Detailed guide: Green Homes Grant scheme: register as a certified tradesperson or business

The Green Homes Grant scheme allows homeowners and landlords to apply for a voucher from the government towards the cost of qualifying energy efficiency and low carbon heating improvements to homes. The voucher will cover two-thirds of this cost (up to £5,000) or all the cost (up to £10,000) if the household is on low-income and receives certain means-tested benefits.

To carry out work under the scheme, all tradespeople and businesses will need to be certified to install energy efficiency or low carbon heat measures to relevant standards and to register their certification with TrustMark.

Who should register

You should register for TrustMark if you are a tradesperson or business that carries out energy efficiency and/or low carbon heating improvements. Read more information on the list of measures covered by the voucher.


Before you can register with TrustMark, you must be certified to relevant standards.

If you install energy efficiency measures, you must be certified to install measures against Publicly Available Specification (PAS) standards 2030: 2017 or 2030: 2019 by a certification body that has been accredited by UKAS. More information is available on the UKAS website.

If you install low carbon heat measures such as heat pumps, you must be certified with the Microgeneration Certification Scheme (MCS).

How to register

How the scheme works

  1. Register as a certified installer on the TrustMark website.

  2. You will be added to a directory of certified installers on the Simple Energy Advice website, where homeowners can contact you to obtain a quote.

  3. You will need to register your company and bank details with the administrator of the voucher scheme so you can receive payments. You will need to sign up to the terms and conditions of the voucher scheme, which will be issued by the administrator as part of the registration process.

  4. Homeowners can apply for a voucher from the end of September that will cover two-thirds of the cost of the work (up to a maximum value of £5,000). Homeowners on low-incomes that receive certain means-tested benefits can get 100% of the cost covered (up to a maximum value of £10,000).

  5. The voucher will contain the name of the tradesperson or business that the homeowner has selected to carry out the work. More information on this will be announced soon.

  6. The government will pay you for costs covered by the voucher after the work is completed and the voucher has been redeemed (subject to meeting the scheme and voucher terms and conditions).

Vouchers cannot be used to help pay for works that were carried out prior to the voucher being issued.

The Department for Business, Energy and Industrial Strategy may vary the terms of the scheme or close the scheme at any time.