Take M2 into Pretoria and follow as for N4 below.
Driving from the direction of Kruger Park/Nelspruit etc, the N4 goes directly into Hatfield (before Pretoria): on entering Hatfield (McDonalds restaurant signals your arrival!), turn left at the first traffic light into Gordon Street which becomes Duncan Street, at the 2nd traffic light turn left into Park Street. Go to the end of Park Street and turn left into Richard Street. Turn first right into Arcadia Street. We are half-way down on the left.
From R21 (Airport):
Take the R21 to Pretoria. Take the N1 Pretoria (OOS) turning. Take the M2 Pretoria turning and then follow the directions for the N4 above. The N4 and M2 are effectively the same road… also known as Pretorius Street in Pretoria!