Home   »   Portfolio   »   Commercial   »   Green Square North Tower

Green Square North Tower

Commencement Date: January 2006
Completion Date: December 2008
Client: Property Development (Leighton Properties) Design & Construct (Leighton Contractors)
Developer: Leighton Properties
Architect: Cox Rayner
Builder: Leighton Contractors
Capital Value: $94 Million
Building Owner: ISPT

515 St Pauls Terrace, Fortitude Valley, Qld, Australia
ESD, Mechanical, Electrical & BMU Consultants

Green Square North Tower, valued at $94 million is in one of Brisbane’s largest mixed use corporate office parks. The building offers tenants 23,500m2 of A-Grade office space spanning over 12 levels, 600m2 of retail space and basement parking for up to 154 cars.

The overall vision was to develop Green Square North Tower as a market leader in Ecologically Sustainable Development (ESD). The Floth project team looked at utilising sustainability rating tools such the Green Building Council of Australia (GBCA’s) Green Star program and the National Australian Built Environment Rating System (NABERS) office energy rating.

Initially a 5 Star Green Star Rating was desired, however after construction commenced the client raised the bar requesting the Floth design team achieve a 6 Star Green Star Rating. Green Square North Tower went on to become Queensland’s first GBCA 6 Star Green Star Office As-Built V2 rated commercial building.

Floth considered a number of design options, however Floth’s co-generation technology proved to be the most space and cost efficient option to reach the clients’ green targets.

The inclusion of the large scale gas powered co-generation (775kW) plant into a commercial office building signaled an Australian first for a commercial development. The co-generation technology works by recycling waste heat from power generation to chill water for the building’s air-conditioning system.

Floth has achieved a whole of building (Base Building & Tenancies) emission rating of 129kg CO2/m2 per annum, which is the lowest emission figure for a building of its size in Australia. The North Tower generates 770kW of electricity as a result of the co-generation plant. To generate the same amount of peak electricity using solar panels, an area three to four times the size of the building’s available roof would have been needed.

Floth’s primary objective was to reduce the buildings’ carbon footprint by adopting good design principles. The gas powered co-generation plant incorporates the world’s best practice system of independent energy generation.

Green Square North Tower has become the first commercial building in Australia with an operational co-generation plant to be awarded a 5 Star NABERS Energy whole building rating.

Floth’s Award Wins:

Finalist in the Premiers Climate Smart Sustainability Awards 2010 in the Innovation in Climate Smart Technologies Award.

Gold Award of Merit at the Consult Australia Awards for Excellence 2009 in the Building Services category.


Ph:  +61 2 9406 4555
Fax: +61 2 9411 8460

Email: syd@floth.com.au


Ph:  +61 7 3513 8000
Fax: +61 7 3252 2499

Email: bne@floth.com.au


Ph:  +61 3 9448 8755

Email: mel@floth.com.au


Ph:  +61 8 6162 2396

Email: perth@floth.com.au


Ph:  +62 21 719 1044
Fax: +62 21 719 7812

Email: floth@flothindonesia.com