About the ECO tool

We’ve developed this tool because we needed it to administer the Carbon Saving Communities Obligation (CSCO) and the rural element of the Carbon Emissions Reduction Obligation (CERO), under the Energy Company Obligation (ECO).

While we designed it to assist our administration, we’ve also made it publicly available to help others, such as energy companies, the wider supply chain and consumers.

What can the tool do?

We will use this tool to validate whether a CERO Rural or CSCO measure is in an eligible CERO Rural or CSCO area respectively. We do not require suppliers, or their supply chain, to use this tool.

You can use this tool to:

For help using the tool, download our ECO tool Help Guide


Eligibility for CERO Rural and CSCO may differ and depends on when a measure was/is to be installed. This tool refers to these different time periods as ‘ECO1’, ‘ECO1.2’, ‘ECO2’ and ‘ECO2t’. The table below details the time period for each:

ECO Time Period Comments
ECO1 01/10/2012 to 31/03/2014 The ECO scheme first started on 1 January 2013 but measures could be installed from 1 October 2012.
ECO1.2 01/04/2014 to 31/03/2015 The ECO scheme changed in 2014 and introduced more eligible areas for measures installed from April 2014.
ECO2 01/04/2015 to 31/03/2017
The ECO2 scheme started on 1 April 2015.
The CSCO element of ECO closes on 31 March 2017
ECO2t 01/04/2017 to 30/09/2018 The ECO2t extension runs from 1 April 2017 and introduces a rural minimum requirement under CERO.

You can find further information about the CERO Rural and CSCO requirements under ECO at our webpage Energy Company Obligation.

Need Help?

For system support queries on this site please Report an Issue

For further guidance or for queries on scheme administration, please see our webpage Energy Company Obligation. Alternatively, contact us at eco@ofgem.gov.uk.

Please see the following link to view the Government's ECO2t consultation response: Help to Heat Consultation.

Energy Suppliers

Energy suppliers obligated under ECO have the option to download a copy of the postcode database for integration with their own systems. This area is password protected, and the account details have been distributed to the energy suppliers.

Download postcode database

Note: CSCO will close at midnight on 31 March 2017 so this tool should not be used to identify CSCO eligible postcodes after this date.

For copyright and disclaimer information please see: Copyright and Disclaimer
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