MEXICO CITY, Sept 2 (Reuters) - A unit of Mexican mining company Grupo Mexico has agreed to buy Planigrupo Latam for 14.20 pesos per share, the companies said on Friday.

The offer by Mexico Proyectos y Desarrollos values the Mexican shopping mall company at around 4.7 billion Mexican pesos ($235.7 million), Grupo Mexico said in a statement.

($1 = 19.9440 Mexican pesos) (Reporting by Carolina Pulice and Kylie Madry Editing by Chris Reese)