The area got its start in the 1950s when a Chicago pest control baron, Lee Ratner, and several partners bought thousands of acres of farmland and plotted about 100,000 lots. With Fort Myers, 15 miles to the west, developers left little room for schools, parks or even businesses.

What they sold was sun and quiet living.

“They used to bring 20 busloads a day,” said Bob Elliott, a former salesman for Mr. Ratner’s company who struck out on his own in 1982. “We had 300 customers, seven days a week.”

By 2000, the lots had been sold, but most stayed empty. Only about 30,000 people were living in an area roughly four times the size of Manhattan. The builders really started to arrive in 2004, setting up model homes on Lee Boulevard next to Mr. Elliott’s office with the faded wooden sign that said “$50 lots.”

Bill Spikowski, a city planning consultant in Fort Myers, said that because Lehigh Acres had so many parcels and few restrictions on what could be built, smaller companies battled for customers. From 2004 to the end of 2006, developers completed 13,183 units in Lehigh Acres — nearly doubling the total stock of 15,216 that existed in 2000, according to Lee County figures.

Residents remember the boom for its noise, with dump trucks lining the streets and power tools heard in nearly every neighborhood. Housing prices doubled, then tripled, and jobs were plentiful, nearly all of them tied to real estate.

Signs of trouble were ignored. “Sometimes houses would sell three or four times in a few months, and no one would move in,” Mr. Elliott said.

Then in 2007, it all went quiet. Houses stopped selling. Foreclosures multiplied. The median home price in the Fort Myers area dropped to $215,200 in December 2007, from a peak of $322,300 in December 2005. It had fallen to $106,900 two months ago.