After deflecting rumors for months, Miami, Fla.,-based Lennar Corp. let the cat out of the bag in June when officials at its western headquarters leaked some details about new construction techniques the builder has been testing at the former air base in El Toro, Calif. Lennar is developing the site into its Great Park master-planned community.

A Lennar spokesman confirmed a report, which appeared in the Orange County Business Journal, that the builder has constructed and torn down about 40 prototype homes, including whole tracts, on the base's runway and inside a giant aircraft hangar, in order to experiment with innovative building techniques (such as a "dry" house with minimal plumbing), new house features, and green technologies.

Lennar vice president Marshall Ames told BUILDER that at least four different product lines emerged from those tests, although he could not comment immediately about Lennar's plans to eventually bring those products to other communities around the country.

Learn more about markets featured in this article: Los Angeles, CA, Miami, FL.