The building which eventually gave the name to the area was constructed in 1860. At this time the first land war in Taranaki was escalating and there were fears it would spread north and so a defence system for Auckland was actioned. A 12-acre site was chosen, bordered by Esplanade (Endeavour Street), Gilfillan Street, Wynyard Road (Blockhouse Bay Road) and Boylan Street (Wade Street). The actual Whau Blockhouse was located on what is now No. 8 Gilfillan Street.