Fallout 4 settlements/Trading post

A variety of player-owned merchant stores can be constructed after developing a settlement through Minutemen quests or by clearing out occupied settlements, and reaching level 2 in the Local Leader perk. Assigning settlers to some types of store will increase settlement happiness and all store types will produce a profit of caps based on population size (subject to a maximum limit). Caps can be collected from the settlement's inventory by accessing the workbench under Misc. s

Types of stores
There are a total of 6 types of stores in the settlement build mode each selling different items. There are 3 levels of each type, requiring an increasing amount of caps, materials, and perk levels to build, but also having more caps available for purchases, and having a wider selection of goods in stock.