MAIN MUNICIPALITIES:
Beauchamp, Eaubonne, Enghien-les-Bains, Ermont, Franconville, Montmorency, Saint-Gratien, Sannois, Taverny.





The Montmorency Valley is best known as a prime residential area, but the areas zoned for economic activities located along the RER provide with a rich base of SMEs specializing in mechanical engineering, plastics or electronics, and generally in all high-tech fields. The most important development areas located in the Western Ermont Valley, Sannois, Franconville or Taverny encourage the development of the new economic axis of the department.