NSW roads not $1.4b over budget: Minister

Rob Stokes disputes claims the costs of three major Sydney road projects have blown out. (AAP)

NSW's infrastructure minister denies the cost of three Sydney road projects have blown out by about $1.4 billion in the last financial year.

Rob Stokes said the government's M6, WestConnex and Sydney Gateway projects all remained within their budgeted figures for 2021/22, after a Transport for NSW spokesperson told Nine Newspapers the projects had increased by $1.4 billion.