Donovan Group is a successful family owned company based in Whangarei and with a range of manufacturing assets, including a nationwide steel building franchise network. The company recently received the Supreme Award at the 2015 Westpac Northland Business Excellence Awards. Donovan Group also received the Eroad Excellence in Business (Large Business) Award and the Northland Inc Innovation Award.


The Donovan Group is driven by an experienced and professional team, who are proud to lead New Zealand’s modular construction steel manufacturing industry.


The Donovan Group had its humble beginnings in the late 1960s when Graham Donovan established his first company, Donovan Manufacturing.

Graham was particularly interested in new computerised machine technology (CNC) and Computer Aided Design (CAD) technology to
enhance his growing business.

In the early days Graham built many of his own processing machines. His innovations were years ahead of many of the process systems and machines currently available today.

The business expanded to include a range of products, which were manufactured under licence. Graham subsequently opened one of the first computerised plate and sheet processing facilities in New Zealand.

Brett Donovan, also a qualified engineer, joined the Donovan Group team in 1992 and together they began designing and manufacturing custom-built components for the construction, transport and electrical industries. Around this time the company also began manufacturing construction products for their New Zealand customers and Australian counterparts.

In 2005 Kyle Donovan joined the company, bringing with him a background in marketing and finance. Together with Brett, he began to concentrate the company’s attention entirely on the construction sector, with a specific focus on the development of a computerized construction programme that could pre-engineer steel buildings.

With the software in place, the brothers established the Coresteel Buildings network as a distribution base which now features 24 distributors nationwide, a professional engineering/detailing hub and a Coresteel management/marketing team.

Donovan Group continues to invest heavily in software development within the building industry in a bid to produce the most cost-effective and well-engineered buildings in the Australasian market.

The Tapered Box Beam is the latest structural innovation, released in 2013 and jointly patented with New Zealand Steel and BlueScope. The Tapered Box Beam system contests conventional construction with a cost-effective locally-designed and manufactured solution.

Tim Williams and Jonny Hendriksen invested in the Donovan Group in early 2015, with Tim joining the board of directors. Following many years running a successful IT platform business in Japan, Tim returned to New Zealand to discover the price of building costs in his home country were higher than they should be. Tim and Jonny developed Modern Building Products and due to a mutual strategic direction with Donovan Group, decided Coresteel Buildings was a suitable vehicle to make change in the New Zealand and Australian industries.

The company recently received the Supreme Award at the 2015 Westpac Northland Business Excellence Awards. Donovan Group also received the Eroad Excellence in Business (Large Business) Award and the Northland Inc Innovation Award. Read more.


As a New Zealand owned and operated company, Donovan Group is committed to being involved in our communities through a range of community activities and events.

Rugby sponsorship

Donovan Group is proud sponsors of the Northland-based Taniwha team. Through its distributor brand Coresteel Buildings, Donovan Group is the back-of-shirt sponsor for the Northland team, who compete in the annual Mitre 10 Cup.

Sponsorship of the Northland Taniwha has provided Donovan Group an opportunity to celebrate the company’s success over recent years and also put back into the community where the Donovan family grew up. View Coresteel’s Northland Rugby image gallery here.

Jim Carney Cancer Treatment Centre

Donovan Group was proud to donate an American Barn building which was auctioned to raise money for a new cancer ward in Whangarei. The funds raised contributed to a grand total of $3m which saw the Jim Carney Cancer Treatment Centre become a reality in November 2014.

Whangarei Amateur Swim Club

Donovan Group supports up and coming swimmers from the Whangarei district to compete in regional and national competitions.

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