We have engaged Brett & Bernie Duval building services on many occasions now over the last few years – from a large Extension Job to Kitchen & Bathroom Rebuild & smaller jobs in between: we have always been extremely impressed by their professionalism, courteousnature, easy communication & an amazing willingness to help & ensure high standards are met. They were extremely trust-worthy to the point where we would leave the house with them whilst we went out!

The teams of people they engage (whether it be a direct employee or a Sub-Contractor for a particular task) are all highly trained & very reliable with an extremely high standard of workmanship.

We now no longer have to worry about the quality of builder we are using – we know that we can trust Duval Builders with any job we need done & will be going back to them in the future for future projects - don't hesitate for a moment to use them!!

Dr M.Agarwal

We first heard about B&D Duval Builders through friends. At the time, we were considering the idea of purchasing a property with a reasonable sized backyard, and add a garden cottage, to take advantage of new government legislation. We approached the Duval Company and were struck by their friendliness and know-how of the building industry. It became obvious that they were capable of looking after all aspects of our property investment and the construction of a modern, two-bedroom cottage.

Whilst the construction was underway, under the leadership of Brett Duval, we were impressed by his organisation, planning and constant consultation; he included us in all facets of the project. Deadlines were strictly adhered to and the cottage was completed, ready for occupancy, in just over six weeks. In fact, it was in such demand that it was leased some weeks before completion.

We are ecstatic with the finished product, which came in right on budget. We are now earning $700 per week on our investment (house + garden cottage).

We wholeheartedly recommend B&D Duval Builders to you, and will not hesitate to use them in future projects. We will gladly talk to you about any aspect of our project.

Lesley & Glenn Sargeant

 I am a proud owner of a Federation Heritage workman's cottage.
Disaster struck when I found white ants had ravished the timbers, shock horror, what was I going to do?

It was early 1990"s when I was recommended to contact B. & D. Duval – Builders.

I was very emotional and apprehensive at the thought of builders coming into my home and tearing it apart. My fears were soon put to rest when the team arrived. Two bedrooms, lounge and hall all had to be gutted, new timbers replaced and put back to-gether again. B. & D. Duval were so considerate, supportive, clean and tidy while working that I was able to stay living in the house during the whole procedure.

I was impressed at their eye for detail, honesty and integrity, communication and trust is the key to the success of this business.
After I recovered from the white ant damage I went onto having a studio granny flat built, painting and wood rot repairs carried out. Twenty years have passed, good reliable, honest, clean service I would not have any other tradesmen on site.

"When you are on a good thing, stick to it."

J. Webb - Gordon

Contact Us

  02 9654 1241

Bernie: 0419 789 661

Brett:   0419 789 662

Steve:  0419 789 663

Fax:     02 9654 2383

Address: 18 Marieba Road Kenthurst NSW 2156

Central Coast Office:
110 Vales Rd, Mannering Park NSW 2259

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Why Choose Us?


• Over 40 Years Experience

• Fully Insured

• Fully Licenced #147764C

• Family Owned & Operated

• Granny Flat Specialists

• Renovations Specialists


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