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Contractor prequalification

Only contractors who are registered as ‘prequalified’ by us may be eligible to tender for state highway contracts with us without having to go through the preliminary formalities every time.

The prequalification system is an acknowledgement of your qualifications and experience – and it simplifies the tendering process, saving time and effort in the tender process.

Prequalification is available for four categories (each with four levels):

  • routine and minor works
  • surfacing
  • bridge construction
  • construction.

How to apply for prequalification

The Transport Agency has made some changes to how we manage our prequalified contractors. We have established a business relationship with ISNetworld to help our company objectively manage contractor prequalification requirements. As a result, all our prequalified physical works contractors will be required to become subscribers to ISNetworld in order to be eligible to tender for Transport Agency contracts.

ISNetworld website(external link)

This new system allows us to streamline the way we collect, verify and manage supplier prequalification information. With the introduction of the new system, our objective is to allow you to join a pool of competent suppliers who share our values in keeping people safe and well. It will also help us to communicate with you more effectively, and efficiently manage documentation.

If your company is new to ISNetworld, there will be a nominal fee for your subscription, based on the size of your organisation. To find out more, you can call ISN on 0800 443 805 or visit their ISNetworld website. If your company is a current subscriber to ISNetworld, there is no additional fee.

Your company’s ISNetworld subscription will provide the Transport Agency access to the following required information:

  1. Company information – Populate your company information in ISNetworld including company contact information, main and branch office locations, and types of work/industry classifications. This will provide us with your company’s most current contact information.
  2. Document submission – ISNetworld will track documents such as Reference Letters, Organisational Charts, Resources and CVs. During your subscription set-up, ISNetworld will explain how to submit these documents and make them available online to the Transport Agency for review.
  3. HSE questionnaire – The Transport Agency will use the questionnaire in ISNetworld to collect aspects of your company’s health and safety information.
  4. HSE and Traffic Management Programmes – Submit copies of your HSE and Traffic Management programmes/information to ISNetworld so that the ISN Review and Verification Services (RAVS) team can review and assess it for consistency with Transport Agency standards and regulatory requirements.

Prequalifying with us allows you to tender for NZ Transport Agency contracts that include a prequalification requirement. The Prequalification information pack provides further details on our prequalification process.

Prequalification information pack

For further information please contact us at

Register of prequalified contractors

The register lists all prequalified contractors according to work levels and category. It is updated on 31 January, 30 April, 31 July and 31 October each year.

View the register of prequalified contractors