Fraser Bond are the leading lettings and property management agents for Lansdowne House - London W1J. Lansdowne House is an office development on the south side of Berkeley Square in Mayfair, London W1. The development will deliver 250,000 sq.ft. of Grade A offices and 14,000 sq.ft. of retail and restaurant space on the ground floor. Units in Lansdowne Row are purposely sized to attract smaller local retailers, serving the needs of residents and local workers. New amenities required by modern occupiers are introduced, including an outdoor rooftop terrace that incorporates greening and.