a modular office system for work stations includes at least one generally planar horizontal work top having a work surface and an opposed under surface . a plurality of legs are attached to the work top by a plurality of leg attachment structures . each leg attachment structure has a first side which is attached to the under surface of the horizontal work top and a second side which is attached to one of the plurality of legs . a horizontal connection member interconnects the leg attachment structure of one work top to a leg attachment structure of another work top . a vertical connection member is attachable to the leg attachment structure and includes a vertically extending portion for securing a panel thereto . the vertical connection member has a slot for passage of the horizontal connection member therethrough to permit attachment of one work top to another work top with the vertical attachment member attached to the leg attachment structure .