Address:  Whanganui

Cost: $50 million

Client: Whanganui District Council

Completed:  2024

Completed in late 2024, the Te Whare o Rehua Sarjeant Gallery redevelopment involved the meticulous restoration and earthquake strengthening of the 105-year-old heritage-listed building, alongside the construction of a new, architecturally significant extension. This major project, led by McMillan & Lockwood, has doubled the gallery’s exhibition capacity and provided state-of-the-art storage for its nationally significant collection of over 8,000 artworks. Work began in 2019 with the extension building and expanded to include the heritage gallery and a connecting link structure. The new build, designed to the highest importance level, utilised traditional construction methods including extensive in-situ concrete, and required excavation to depths of 4.5 metres. Challenges included working with inconsistent historical documentation, underpinning shallow original foundations, and managing strict HVAC and heritage requirements—all while maintaining the integrity of the historic dome and Oamaru stone façade.

Throughout the complex four-year build, McMillan & Lockwood overcame additional obstacles such as Covid-19 disruptions and subcontractor insolvencies, even employing HVAC staff directly to keep the project on track. True to their values, the team prioritised local subcontractors to support the Whanganui community and worked closely with iwi representatives to respect cultural and archaeological discoveries made onsite—including military artefacts and a time capsule hidden in the gallery walls. A highlight of the finished project is the carved waka beneath the bridge that links the old and new wings—an iconic symbol requiring delicate cultural coordination. Now complete, the gallery features modern facilities including event spaces, a classroom, café, and shop, all anchored by the newly named Te Pātaka o Tā Te Atawhai Archie John Taiaroa. The project stands as a landmark achievement and a proud testament to the gallery’s future as a national treasure and cultural beacon.