About Us

BDDS is an Australian company created to provide superior building services to homeowners and property developers across NSW.

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Our Services

We work with our clients and design their specific project whether it is a Residential, Commercial or Industrial development

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Our Projects

Building Design and Drafting Services Projects – This page us currently under construction.  Should you wish to discuss what we are currently working on please give us a call on 02 9980-2163.

Building Design & Drafting Servicesx

Residential Design & Drafting

At  Building Design and Drafting Service we provide custom design solutions to residential requirements whether it be:

  • New Homes
  • Alterations & Additions
  • Granny Flats
  • Dual Occupancies
  • Multi-unit Development

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Commercial Design & Drafting

At BDDS we prepare documentation and approvals for a variety of commercial developments including:

  • Retail Outlets
  • Restaurants
  • Office Fitouts
  • Office Buildings
  • Childcare Facilities
  • Education Facilities
  • Health Facilities
  • Caravan Parks & Boarding Houses

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Industrial Design & Drafting

Building Design & Drafting Services do work on variety of industrial projects including:

  • Coolroom Facilities
  • Warehouses
  • Marine Structures
  • Factory Units
  • Carpacking Facilities

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The Advantages Of Using BDDSx

Personalised consultation

We provide personalised service, we are here to listen and help clients realise their dreams.

Trusted Company

We are members of the Housing industry association (HIA) and the Building Designers Association (BDA)

Good Preparation

One stop shop from planning & design to preparation of all documentation including Architectural and Structural & fitout drawings organising Council approvals and coordinating with other consultants as required.

Qualified Staff

All staff are qualified in their respective fields and are passionate about their work.

Diversity Experience

BDDS & previously Tregarthen Services Pty Ltd has over 17 years experience in the field of Building Design & Drafting


Hours of Works


Projects Complete


Slice of Pizza


Cups of Coffee

Mission statementx

Provide plans and documentation that are compliant with Australian standards as well as standards and ethics required by the Australian Industry Association (HIA) and the Building Designers Association (BDA) both of which we are members.

To provide a high quality comprehensive service to our clients.

To listen to our clients needs and respond in a timely manner and keep our clients informed at all times

Provide Designs that meet their expectations

Building Design Trends 2018 x

With home owners looking for inspiration everywhere these days it can be hard to pinpoint one style and design for your home.

Guaranteed To Deliver x

Clients trust BDDS to design and plan their next big or small project, so to ensure they are happy and continue to work with us we ensure we put our best foot forward and get the job done right.

What our clients say x

Ron James from BDDS was highly recommended. We knew instantly that he understood we wanted to make a silk purse out of a very old pig’s ear! And he asked for a wish list. And not only did he “draw plans” – his input on the way we should go – incorporating things we never thought possible – wrapped in a common sense, economical way , was just incredible.We are not the easiest customers, and our home needed a lot of help, but working with a firm like BDDS we were blown away with their customer service and work ethic. Nothing was too much trouble, no question was left unanswered.I never had to ring and ask what was happening, Ron attended to all DA requirements for Ku-ring-gai, pretty much hand holding us the whole way and attending all meetings with us. Susanne Hopcroft
I have engaged Owen and his team to design several renovations of our home over the years as I found Owen to be both an excellent listener and able to devise good design solutions that met our needs. His manner and ability to comfortably liaise with builders, planners and other authorities on our behalf was invaluable and really helped in the smooth running of each project. I highly recommend BDDS and look forward to working with the team again on our new home! Bronwyn Hunter

A Good Yarn

It is with great pleasure that I write this reference for BDDS. From the outset all the staff were friendly, professional and open to my ideas and yet they won me over with their own brilliant concept. Owen and Ron took the stress out of dealing with certification, council, engineering, the fire authority and neighbours. Every suggestion I had was met with willingness to see if it could work and alternatives were presented tactfully and respectfully. This is house number (at least) 4 for us in the renovation game and so I knew what to look for when needing concept ideas and a good job done. We had a particularly tricky section of our odd shaped house and a very small budget. BDDS presented me with the perfect solution, incorporated my tweaking, had the plans drawn up, everything certified and approved and hand delivered to my door within the shortest time frame imaginable. I could not recommend them more highly and have enjoyed this process more than any other project I've worked and on. They are a fun, friendly, dedicated and very experienced group. Thankyou BDDS for everything. Regards Susan McManus


We engaged BDDS to assist us navigate the process of designing and gaining Council DA approval for a new carport. They clearly outlined the costs and requirements from the start to make this happen. Ron was great in terms of communicating every step of the way explaining all the requirements, adjusting the design, documentation and liaising with Council. We are now ready to build with everything we need and we thank BDDS for a good experience! Susie

Pennant Hills

John and I were very appreciative of the guidance and advice when planning our addition with BDDS. They assisted us in every way from our original ideas through to the lodgement of our DA. Ron James was amazing! Di Vernon
I believe, one of the most important things about drafting is experience and knowledge. BDDS are the best in doing so and I couldn't be happier with our new home addition. John Smith
We would like to thank Owen and the BDDS team for their support and guidance in designing our new home. The help during the planning and application process was exactly what we needed. Karyn Moran

Residential Customer - Dural