(T) Alvik south exit closest to
(T) Hagsätra/Farsta strand/Skarpnäck
(rear/back end of the train if you come from the city)
up the stairs then up upwards left
to Tranebergsvägen and there
downwards right to Margretelundsvägen
by Tranebergs Fritidspark where you turn
left upwards until you get to Porfyrvägen 1
and follow that road until you get to
Porfyrvägen 25/Minnebergsvägen 18
...