The nation's single-family housing market is springing back to life, and the luxury market is budding right along with it.

Luxury homes have received a healthy boost from historically low mortgage rates, increased buyer confidence and burgeoning interest from foreign investors looking to capitalize on favorable exchange rates.

One bellwether of the recovery: Toll Brothers, the largest luxury home builder in the United States, reported that fourth-quarter revenues (ended Oct. 31, 2012) were up 48%, and new orders were the highest level seen since 2006.