Local Measures Downsize McMansions

"Although there is no single set of nationwide data on such ordinances, the National Trust for Historic Preservation tracks the issue through its anti-teardown initiative. In a May 2006 study it found that more than 300 communities in 33 states have taken steps to combat teardowns and overbuilding by imposing demolition delays, limits on square footage, and creating conservation districts."

"Among the more innovative attempts to curb McMansion building, Boulder County, Colorado, is hashing out the details of a quasi cap-and-trade scheme. The county's median house size ballooned from 3,881 square feet, in 1990, to 6,290 square feet in 2006-more than twice the national averages for both size and growth rate during that period. A proposed "transferable development rights" (TDR) plan would require homeowners and developers seeking to exceed 6,500 square feet in the flatlands, or 4,500 square feet in the mountains, to purchase credits either from the owners of properties that are under those caps, or from a county clearinghouse."