They are called "Packers party houses," and some of them are, but their use has evolved in the dozen years since the first party houses opened on Stadium Drive in Ashwaubenon and Shadow Lane in Green Bay. Property prices on the streets closest to the stadium are booming and that is changing how the houses are used. The most recent evolution was out-of-town buyers who demolished existing houses on Shadow Lane, immediately north of the stadium, and replaced them with something bigger and more expensive. Doug Schoepp, a Madison car dealer, started the trend, spending about $1 million to buy, demolish and rebuild 1233 Shadow Lane. Robert Endries of Brillion took the process further, spending $615,000 on 1225 Shadow Lane and replacing it with a $1.6 million, Lambeau Field-looking castle. "I think as time goes on, you'll have 10 more of them," Endries said. Houses on the residential streets closest to Lambeau now are routinely listed for $500,000 and one on Shadow Lane is on the market for $1 million.