
Building Strong
We are a specialist building contractor experienced in remedial & insurance, facade solutions and fitout & refurbishment.

Combustible Cladding
With our innovative approach to cladding remediation, CJ Duncan is the best choice to rectify your building.

Fitout & Refurbishment
Specialising in fitout, refurbishment and upgrade projects, CJ Duncan are a market leader in delivering highly finished and complex projects.

Facade Solutions
Whether it’s protecting your facade for safety & peace of mind, or undertaking a major upgrade to modernise & future-proof your building, we’ve got solutions to suit.

Remedial
CJ Duncan is a remedial specialist focused on high quality repairs and maintenance on commercial, residential and industrial assets.

Insurance
Providing fast and effective building repairs to the insurance industry. For over 40 years, CJ Duncan has successfully serviced the insurance sector including major insurers, brokers and loss adjusters.

FIT-OUT &
REFURBISHMENT
Specialised fit-out & refurbishment projects demand specialist skills. CJ Duncan has carved an enviable reputation for excellence, delivering brilliantly‑crafted solutions.
FACADE
SOLUTIONS
CJ Duncan has been working on building facades for decades, including replacing and repairing. We have the experience to ensure the right solution for your building including replacement of defective & combustible cladding.

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
Johnny McGirr
Director
Cladding Compliance Australia

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
Nick Marston
Director, Project Management
Altus Expert Services, Altus Group

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
Kate Downing
Caroma

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
Ian Prentice
Managing Director
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.
Dennis Stephenson
Managing Director | Diagnostech
Dennis Stephenson
Managing Director | Diagnostech

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
Darren Windus
OC Chairman, Marquis Apartments – Killara

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
Paul Ratcliff
General Manager | Building and Waterproofing Inspections

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
Craig Smith
Secretary | Strata Plan 32607

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
Emma Soutter
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”.
Rod Pyne
Building Manager | 1 Lauderdale Avenue, Fairlight
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
Hannah Knight
Development Manager | Centuria Capital Limited

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
Gary Vaccaro
Executive Adjuster
McLarens

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
SAM DELIOS
TM Insights