Specialised fit-out & refurbishment projects demand specialist skills. CJ Duncan has carved an enviable reputation for excellence, delivering brilliantly‑crafted solutions.


Fast, reliable and ever-resourceful.
Remedial and Insurance work is what CJ Duncan is built upon, and we still do it better than anyone else.


With decades of experience, we have the knowledge to ensure the right solution for your building including replacement of defective & combustible cladding.

What our
Clients Say
About Us

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

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

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

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

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

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

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 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

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 worked closely with the CJ Duncan team on the rectification of the Zenix Residential Complex at Alexandria. It was delivered by a team with a positive attitude who always presented well, and managed themselves and their subcontractors professionally.

Danielle Hynard
Jackson Teece

Issues were never brought to me without a solution. The team was always available, responsive and nothing was too hard or a bother for them. They were fantastic to deal with.

Geicon Construction Management

CJ Duncan’s support and dedication was outstanding. The team repeatedly demonstrated their willingness to go out of their way to ensure they delivered the outcome required. The support on site was a stand-out point for CJ Duncan. They did a great job managing tradesmen, owners and tenants to ensure all works were completed to a high standard.

Masters Management Australia

I would like to call out the professionalism and expertise that was demonstrated consistently by CJ Duncan on our project to ensure the owners requirements were not only met but exceeded.

Owners Corporation Pavillions Glebe

I honestly believe that CJ Duncan’s attitude to ensuring a projects design intent is delivered is unique to the building industry. The Lend Lease Innovation Lab project has achieved excellent management feedback. I am pleased to be a referee for CJ Duncan.

Innovation Manager | Lendlease

I have worked with CJ Duncan many times over the last 10 years and found them to be an exceptional company. They are a highly focused team and have a genuine commitment to quality and cost.

Project Manager | Thelem Consulting

CJ Duncan’s proactive, solution-focussed approach throughout the Lend Lease Display Suite project ensured that Lend Lease’s design vision was realised in every detail. The team was responsive, creative and, above all, added value to the process at every stage.

Phill Johnston
Delivery Manager NSW Apartments

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.

TM Insights

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

I would thank the CJD team for the prompt and efficient manner that the restoration works have been carried out. All the tradesmen were polite, organised and completed their respective tasks in a timely manner.

Peter and Lyndall Lee