Qualified Supervisor Certificate - Mechanical Services and Medical Gas Work - New South Wales


You will need this certificate if you intend to supervise or carry out mechanical services and medical gas work. Mechanical services and medical gas work is defined as:

a) The construction, installation, replacement, repair, alteration, maintenance, testing or commissioning of a mechanical heating, cooling or ventilation system in a building, which is associated with the heating, cooling or ventilation of that building and includes:

  1. any valve, regulator, pipe, flue, tank, heating or cooling pipe or surface, boiler, burner, solid fuel heater, coil or other item that is used in the system
  2. in the case of a cooling tower, any water pipe, valve, pump, automated dosing device or automated bleeding device or any other mechanical component that affects the cooling tower's cooling water flow rate or wastewater disposal
  3. roof sheeting and roof flashing that is necessary for the purpose of any work described in this paragraph or paragraphs (b)-(d), and

b) medical gasfitting work, and

c) the installation, commissioning and any incidental design work that is associated with the installation and commissioning of:

  1. any part of a single head split system, or
  2. a ceiling cassette system, or
  3. an add-on condenser unit for a ducted system associated with the heating and cooling of a building, and

d) any design work incidental to, or associated with, work described in paragraphs (a) and (b).

It does not include:

  • gasfitting work
  • work on a cooling tower drift eliminator
  • treatment of cooling or heating water
  • cleaning of a cooling tower
  • disassembly or reassembly of a flue terminal for the purposes of cleaning a solid fuel heater
  • connection or disconnection of a system referred to in paragraphs (a)-(d) from a water supply other than disconnection of the system from a water supply at an isolating valve adjacent to a mechanical component of that system.

A qualified supervisor certificate does not allow you to contract for work.

Service type


A licence defines the need to obtain recognition / certification and registration to undertake a certain business activity.

Eligibility requirements

To be eligible for this licence, you must:

  • be at least 18 years of age
  • be considered a fit and proper person for the purposes of the certificate
  • have the necessary qualifications and practical experience as specified by the Authority
  • not be a debtor to the Director-General or Administration Corporation
  • not hold any authority which is currently suspended or have had an unreasonable number of complaints, penalties or cautions against you
  • not be an apprentice or trainee.


1, 3 or 5 years


Anniversary of the date of issue


Fees Details for this service in table format.

Task Type Business Structure Amount Description
Apply Application All -

Grant of certificate:

  • 1 year - $156.00
  • 3 year - $263.00
  • 5 year - $454.00.

Fees for 2023-24

Apply Application All -

Restoration of certificate:

  • 1 year - $36.00
  • 3 year - $68.00
  • 5 year - $110.00.

Fees for 2023-24

General Duplicate Certificate All $55.00

Replacement certificate. Fees for 2023-24

Renew Renewal All -

Renewal of certificate:

  • 1 year - $30.00
  • 3 year - $60.00
  • 5 year - $103.00.

Fees for 2023-24

Vary Variation All $103.00

Add a trade or specialist category to certificate. Fees for 2023-24

Vary Variation All $103.00

Add a building category to certificate. Fees for 2023-24


Act(s) name

Home Building Act 1989 New South Wales

Regulation(s) name

Home Building Regulation 2014 New South Wales

Approval time

Approximately 10-12 weeks

Administering agency

Department of Customer Service

NSW Fair Trading

Contact details

Contact Email, Phone and Address Details for this service in simple two column table format, header then data.