From the Namur-Bruxelles Motorway, on entering Brussels on the flyover you will see on your right a "Carrefour" (big shopping mall). Take this exit and carry on to the traffic lights, turn left under the flyover, at the roundabout you go right and the first street right is Avenue de Beaulieu.
From the Liège-Bruxelles Motorway (E40), take the exit to the Ring of Brussels and follow left the signs Namur/Namen/Mons/Bergen until Carrefour Leonard (exit Namur). Instead of turning left to Namur, turn right to Brussels Centre and continue like in "From Namur-Bruxelles Motorway".
From Centre of Brussels, follow signs to Namur/Namen, which take you down Rue Belliard, go through two tunnels and exit on to Montgomery roundabout, take the first right on to Boulevard St. Michel, when you see Caserne Rolin on your right hand side, cross over tram lines and go straight on at traffic light. At next lights turn left into Boulevard du Triomphe, continue till next traffic lights and turn left at SECA station, carry on straight at next traffic lights into Avenue de Beaulieu.
From Airport, follow the Ring (R0) direction Namur-Luxembourg until Carrefour Leonard (exit Namur). Instead of turning left to Namur, turn right to Brussels Centre and continue like in "From Namur-Bruxelles Motorway".