According to the National Association of Home Builders' What Home Buyers Really Want report, more than half of new and potential home buyers prefer to purchase a new home.
Custom home builders and building companies have a nearly-equal shot at the market of buyers purchasing new homes; 27% preferred a custom build on a private lot, and 28% preferred a new home from a developer.

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SOURCE: National Association of Home Builders' What Home Buyers Really Want, May 2013