IAG NZ Ltd & Goodman Property Trust are the first to achieve a 5 star NabersNZ whole building rating for their Christchurch office at 14 Show Place, Addington.
The sustainability-focused refurbishment of 7000m² of office space on 6 floors in 2 adjoining buildings was prompted by earthquake remediation work & a pending lease expiry.
NabersNZ measures office building energy use. Nabers – the national Australian built environment rating system – was adopted in 2013 for New Zealand. The 2 trademarks are held by the New South Wales state government and the New Zealand scheme is licensed to New Zealand’s Energy Efficiency & Conservation Authority. The NZ Green Building Council administers the programme.
Goodman portfolio manager Anna Lough said the project aimed to reduce operational costs, reduce the buildings’ carbon footprint and create a healthier environment for staff. Key sustainable features include a variable refrigerant flow (VRF) HVAC system with heat recovery, CO₂ sensors, LED lighting, daylight harvesting & occupancy sensors.
Ms Lough said: “Goodman undertook the project because we saw it as a great opportunity to work collaboratively with one of our largest office occupiers in New Zealand. We were able to refurbish and add value to our asset as well as retain a quality customer and secure them a long-term lease.”
The project was planned & designed in 3 months, and allowed 6-7 weeks to strip & complete each floor while other floors remained occupied. The entire project took 10 months to complete.
IAG’s national property & administration manager, Tim Griffith, said: “The project has shown us that energy-efficient improvements can be made in existing buildings – as an example we’ve easily retrofitted LED lighting with up to 20% savings in lighting energy, with a 2-3-year payback. Air-conditioning is always the largest component of energy use in a building, so it’s worth seeking specialist advice from engineers to ensure the correct equipment is installed and you receive the best energy efficient outcomes. We are seeing a 40% reduction in energy consumption in the building despite an increase in our workforce.”
And Green Building Council chief executive Alex Cutler said: “We’ve found that the buildings with the best energy performance are those where tenant & owner work collaboratively. Congratulations to IAG & Goodman, who have proven that working together can achieve market-leading results that benefit both parties.”
The NabersNZ rating was carried out by Vanessa McGrath from TM Consultants.
The IAG building’s NabersNZ rating was achieved while under the management of Maori Hill Property Ltd, which has managed the property following its sale to a group of investors last November.
Link: Video case study
Attribution: Green Building Council release.