Although Calder Stewart has expanded rapidly over the past 50 years, it remains a private company owned by the Stewart family. The construction of a new head office in Milton demonstrates the Stewart family's committment to the South Otago area.

The company consists of ten divisions:  

• Construction
• Development
• Roofing
• Steel
• Precast
• Distribution
• Forestry
• ReoXpress
• Thunder Bay
• Corporate Services

Calder Stewart can be found throughout New Zealand with offices based in: Invercargill, Cromwell, Queenstown, Wanaka, Milton, Dunedin, Timaru, Ashburton, Christchurch and Auckland.

Calder Stewart is committed to building core business by providing unique products and quality solutions that exceed our customer's expectations. Our business philosophy is to:

• Exceed customer expectations
• Develop our people 
• Maintain our family owned and operated culture
• Create and take opportunities that enhance our business through an entrepreneurial approach allowing us to adapt to the market and react to change
• Grow organically by developing products and strong customer relationships