Non-Road Mobile Machinery (NRMM)
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You can also read the Accessibility statement for Non-Road Mobile Machinery.
London's Low Emission Zone for Non-Road Mobile Machinery
Non-Road Mobile Machinery (NRMM) is a broad category, which includes mobile machines and transportable industrial equipment or vehicles that are fitted with an internal combustion engine and not meant for transporting goods or passengers on roads.
NRMM, particularly from the construction sector, is a significant contributor to London’s air pollution. The NRMM Low Emission Zone uses the Mayor and London Borough’s planning powers to control emissions from NRMM used on construction sites.
Current standards
Like the Ultra Low Emission Zone, the NRMM Low Emission Zone requires that all engines with a power rating between 37 kW and 560 kW meet an emission standard based on the engine emission “stage”.
The standards to meet depend on where the construction site is, and sometimes the type of machine:
- The current standards are stage IV for construction machinery operating in the Central Activities Zone and Opportunity Areas, and stage IIIB in the rest of London.
- Stage IV has also not been directly defined for variable speed engines smaller than 56 kW. In most cases, these engines will need to meet stage V if they are in the Central Activities Zone (CAZ) and Opportunity Areas (OAs).
- Stages IIIB and IV have not been defined for machines with constant speed engines, such as generators. This means these machines need to meet Stage V across the whole of London.
Development zones map
All machinery in the Central Activities Zone and Opportunity Areas (shown in orange) should meet at least stage IV.
Find more detail about London's Opportunity Areas.
All machinery on sites in the rest of London (shown in blue) should meet at least stage IIIB.
When you are registering a new site, you will be able to drop a pin on the site location to identify which zone your site is in.
Future changes to the standards
The standards for the NRMM Low Emission Zone will get tighter over time:
- From 1 January 2025 the standards will be stage IV throughout London.
- From 1 of January 2030 the standards will be stage V throughout London.
- From 1 of January 2040 only zero emission machinery will be allowed.
NRMM Register
Most sites in the NRMM Low Emission Zone will be required to log all machinery (with a power rating between 37 kW and 560 kW) using the online register.
If you're a new user, you will need to create an account before you can start using the site.
If you're an existing user, you can use your account to:
- register a new site
- register machinery on an existing site
- accept an invitation to register machinery at someone else’s site.
The register is also the only way site operators can get an exemption or approval to use retrofitted or specialist equipment.
Guidance for site operators
Read the NRMM practical guide, which provides detail for site operators. It includes how to find out the engine stage for each machine and tips on how to make sure your site is compliant.
Please note, the document is currently under review.
Compliance by Retrofit
If your machine does not meet the emissions standard for the site you plan to use it on, you can retrofit additional pollution control equipment as an alternative to replacing the machine or the engine.
There are a variety of retrofit systems available and some are more effective than others. To ensure the systems fitted are suitable for the NRMM Low Emission Zone, we will only accept retrofits listed on the Energy Saving Trust website.
All retrofitted machines within scope (between 37kW and 560kW) require an exemption. For details on how to submit an exemption requested for retrofitted NRMM please refer to the full Exemption and Retrofit Policy below.
Exemptions
In limited circumstances we can issue exemptions for individual machines that do not meet the standards and have not been retrofitted.
Evidence must be provided when applying for an exemption. Every exemption request is considered on a case-by-case basis.
For full details please refer to the Exemption and Retrofit Policy below.
Helpful tips for applying for exemptions
For all NRMM exemption requests, please provide as much evidence as possible to support your application.
For generator exemption requests
If you're applying for an exemption for a Stage IIIA generator because you're unable to source a Stage V generator, please upload the following evidence:
- A dated statement issued within the last 6 months from the supplier confirming that no Stage V solutions are available for the site and details of the supplier’s outstanding orders to demonstrate they are working towards a Stage V fleet.
- Loading data (or equivalent) to demonstrate the power demand on site, with an explanation of any loading issues that apply.
- Clarification on what other technologies were considered to try to overcome the loading issues, including battery options where appropriate.
We will continue to support individual site operators and construction companies so if you have any specific queries, please contact us at [email protected].
Contact us
Get in touch with the NRMM team
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