Non Road Mobile Machinery
Copyright: Photo taken by Dan Marsh at Kings. All rights reserved. 2020

Non-Road Mobile Machinery (NRMM)

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 which are fitted with an internal combustion engine and not intended 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.

In a similar way to 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 that need to be met depend on where the construction site is:

The current standards are stage IIIB for construction machinery operating in the Central Activity Zone and Canary Wharf Areas and stage IIIA in the rest of London.

Development zones map

All machinery in the Central Activity Zone and Canary Wharf Areas (shown in orange) should meet at least stage IIIB.

All machinery on major development sites in the rest of London (shown in blue) should meet at least stage IIIA.

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 progressively tighter over time:

  • From 1 September 2020* the standards will be stage IV for construction machinery operating in the Central Activity Zone, Canary Wharf and Opportunity Areas and stage IIIB in the rest of London
  • 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.

Stages IIIB and IV have not been defined for machines with constant speed engines, such as generators. This means that these machines will need to meet stage V from September 2020 by default.

From September 2020 there will be stricter emissions controls in the “opportunity areas” as well as the Central Activity Zone and Canary Wharf. You can find more detail about London's opportunity areas on our Opportunity Areas webpage.

*Please see COVID-19 update below.

COVID-19 update

We recognise that COIVD-19 has caused disruptions to construction sites and to supply chains. This could make it more difficult for construction and hire companies to prepare for the new NRMM Low Emission Zone standards which come into effect in September 2020.

In response, we are introducing a ‘time limited’ exemption from the new standards for a period of six months between the 1 September 2020 and the 28 February 2021. 

We are not suspending the NRMM Low Emission Zone completely and all machinery will still need to meet the existing emissions standard for the zone they are in.

This is a time limited intervention and we strongly encourage site operators to use the time to ensure that they meet the new standards as soon as possible, either by ensuring the supply of newer, cleaner equipment or by arranging for older machines to be retrofitted. 

For more details of the ‘time limited’ exemption please see the appendix to the updated exemption policy, which you can find on the link below. If you have any questions, please use the contact us form.

NRMM Register

Most sites where the NRMM Low Emission Zone applies will be required to log all machinery online using this register.

The register is also the only way that site operators can obtain an exemption or approval to use retrofitted or specialist equipment.

If you are an existing user you can use your account to register a new site, register machinery on an existing site or accept an invitation to register machinery at someone else’s site.

If this is your first site, or you are new and have an invitation to an existing site, you will need to create an account before you can start using the site.

If you are a site or machinery operator and have any queries about the scheme or are a local authority/enforcement officer who would like access, please use the webform below. 

Log in or create an account

Please log in to the Register using the button below.

If you experience issues with the site, your account or log in details please email [email protected] or alternatively use the contact form at the bottom of this page.

Guidance for site operators

A detailed guide for site operators, including how to find out the engine stage for each machine and tips on how to make sure your site is compliant can be found in the NRMM practical guide downloadable using the link below.

Compliance by Retrofit and Exemptions

If your machine does not meet the emissions standard for the site you intend 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.

In limited circumstances we can issue exemptions for individual machines that do not meet the standards and have not been retrofitted. The full exemption policy is available for download below.

Contact us

Get in touch with the NRMM team

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