A new commercial office tower at 40 Mount Street in North Sydney is leading the
way in sustainable, yet stunning design. The Ark is the first high rise building
in New South Wales to be certified Six Star Green Star for Office Design V2 and
developers, Investa, are also targeting five star NABERS energy rating.
Designed by architects Rice Daubney and built by Thiess, the Ark features a huge
glass wing which appears suspended in front of the southern façade. This lets in
light and takes advantage of the uninterrupted panoramic views across Sydney
Harbour to the city.
Inside, tenants are delighted with the large floor plates, natural light and
energy efficiency. The building was 85% leased at completion, anchored by
Coca-Cola Amatil and Vodafone Hutchison Australia.
“A key feature of this environmentally sustainable building is the
implementation of a tri-generation plant,” Hastie Australia Project Manager,
Paul O’Reilly said. “The plant is primarily made up of a 770 kWe reciprocating
gas engine and a 650kWr absorption chiller which allow three outputs –
electricity, heating and cooling. It produces about 80% of the building’s
electricity requirements as well as producing domestic hot water for bathrooms
and kitchenettes, and chilled water for space air conditioning throughout the
The mechanical services were designed and constructed by Hastie Australia. Paul
said, in keeping with the sustainable design, MEPS2 High Efficiency motors were
incorporated into all Fantech fans throughout the job with their operating life
being no less than 100,000 hours.
The green design also incorporates facilities for cyclists, recharging bays for
electric and hybrid pool cars, as well as stormwater and greywater recycling
“The old site of the North Sydney Telephone Exchange has been dramatically
transformed, but its history is not forgotten with the building’s forecourt
featuring major works from leading Australian artists linking the old with the
new,” Paul said.