Johnstone Callaghan Architects is an award-winning studio that creates residential and commercial spaces that champion functionality, form, and detail.

The design-led practice was formed in 2019 by Prue Johnstone and Mike Callaghan over a shared vision of bespoke, considered and enduring architecture. Its small team of like-minded architects and designers is based in Ōtautahi, Christchurch, with a diverse portfolio of projects across Aotearoa.

Combining experience and ingenuity with in-depth client collaboration, JCA delivers responsive architecture that exceeds expectations.
Our Team
Mike Callaghan — Principal, Architect
Prue Johnstone — Principal
Tim Dewar — Architect
Claire Krejcisz — Graduate
Haidee Woods — Graduate
Dayna Helem — Graduate
Fletcher Allan — Graduate
Sophie Tanner — Administration
■     Awards
Te Kāhui Whaihanga
New Zealand Institute of Architects
Low Slung
2025
Builders Block
2025
Lighthouse
2025
Refined Lines
Shortlist — Interiors, Canterbury
2025
Spencer Bower House Alterations
Shortlist — Alterations and Additions, Canterbury
2025
The Studio
2024
Akin
2024
Redcliffs Medical Centre
2024
Garden House
2024
Triptych
2023
Winner — Resene Colour Award
2023
The Cowshed
2023
The Cabin
2022
2022
Russell's Cabins
2022
Doubles
2022
Winner — Resene Colour Award
2022
Recycle Boutique
2022
Winner — Resene Colour Award
2022
Best Awards
Redcliffs Medical Centre
2024
Doubles
2024
Split Hip
2024
Garden House
2024
The Studio
2024
Triptych
2023
The Cabin
2022
Interior Awards
The Cabin
2022
Timber Design Awards
Russell’s Cabins
2023
New Zealand Commercial Project Awards
Redcliffs Medical Centre
2025
■     Press/publications
The Cowshed
2023
The Cabin
2022
Henderson House
2024
Russell's Cabins
2022
2023
2023
2022
Triptych
2024
Doubles
2021
■     studio@jc-a.co.nz

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+64 3 365 0413

66 Gloucester St, Level 2
Christchurch 8013
■     studio@jc-a.co.nz
66 Gloucester St, Level 2
Christchurch 8013