A newbuild is a house, or a group of houses, that is being built now or has only just been finished. You hear it most in British English, especially from people who sell homes. They set a newbuild against an older house that someone has already lived in. In ads it often means a whole new street or block, not one room that was repaired. Americans more often say new construction or a newly built home. It is everyday business language, not a poetic word. You may also see it written new-build.