Cell towers in Chatou (Yvelines)

Masts stand at 2 rue du Capitaine Guynemer 78400 Chatou, Les Sabinettes, 37 Avenue du Maréchal Foch, 53/63 avenue du Maréchal Foch, 46 place Maurice Berteaux and 1 et 3 allée Circulaire.

Over the past 12 months ANFR recorded 8 new systems here. ANFR has approved 2 new sites that are not live yet, plus additions on 3 existing masts. New: Free Mobile (4G and 5G, including 5G at 3.5 GHz) at 13 à 15 Avenue Claude Monet and Orange (4G and 5G, including 5G at 3.5 GHz) at 70 Route des Carrières-Sur-Seine. 8 Bouygues Telecom 5G transmitters are listed as technically operational — installed, but not yet declared commercially in service.

Systems from 1998 are still on the register. Bouygues Telecom switched on the first 5G here in November 2020; Free Mobile followed in December 2020, SFR followed in March 2021. 2021 was the busiest year, with 21 new systems, most of them 5G.

Most antennas sit on rooftops (12 of 12), so heights stay modest; the tallest support is 31 m at 53/63 avenue du Maréchal Foch.

On 3.5 GHz, the fastest 5G band: Free Mobile on all 5 masts, Orange on all 5 masts, SFR on all 5 masts and Bouygues Telecom on 3 of its 5 masts.

Nearby, Croissy-sur-Seine (1.9 km to the south-west) has only 6 masts.

Only one mast carries all four networks.

Among the 62 Yvelines towns with at least five masts, Chatou ranks 21st by mast count. With 12 masts for 30,598 residents, or 4 per 10,000, it has fewer masts per inhabitant than the median for those towns (7).

At 5 km² with 30,598 residents, the commune is dense enough that most antennas sit on rooftops rather than pylons. It is part of the CA Saint Germain Boucles de Seine intercommunal grouping.

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