I made a list. All of these are décor, except the missile silo. I didn't include any of the seasonal décor. Someone smarter than me, feel free to make this into a table so it's easier to read.
Building (Cost) Reward each (chunk size)
stone pile (20 nanos) 76 stone(X9)
wood stack (14 nanos) 76 wood (X9)
potted tree (5k gold, 500 lumber) 76 wood(X9)
iron smelter (40 nanos) 76 iron (X9)
oil tank (10 nanos) 76 oil(X9)
propane tank (3k gold, 300 oil) 38 oil (X9)
coal bin (24 nanos) 76 coal(X9)
coal powerplant (30k gold,5k lumber) 76 coal (X4)
artificial pond (340k gold) 570 gold, 57 lumber (X9)
missile silo (7k concrete,3k steel, 20stars) 152 steel (X9)
mysterious statue (38 nanos) 570 gold(X4)
siren (3500 gold,200 stone, 450steel) 190 gold (X9)
Building (Cost) Reward each (chunk size)
stone pile (20 nanos) 76 stone(X9)
wood stack (14 nanos) 76 wood (X9)
potted tree (5k gold, 500 lumber) 76 wood(X9)
iron smelter (40 nanos) 76 iron (X9)
oil tank (10 nanos) 76 oil(X9)
propane tank (3k gold, 300 oil) 38 oil (X9)
coal bin (24 nanos) 76 coal(X9)
coal powerplant (30k gold,5k lumber) 76 coal (X4)
artificial pond (340k gold) 570 gold, 57 lumber (X9)
missile silo (7k concrete,3k steel, 20stars) 152 steel (X9)
mysterious statue (38 nanos) 570 gold(X4)
siren (3500 gold,200 stone, 450steel) 190 gold (X9)