Investigators say a lavish home destroyed by a weekend fire in central Iowa might have been saved with a couple overlooked precautions. It was already after dark Sunday evening when firefighters answered a call to a home described as a “mansion” — the home of a developer who’d reportedly built most of the houses in the surrounding neighborhood. The home was engulfed in flames by the time the report came in, and the icy cold and wind hampered West Des Moines firefighters. Preliminary estimates put the loss at three-million dollars. West Des Moines fire codes require a sprinkler system in any home over 8-thousand square feet, and the home David Walters built is described as being ten-thousand square feet in size — but when it was built it was outside city limits. The home has an alarm system but the owner says it was not working at the time of the fire.