40 year reputation
Large Delivery Capacity
Management Team
Ben Duncan
Ben has over 20 years of experience in the construction and property industry. As the Managing Director of CJ Duncan, Ben has been instrumental in building the business into one of Sydney’s leading building companies.
Josh Black
Josh has over 20 years experience in construction and property development, underpinned by a background in architecture working with the likes of Lendlease and Toga Group. He has refined and strengthened the capacity of the business and its relationships with key clients in the Fit-out & Refurbishment sectors.
Ian Richards
Ian has 35 years of experience in the construction industry and over 10 years in the insurance and remedial building sectors. Ian joined CJ Duncan in 2009 as a senior estimator and was promoted to the role of Operations Manager in 2011. He is now the General Manager of the Remedial and Insurance divisions.
Greg Howard
Greg is the General Manager of our Queensland business, overseeing the delivery of significant projects for a range of commercial, government, strata, residential and insurance industry related clients. Greg is a licensed builder and has 30 years industry experience across various construction sectors.
Our Philosophy
Make it happen
We’re resourceful and reliable. If there’s a better way to do something, we’ll do what it takes to find it.
When we’re thrown curveballs, we’re proudly known for knuckling down, finding workarounds and solving problems to make things happen and keep projects on schedule. No fuss.
Play Fair
Say what you do and do what you say. We’re big on keeping commitments to our clients, and each other.
If we say we’ll do something, we won’t rest until we do. If there’s a problem we take personal responsibility and we put things right. Straight up.
Deliver Strong
The job isn’t over until it’s over. We stay focused, determined and professional at every stage of a project to ensure we get the job done right and never take our foot off the pedal.
We’re committed to finish just as strong as we start. Every time.
Our Values
We do what we say
At CJ Duncan, our word is everything. If we say we’ll do something, that’s precisely what we’ll do. From deadlines to budgets to paying contractors on time, what you hear is what you’ll get.
Built on Quality
Our reputation for delivering quality is everything. That’s why we never compromise or cut corners. We’re detail‑focused and use our market-leading skills to deliver projects to the highest possible level every time. We’re only as good as our last project, so it needs to be great.
We’re like a family
We’ve grown a lot. But we’ve never forgotten our family roots. After 40 years we’re still a tight knit business with a candid, people‑first attitude. From our clients and contractors to our in-house team, our success is built on a foundation of strong, personal relationships and respect.
Big results, low fuss
We make things happen. Maximum effort, minimum fuss. We take pride in our ability to knuckle down and get the job done. “Whatever it takes” has always been the attitude that drives us. If there is a smarter or more effective way to do it, we’ll find it.
Ben Duncan and his team provided us with a professional and flexible approach in a non-adversarial manner. Their ability to "think outside the square" in tackling complex issues has managed to ensure our targets were met.
Nick Marston
Director, Project Management
Altus Expert Services, Altus Group
CJ Duncan is very professional to work with. Their management and site teams have a thorough knowledge of construction methods and are always fair and reasonable to deal with. We recommend CJ Duncan because of their level of understanding of complex remedial works and there experience with live strata environments.
Ian Prentice
Managing Director
Core Project Consulting
McLarens has enjoyed a successful working relationship with CJ Duncan for many years. The duration of the relationship standing as testimony to this. The quality of workmanship, professional approach and technical ability demonstrated by CJ Duncan is of the highest standard.
Gary Vaccaro
Executive Adjuster
McLarens
CJ Duncan performs at a very high level and their work is done with great care and quality. We have used them many times and continue to engage them for works where a high level of quality is critical.
Dennis Stephenson
Managing Director | Diagnostech
Over a long and sometimes difficult project, Brent from CJ Duncan was always professional in his approach to the works, and on numerous occasions, he demonstrated a thorough understanding of the needs and requirements of some demanding residents while still managing to “get it done”.
Rod Pyne
Building Manager | 1 Lauderdale Avenue, Fairlight
CJ Duncan completed a cladding replacement project for Centuria at St Leonards where I was the client representative. The work they did was of a high standard and with good attention to detail. I would be happy to recommend the CJ Duncan team for cladding and remedial projects.
Hannah Knight
Development Manager | Centuria Capital Limited
I have worked with CJ Duncan on various cladding replacement projects. CJ Duncan is an experienced team, dedicated to providing a great outcome for the client. I believe CJ Duncan are leading the industry in cladding replacement and rectification. These guys go the extra mile.
Johnny McGirr
Director
Cladding Compliance Australia
I just wanted to write a quick note to say thank you to you and your team for the completed works at Mantra on Kent. The team were very professional and completed the job on time are very happy with the final works.
Emma Soutter
Area General Manager - NSW | Mantra on Kent
CJ Duncan was appointed by Caroma to deliver their Flagship Storeroom at Collins St Alexandria. The team assisted during preconstruction by proposing value engineering options in order to meet the client’s budget requirements, and collaborated with the design team to ensure the desired outcome was achieved for Caroma. They delivered to a high quality standard in line with our expectations.
Kate Downing
Caroma
I want to thank you for delivering our job before Christmas on 1-7 Arthur Avenue,Cronulla, for the quality of the workmanship and your cooperation along the way.We are very happy with the outcome. I will recommend CJ Duncan to anyone needing remedial work and I can see now why Paul Ratcliff recommended you to us. I personally thanked Charlie yesterday for the outstanding job he has done. Charlie has been on the site from the start. He and his workers are the neatest and most helpful tradies that we could have hoped for and very much appreciated by the residents of this block.
Craig Smith
Secretary | Strata Plan 32607
I have worked with CJ Duncan for many years and on various remedial projects. They are professional, friendly and focused on solving building problems. They have the right attitude to making sure that the work is fit for purpose and executed to a high level with care and skill.
Paul Ratcliff
General Manager | Building and Waterproofing Inspections
TM Insights worked closely with CJ Duncan in an ECI engagement for the Caroma Flagship Retail Store, Collins St, Alexandria. The challenges associated with complex staging works and site constraints were very well managed – The final product looks fantastic.
SAM DELIOS
TM Insights
Thank you very much for assisting us with not only replacing the combustible cladding from our building, but also your assistance with the complicated council sign off process. Additionally, thank you for your patience, help and support. You cannot possibly imagine the relief that this closure brings me and the owners group.
Darren Windus
OC Chairman, Marquis Apartments – Killara
