Non Domestic FAQ


Non-domestic gas installers will be regulated, similar to the way those in the domestic gas sector currently are.

This will mean that from 2023,  most people working in the Non-domestic gas industry will need to be registered with the Register of Gas Installers Ireland (RGII).

To become registered as a non-domestic Registered Gas Installer (RGI), individuals will be required to complete non-domestic gas safety training. They will also need to fulfil the general conditions of becoming an RGI such as agreeing to the Rules of Registration, having suitable insurance cover and having work available for inspection.

Ahead of registration becoming compulsory in 2023, RGII have set up a free, voluntary, provisional register. This is to allow gas installers to express interest in becoming a non-domestic RGI and helps people access the training course.


The new regulations for non-domestic gas will apply from 2023. The original intention was to introduce regulation of the non-domestic gas works sector from 2019. Following consultation with and feedback from industry and to ensure introduction is as smooth as possible, it was decided to instead start regulation in 2023.

From 2023, most people carrying out non-domestic gas works will need to be qualified and registered with RGII. The voluntary provisional register will be replaced with the compulsory, full non-domestic register.

To transfer from the provisional to the full register, installers will need to at least complete the first part – the Core Safety and Pipework – of the Non-Domestic Gas Safety course. Further time will then be allowed for installers to the complete one of the specialist modules. To be on the full register installers will also need to fulfil the conditions of membership and paying fees and subscription.


The registration system will help ensure non-domestic gas works completed in Ireland are safe and meet the required standards. 

The extension of the RGI scheme to cover non-domestic gas works follows its successful introduction for the domestic sector. RGI’s will have to adhere to matters such as training, competence, inspection and insurance.


The new regulations will affect most people carrying out non-domestic gas works, including trainees, from 2023. This will cover activities such as installing, removing, repairing or servicing natural gas or LPG fittings and equipment.

There will be certain exceptions, for example designing gas works, manufacturing of gas fittings and welding works on dry gas pipes. Deciding the precise definitions of these exclusions is a priority for the CRU. We are working with industry on it and will provide an update as soon as possible.


The new regulations will cover non-domestic gas works carried out in the Republic of Ireland.

The exact legal definition of what is and isn’t non-domestic gas works is being finalised and we will keep the sector informed.

For training, the CRU is continuing to work with training providers to offer the Non-Domestic Gas Safety course and will give updates as these progress. At present, METAC is the only QQI accredited centre offering it.


If you haven’t already done so, the first step is to visit and join the non-domestic gas works  provisional register.

You will then receive information on the best way to access the Non-Domestic Gas Safety training course. Depending on your existing qualifications, you might also be asked for further information, for example, around your experience working in the sector. If you are currently registered with RGII you will only require a letter from RGII to get a place on the course.

Installers who have signed up to the provisional register and have been asked to submit a portfolio of work should continue with their applications. The new start date will not change the requirement to complete the NDGS course or the course entry process.

Individuals who have already completed their Core Safety and Pipework part of the Non-Domestic Gas Safety course will not be disadvantaged by the new regulation commencement date. Any requirement to complete the proposed Non-Domestic Gas Assessment will not apply until five years after completion of the full Non-Domestic Gas Safety course is compulsory.

If you have any further queries, please contact