More than a dozen residents of Coconut Grove, Fla., frustrated by the trend of replacing tear-downs with monster homes, have joined together to form NAMBIES United, LLC, an acronym for Neighbors Against McMansions: Big Invasive Eyesores. The group of 16 pooled resources to buy a local home that it will rebuild. It ran a competition to choose the replacement design. The parameters of the contest called for a four-bedroom, three-bath home with a kitchen, dining room, and living room, space for a pool, and a price tag of $500,000. Against the rules: fake trim or cutting down protected trees.

Learn more about markets featured in this article: Orlando, FL.