"It's hard to get a clean masion neighborhood in SC4 without plopping, I always wished that you can kinda like assign the wealth also and not just the density." - from GMT 21/1/09 I often make mansion only suburbs by zoning a 3x3 light residential leaving a 3x3 space right next to it blank. I then add parks etc to attract the wealthy. The mansions grow on all the zoned squares and once they are established I go back and fill in the blank 3x3 spaces with light residential which also grows mansions leaving you with streets and streets of them next to each other. Hope this is helpful ;-)