About Interlock Construction

History & Introduction

We are a Christchurch-based construction company that provides commercial and residential building services throughout New Zealand. Directors John Stewart and Justin Kent have a wide range of industry experience and knowledge, and take pride in delivering construction projects on time and on budget for clients while maintaining high standards of excellence.

Through our extensive experience, we know the importance of keeping our clients well informed throughout the construction process from start to finish, to ensure a positive result. We place a high emphasis on regular communication and updates to ensure that timeframes are met, client changes are made in advance, costs are reviewed and managed, and most importantly that our clients are happy with how their project is tracking. 

John Stewart

Managing Director

John has over 45 years’ of experience both as a carpenter and as a business owner. He has completed a number of complex projects both nationally and internationally. As a result, his experience and knowledge is invaluable, and helps with problem solving when completing challenging projects. Over the years, John has also demonstrated his ability to meet the rigorous and changing demands of an
ever–evolving construction industry.


Justin Kent

Managing Director

Justin started out as a labourer learning the fundamentals of construction before undertaking tertiary education and returning to the industry as a Junior Quantity Surveyor and Project Manager. He’s continued to develop his skills and knowledge over the past 15 years, in the building industry managing multimillion dollar projects from concept stage to final completion. He has worked alongside John for over a decade and their different areas of expertise complement one another. 

If you would like to discuss a construction project or obtain a competitive quote please contact us. We would love to have the opportunity to work alongside you and provide you with a building that you can be proud of.