40 year reputation
Large Delivery Capacity
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.
Sinclair is an experienced executive with over 20 years commercial experience in fire protection, security, and banking and finance. Sinclair is a lawyer by training and was previously at Westpac Banking Corporation for 12 years, where he held a number of senior management roles.
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 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.
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.
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.
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.
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.
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.
Area General Manager - NSW | Mantra on Kent
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”.
Building Manager | 1 Lauderdale Avenue, Fairlight
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.
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.
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.
Core Project Consulting
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.
Managing Director | Diagnostech
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.
Cladding Compliance Australia
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.
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.
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.
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.
OC Chairman, Marquis Apartments – Killara