. The logs are designed to connect perpendicularly to each other via notch interfacing to form walls wherein the logs lie one longitudinally atop another. Floor boards form flooring between a pair of opposed walls. Each wall can incorporate locking logs such that each locking log disposed in one wall is coplanar with another locking log disposed in the opposite wall. Each floor board can be lockingly retained via the recess sections with each end of the board being retained between the recess-bearing middle section of a locking log and a non-recess-bearing middle section of another log.