About BDDS

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

Meet The BDDS Team

Owen Tregarthen

Julie Tregarthen

Melissa Shewaram
Office Manager

Chris Pasfield
Senior Building Designer

Randa Sedrak
Senior Building Designer

the design and drafting process

1. Obligation-free site inspection

Provide an obligation free site inspection to find out what the client requires and give some preliminary advice on design and what is necessary on that particular project to get approval.

2. Detailed quotation

Organise a detailed quotation for the project and suggest the client fill in a questionnaire so we can make sure we understand their requirements.

3. Project Discussion

Once the quotation has been signed and the deposit paid the project is allocated to one of our qualified team, who will contact the owner to do a site measure if required depending on the project and discuss their needs and aspirations as well as their budget.

4. Research

Research is carried out to determine the site constraints e.g Bushfire requirements, easements and the organising of a survey if that is required.

5. Preliminary Drawings

Preliminary CAD drawings are prepared for discussions with the owner. There may be several meetings involved to finalise the design.

6. Cost Estimates & Council meetings

When the client is satisfied with the design, cost estimates are obtained to ensure viability and a meeting with council may be carried out to ensure the project meets the development control requirements.

7. Document Lodgement

When the project has ticked all the boxes final plans and documents are prepared for lodging with the Approval Authority.

8. project management

When final building approval has been obtained we assist the owner in obtaining tenders to carry out the work or if requested can organise the tenders and manage the project on the owners behalf.

Our Mission

  • Listen to our clients needs and respond in a timely manner and keep our clients informed at all times
  • Provide a high quality comprehensive Service to our clients
  • Provide Designs that meet their expectations
  • Provide plans & documentation that is 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 of.

BDDS is an Australian company created to provide superior building services to homeowners and property developers across NSW. The team at BDDS specialise in design and drafting services for residential, commercial and industrial projects. As building designers, we work with our clients from the design stage right through to construction. With our years of knowledge and experience, we can turn your ideas into reality.


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.

Over the last 3 years the company has completed on average, 80 projects per year. Some of these projects include:

  • New dwellings & alterations & additions
  • Multi unit housing projects
  • Caravan parks
  • Restaurant & function centres
  • Retail developments & fit-outs
  • Commercial & industrial developments
  • Unauthorised building works approvals

Our Work

  • Clontarf

  • Glenorie

  • Thornleigh

  • Pymble

  • Mosman

  • Enmore