Val d’Oise is home to a range of complementary industries and other business activities, based in a variety of established and emerging centers.
Opening of the A 16 motorway has fueled rapid growth in industrial areas along the RN1 highway between Deuil-la-Barre, Domont and Montsoult, close to attractive town centers.
Persan-Beaumont, with its rich industrial tradition, is a source of balance for economic life in the northwest of département, not only through its established metallurgy businesses but also through a variety of advanced technology companies.
Sites along the Seine near Argenteuil-Bezons, Cormeilles, Herblay and La Frette are ideally located, offering rapid access to Paris and La Défense. Argenteuil-Bezons is home to aerospace, mechanical engineering and a variety of high-tech companies, as well as fine chemicals and plastics processing operations. The new Seinergie business park, served by a major motorway, confirms the sucess of earlier ventures that include "Harmoniques", "Algorithmes" and "Thales".
The Montmorency valley is best known as a prime residential area, but it also the site for numerous smaller businesses involved in advanced technology sectors, many of them sub-contractors to the mechanical engineering, plastics and electronics industries. Plans for larger industrial areas in the west of the valley with bolster the département’s position as a base for services and offices.