The National Association of Home Builders (NAHB) surveys their members each quarter to discover what they expect of future sales.
The builders base a large part of their answer on how many people are visiting their sales centers and model homes versus the same time last year.
The results in their most recent survey show that builders have never been more confident about buyers who are 55 and older.
The confidence index for this age group is actually double of what it was in 2012. The NAHB sites low interest rates and strong job growth as the reasons for the high confidence.