Dornach is near Basle. You get to Ruchti-Weg 9 as follows:

By train
To Basel SBB (Swiss Station),
then Regional train in direction Laufen/Delémont to Dornach/Arlesheim

To Basel SBB,
then Tram Line 10 to Dornach terminal

To Badischer Bahnhof (Badener Station in Basle),
then Tram Line 2 to Bankverein or bus Line 36 to Dreispitz, change to Tram Line 10 to Dornach terminal
In Dornach take bus Line 66 to Obererli stop (or 15 min. from the station on foot)

By plane

- EuroAirport Basel-Mulhouse-Freiburg
Airport bus to Basle SBB station

- Zurich-Kloten Airport
Airport train to Basle SBB station,

then as by train, above

By car

Coming from France, Germany, Basle, Zurich, Berne,
Motorway in direction Delémont
Exit Reinach Süd to Dornach
Signs indicating Goetheanum
Dorneckstrasse, Brosi-Weg, Ruchti-Weg

If you're actually at the Goetheanum,
take the footpath via Albert-Steffen-Weg - 2 minutes and you're there.