One Zone Limited is a consulting engineering company providing detailed design engineering and computer aided drawing production to contractors and design consultants in the UK, US, Asia and Australia. Companies tend to use One Zone in a variety of ways depending on their needs, typically we get involved where companies wish to:
  • Manage resources more efficiently - by improving their resource management and ability to meet deadlines, using One Zone as an additional resource during peak workload periods, instead of paying overtime, hiring contract staff, using engineers to do CAD and in some cases missing delivery dates.
  • Become more customer focused – by freeing up the management time of their Associates and Project Engineers by removing the need to supervise and co-ordinate routine production tasks, allowing them to focus on the creative aspect of the design process and spend more time interacting with the design team and the client.
  • Increase profitability - by reducing the cost of detailed design engineering and CAD production. Typically this can reduce drawing production costs by 50-60% and detailed engineering costs by 60-70%

Typical services provided include:

  • Complete detailed designs developed from the consultants scheme design
  • Section drawings and details sheets
  • Double line drawings based on single line layouts
  • Engineering calculations i.e. fan static pressure calcs
  • Schedule preparation
  • CAD drawings from mark-ups
  • QA checking
  • Co-ordinated services drawings
  • Builders Work Drawings

One Zone aims to provide quality, cost effective services which are flexible to meet the needs of our clients. One Zone is looking to develop long term partnerships with clients fitting seamlessly into their work production process and avoiding the pitfalls encountered when using short term contract staff. In doing so, One Zone can give its clients a real competitive advantage in terms of the quality of the services they provide, speed of delivery and cost.

One Zone offices are:

  • Managed by UK Engineers
  • Staffed by highly trained Engineers for both design and drawing tasks all of whom have extensive experience in completing UK, US and Australian projects
  • Fully networked, fire wall protected ,computer systems
  • Connected by high speed, large pipe, broadband internet access
  • Equipped with high performance 19” screens CAD workstations
  • Providing both AutoCAD and Mircostation capability


Ph.. (02) 9620 7999 --- Fx. (02) 9620-7222 --- --- 

Address. Unit 4 / 19 Boden Road, Seven Hills. NSW 2147 Australia