The run and the load, both
Two things drive a West Linn install: how far the power travels, and whether your service can carry the load. We size the conductor for the distance, and our guide on wire size and voltage drop explains how run length drives it, then we run a load calculation on the panel. Where an older home needs more capacity first, a West Linn panel or service upgrade runs $2,500 to $7,500; our West Linn panel upgrade page has the detail.