A renewed focus on sustainability and wellbeing has shaped an $8 million revamp of one of Adelaide's most recognisable office buildings.

The 15-level CBD tower located at 431 King William St has undergone a major upgrade for the first time in its 30-year history at the hands of owners Quintessential Equity, which purchased the asset from billionaire Con Makris for $43.1 million in 2018.

New features include ground floor and on-floor lobbies, state of the art end-of-trip facilities, renewed boiler and air conditioning systems and updated painting to the façade.

There have also been improvements to the building's environmental and sustainable capacity, with extensive engineering upgrades targeting energy consumption, air quality and waste management.

431 King William Street Adelaide. Source: Quintessential Equity

Now complete, it is anticipated that the building will achieve a net reduction of over 400 tonnes of greenhouse gas emissions per annum, the equivalent of removing 181 cars from the road each year.

Quintessential Equity General Manager of Asset Management, Noah Warren, said ensuring the building ran efficiently and delivered sustainable outcomes was crucial to protecting its longevity.

“We wanted to transform this highly visible building from an unloved and out of date asset to one that offered a sustainable and modern outcome," he said.

The refurbishment includes end of trip facilities. Source: Quintessential Equity

"By making a significant investment, we believe this iconic tower will set a benchmark of what can be achieved in terms of sustainable workplace design and engineering.

“To make office buildings viable and attractive in the long term, we need to guarantee that it serves the needs of its occupants and the environment, which in turn improves returns for our investors – it’s about delivering a benefit for the triple bottom line.”

Mr Warren said he expected there to be a renewed focus on healthy buildings in the wake of COVID-19.

“Healthy buildings are really going to be at the fore of the post-COVID world as tenants are going to need to feel safe and comfortable at the office," he said.

"As landlords, we need to lead the way.”

Situated on the city’s premier boulevard which runs through the centre of the CBD, 431 King William Street is currently 84 per cent leased with a total net lettable area of 11,700 square metres.

Trevor Boddy and Georgia Turner of Colliers and Andrew Bahr and Michael Pfitzner of CBRE have been appointed to complete the leasing.

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