I do believe most buildings in Dorfleben games are for decoration only. I found at least 2 that serve a purpose. I will list buildings that I find serve a purpose here. If you know of any I’ve missed please let me know!
Brick or Dutch Mill:
Produces flour which is used to make a number of products in the game. The Brick Mill also produces cornmeal.
Allows you to fertilize plots.
Requires several pipe stacks, and glass panes to assemble which can be received as gifts.
Requires drill gear and water pump for assembly and RC is required to purchase these two items.
Also requires sprinklers to be placed on plots in order to work. These can be received as gifts or purchased for RC.
Requires paint, wood and tile for assembly. All of these items can be received as gifts. Some levels require items that require RC to level up.
The warehouse can be used to store various animals, decorations, and gear when not in use. It saves room in your game by only needing the items you currently want to use in your game at one time.
To place items in your warehouse. My comment was wrong you can place gear, decorations and animals in here . You can NOT place trees or land plots in here. To place items in warehouse, go to the move button and select the one that looks like a warehouse. Then click on item you want to move into the ware house to place.
Sell for 5366
Botanical Arch Hedge (Side)
Sell for 10643
Botanical Arc Hedge (Top)
Sell for 6349
Botanical Arc Hedge (Bottom)
Sell For 2749
Heart-Shaped Floral Arch
Sell For 9843
Floral Eiffel Tower
Sell For 3019
Eiffel Tower Model–10
Fairy Garden Moss Terrarium