About
A lifelong passion for architecture and building
Diamond and Lambert Builders (DNL) have long been highly regarded as one of the most experienced builders on Sydney’s North Shore and Northern Beaches.
Michael Lambert and David Lambert feel fortunate to have been business partners of a special kind – father and son who share a passion for building, architecture and family.
Michael completed his apprenticeship as a boat builder in the early 1970s for a leading Sydney company, absorbing the ethos of fine craftsmanship. Establishing DNL with John Diamond in 1975, Michael quickly gained the respect of many architects, proving a master builder and craftsman.
Michael’s son, David, completed his apprenticeship with a leading building company in 1989 and became site foreman. He subsequently studied to become a qualified builder and, after the retirement of John Diamond, joined his father in business in 2010.
Over the last 30 years David has been involved in projects as varied as new houses, apartment and house renovations and office fitouts making him well versed in all areas of the construction industry.
David’s passion is residential work undertaking both large and small building projects and consistently fulfilling clients’ dreams across the North Shore and Northern Beaches of Sydney.
Michael and David have always preferred a hands-on approach, providing consistent communication to clients. Anyone who has worked with this family team will attest to their genuine personal engagement and integrity. Their portfolio of exceptional work speaks volumes about their talent and commitment to their craft.
David has since taken over the running of the business, and feels very fortunate to have someone with Michael’s experience continuing to be available.
DNL continue to deliver the same personalised, genuine service that has been provided in the past and that the business has become known for over the last 45 years.
Diamond and Lambert Builders are members of the Master Builders Association and the Housing Industry Association.

Builders Licence No.16026
COVID-19 Adaptations
Over 45 years DNL has encountered many different obstacles and hurdles and, along with you, we are dealing with the global tragedy of COVID-19. With our priority on health we have adjusted some of our work practices and we continue to enjoy the delivery of our building services to our clients.
Where we have a distinct site we have implemented changes to our site induction, hand washing and cleaning activities and we do our best to maintain physical distancing while working and on breaks. For renovations where our clients are still living in their home, we are determining the protocols we will mutually use, including physical distancing, hand washing, and cleaning. We have also found that with clients working from home we have been able to make some timely decisions regarding their renovations!
Our clients say
Leanne B, St Ives
Once we understood the professionalism that the D&L team were bringing to our renovation, we requested to increase the scope to a much larger renovation and, as with everything, David was very accommodating.
Throughout the renovation D&L ensured that every detail was attended to with care and thoroughness. Our renovation presented some unique challenges, but the team completed the job with a smile, constant communication and always to our very high standard.
Marie C, Neutral Bay
David is a builder par excellence. His passion for achieving the very best for his clients is one of the reasons he was strongly recommended to us by friends. From conception to completion of our renovations, David was impeccable in his approach to service delivery. He is a builder of the highest integrity and brought to our renovation projects a team of highly skilled tradespeople who were true professionals in their fields.
We highly recommend David Lambert of Diamond and Lambert to anyone seeking to engage a builder with commitment, professionalism and integrity.
Grace Chen – C Squared Architects Pty Ltd
I have known and worked with David Lambert of Diamond & Lambert for more than 10 years. The team have proven themselves to be very capable and trustworthy. The feedback from my clients have always been very positive and I now regularly recommend David and his team to new clients.
I have continued to find David and his company fantastic to deal with. They have demonstrated a high degree of professionalism and extensive experience and capability in the residential construction industry.
Robert Grava – Burgess, Arnott & Grava Pty Ltd
I have known David Lambert on a professional level for the past fourteen years. I can honestly state from an engineer’s perspective Mr David Lambert is a very competent builder. He embraces all his projects with a great deal of vigour and prides himself on producing work of exceptionally high quality.
Christine H, Castle Cove
We are very pleased with the job undertaken by Diamond & Lambert Builders. The house looks so much better and it was completed with minimum fuss, in expected time frame and with no mess. Thank you very much and many thanks to everyone involved.
Liz & Pete, Lane Cove
We consider ourselves very fortunate to have found David and his team at Diamond and Lambert Builders. David takes our dreams as his own and works his build around it to realise what we are attempting to achieve. It needs to be significantly noted that the people David has working for him are outstanding. David’s innovation, experience, and quality workmanship has meant that challenges resulting from incorporating the old with the new have gone without a hitch. We would highly recommend that before you make your choice of builder speak with David first! You won’t regret it.