Cell towers in Villejust (Essonne)

16 supports are declared underground, in a gallery or a tunnel. For questions about exposure, see the exposure guide.

Declared supports include 16 underground or tunnel sites and 1 camouflaged "tree" pylon.

Masts stand at Complexe Sportif de la Poupard, Tunnel de Villejust and Route de Villebon.

ANFR has approved 2 new sites that are not live yet. New: Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 59 Rue Fretay and SFR (3G, 4G and 5G, including 5G at 3.5 GHz) at 2 Avenue des Deux Lacs. 1 Bouygues Telecom 5G transmitter is listed as technically operational — installed, but not yet declared commercially in service.

Fast 3.5 GHz 5G is declared by SFR alone, on 1 of its 17 masts. No 3.5 GHz from Bouygues Telecom here, only 2100 MHz. 5G is on 11% of masts here, against 88% across Essonne towns with five or more masts.

The tallest structure is a 34 m pylon at Ech ZA de Courtaboeuf. The median is 7 m, slightly below the Essonne median of 26 m.

Systems from 2001 are still on the register. Local 5G started with SFR in December 2021; Bouygues Telecom followed in November 2023. 2023 was the busiest year, with 54 new systems, most of them 4G.

Among the 60 Essonne towns with at least five masts, Villejust ranks 11th by mast count. With 18 masts for 2,558 residents, or 70 per 10,000, it has more masts per inhabitant than the median for those towns (7).

Nozay lies 2.7 km to the south and has only 6 masts.

Colocation covers 16 supports.

2,558 residents over 5 km²: supports are mostly pylons, not rooftops. It is part of the CA Communauté Paris-Saclay intercommunal grouping.

Figures above cover installations declared to ANFR as in service or technically operational, as of October 2026; approved projects are not counted.