It means that the property is brand new, never lived in and not necessarily built this year. You may still come across properties built in 2009, 2010, 2011, that are considered NEW CONSTRUCTION just because Builder still holds title and no one has lived in there yet.
Please visit our website http://www.glrealtysales.com for the newest NEW CONSTRUCTION properties and/or to find through a MLS search some resale properties for comparison.
It should mean a home you are buying from the builder, hence NEW CONSTRUCTION as opposed to a resale home.
Please contact me directly if I can be of further service.