St John WA has snapped up the Belmont property for $11.55 million, as part of its expansion plans.
The ambulance operator and health services provider bought the 191 Great Eastern Highway building earlier this year, in a deal brokered by Ray White Commercial WA's Brett Wilkins on behalf of liquidators EY.
A St John WA spokesperson said the group had grown considerably, with its integrated business St John Health operating six primary care locations across urgent care, general practice and dental.
Its most recent practice opened last month in Osborne Park.
"Acquiring the Pindan property offers ongoing cost savings by reducing leased buildings," the spokesperson said.
The asset includes a large office building comprising 3,316 square metres of office space and 626sqm of warehouse space.
St John has 1500 staff, which is triple that of when the 209 Great Eastern Highway headquarters opened in the early 2000s.
Ray White Commercial WA declined to comment.