Xenon have won the confidence of the Building Management Team at Berkeley Square House with the award of the cleaning & support services contract. In the heart of Mayfair, is without doubt one of London’s most sought-after locations. Its proximity to some of Europe’s finest restaurants and hotels, together with world class shopping facilities is unrivalled. Berkeley Square House dominates the eastern side of Berkeley Square and offers a truly international profile due to its extensive range of blue chip occupiers.