Eva (Germany). It shows Ludwigslust Castle (18th century) The stamp was issued on January 2, 2015.
If you prefer more ancient castles, maybe you would like the Château de Boulogne-sur Mer (13th century) in France. Quite an important building that has deserved, at least, two recent stamps: one self adhesive issued on June 9, 2012; and another one issued on May 9, 2014.
What about Switzerland? This castle does not seem a bad place to live in...
The first stamp issued on May 26, 1977. It shows Schloss Sargans was the seat of the Count of Werdenberg-Sargans. The castle was built in the 13th century and is located in the town of the same name in Canton St. Gallen. On the right one (issued on May 13, 1997), you can see the Casa Patriziale Russo Ticino.
Definitely, a house is a better place to live. At least, cheaper. These stepped-gable Dutch houses look really nice. And you can even choose the colour. White or blue?
As self-adhesive stamps, they belong to the basic series of Dutch Icons issued on January 2, 2014.
Really on a budget? If you are not too big, you can try this little house issued by Posti (Finland) on January 24, 2011. I know it is a mail box, but... what could be better for a snail mail lover?
Also for small people, especially if you have a sweet tooth: gingerbread houses issued by USPS on November 6, 2013.