Prebuilt aims to be the leader in architecturally designed prefabricated modular houses across Australia.


The prefabricated model of construction is an increasingly important part of Australia’s housing mix. Having successfully developed the most appropriate designs and sustainable construction techniques, Prebuilt is set to make a valuable contribution to this country’s housing future.

An Australian-owned business and member of the Housing Industry Association (HIA), Prebuilt has more than 6,500 square metres of factory space in Melbourne’s outer eastern suburbs, approximately 35 minutes from the CBD, available for the construction of its buildings.

Using the technology and systems developed for its residential housing, Prebuilt has also constructed a range of commercial and government projects and has extensive experience in large-scale civic construction, multi-residential construction, architecture, engineering and cost estimating.

In 2001, the founders of Prebuilt identified the need for well-designed, high-quality modular buildings that were a million miles from the archetypal boxes coming off production lines at the time.

With a background in development, construction and asset management, combined with a passion for quality architecture, owners Rob and Christiana Colquhoun established Prebuilt to deliver innovative design in the modular homes manufacturers market.

Since commencing operations in 2002, Prebuilt has constructed more than 300 houses with a wide range of budgets from $100,000 to $2,500,000. From 2005, the company expanded to include Prebuilt Commercial (formerly Precom), which develops and constructs projects on a larger scale.

Managing director Rob Colquhoun’s wealth of local and international experience includes senior management experience in construction and management roles with Bovis Lend Lease.

To maintain high standards of design and construction, Prebuilt has gathered together a team with many years’ experience in residential and commercial construction.

Rob Colquhoun – Managing Director

Managing Director Rob Colquhoun’s has a wealth of local and international experience includes senior management experience in construction and management roles with Bovis Lend Lease.

Christiana Colquhoun – General Manager

General Manager Christiana Colquhoun has a background in Commerce and Commercial Asset management. She holds a Bachelor of Commerce, Builders Licence and is a graduate member of the Australian  Institute of Company Directors.


At Prebuilt we believe that the health and wellbeing of our people and the public is of upmost value. Everyone who works with us has an important role to play, as a company we strive to ensure that our work is completed safely and without risk to ourselves and those we work with.

It is our policy to

  • Promote a positive attitude towards safety,
  • Regularly review and evaluate our process,
  • Ensure that safety is an integral part of every position,
  • Build our projects safer and without risk,
  • Undertake regular inspections to improve our compliance,
  • Investigate all incidents and prevent re-occurrences,
  • Lead our team to design projects with safety in mind,
  • Trust and work in total collaboration with our partners

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