140 William Street, Melbourne
| Company type | Office building |
|---|---|
| Industry | Commercial real estate |
| Founded | 1972 |
| Headquarters | Melbourne , Australia |
| Products | Office space |
140 William Street (previously known as BHP House) is a 41-level office skyscraper reaching 152 meters in height, constructed from steel, concrete, and glass, located within Melbourne's central business district. Built between 1969 and 1972, the architectural design was crafted by Yuncken Freeman, with engineering services provided by Irwinconsult and structural expertise contributed by Fazlur Rahman Khan of Skidmore, Owings & Merrill. The tower’s design drew inspiration from modern Chicago skyscrapers, with Khan offering guidance during a ten-week collaboration in 1968.
Upon its completion, BHP House held the distinction of being Australia’s tallest steel-framed structure and was the inaugural office building to adopt a “total energy concept,” producing electricity onsite through BHP’s natural gas supply. Functioning as the national headquarters for BHP, the building significantly contributed to Melbourne’s development as a prominent corporate centre.
140 William Street is officially recorded on the Victorian Heritage Register (Listing Number H1699) due to its:
- Architectural importance as one of Yuncken Freeman’s premier projects.
- Engineering advancements in steel and concrete construction that enabled open-plan floors now typical in high-rise offices.
- Historical significance reflecting Melbourne CBD’s evolution into a major commercial district.
History, Key influences and design approach
In 1948, BHP acquired the parcel at 498-502 Bourke Street for £47,250, initially intending to erect a 12-storey office building for its headquarters. Later, in 1964, BHP purchased the Menzies Hotel—Melbourne’s first luxury hotel—and demolished it in 1969 to make way for a taller tower. The removal of the hotel marked a pivotal moment in Melbourne’s urban renewal and was commemorated by artist Ernest Marcuse.
Construction on BHP House commenced in 1970, embodying a 'Modern Style' that championed steel use in Australian architecture and established national benchmarks for steel-framed building heights. Composed of steel, concrete, and glass, it became Melbourne’s tallest edifice upon completion. Its prominently expressed grid structure deviated from the curtain wall façades common in earlier decades, reflecting a sculptural monument concept inspired by Mies van der Rohe. Architecturally, BHP House is celebrated as a landmark achievement by Yuncken Freeman Architects for introducing innovative office building techniques such as flush glazing, minimalist interior design, and exposed structural bracing.
In 1970, Yuncken Freeman trialed design elements at their King Street offices. Under the guidance of structural engineer Fazlur Khan from Skidmore, Owings & Merrill, the building’s design integrated four principal components to generate a 'cantilever' effect and form a 'giant stiff structural tube': a steel-framed floor system, central core, steel-and-glass façade, and interconnecting steel trusses. Its foundations featured an advanced continuous-pour concrete raft. The use of open-web steel beams combined with lightweight concrete minimized floor weight, while cap and belt trusses channeled loads through both the core and façade—eliminating internal columns and allowing enhanced flexibility within interior spaces.
Additionally, the building incorporated a 'total energy system' that utilized BHP natural gas for onsite electricity generation. BHP House influenced subsequent office tower designs and led to amendments in Melbourne’s Town Planning Codes to permit greater building heights and increased floor space ratios. At the time of its completion, it ranked as Australia’s second tallest building following Australia Square.
Awards
- National Award for Enduring Architecture, awarded in 2005
- Maggie Edmond Enduring Architecture Award, received in 2005
- Bronze Medal, Victorian Chapter AIA, 1975
- Award of Merit, Victorian Chapter AIA, 1973