Double House Tile
Double Houses produce money.
As the people prefer to live in neighbourhoods that are neither too big nor too small,
you can achieve the best results by placing 3 adjacent houses.
Nerdy Details
$$x = (\frac{-|h-3|+3}{2/3}+0.5)*b$$-
h: Sum of all house tiles und double house tiles in the direct neighborhood -
b: Strongest boost tile boost in radius 3 -
x: Production rate