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Green Homes Grant – FAQs for Consumers

The Green Homes Grant is a government-funded voucher scheme designed to help with the installation of energy efficiency measures on homes in England to reduce energy bills and carbon emissions.

The voucher of up to £5,000 will cover at least two thirds of the cost of some energy-saving home improvements. Some homeowners on qualifying benefits can get a voucher covering the total cost of these home improvements, up to £10,000.

No, the Green Homes Grant is only eligible in England.

It does not apply to properties in Scotland, Wales or Northern Ireland. However, some of our MCS certified Contractors do operate across the UK, meaning that you could use an MCS certified Contractor who is based in Scotland to install in a property in England.

If you want to install a low carbon heating measure under the Green Homes Grant, you need to make sure that you use an MCS certified contractor.

MCS is a mark of quality for renewable energy installations. An MCS certified Contractor works to our industry standards and highlights quality and competency.

To find out more about MCS or the low carbon heating measures, you can call our Helpdesk Team on 0333 103 8130.

You can use the voucher to install either insulation or low carbon heating. These are called ‘primary measures’ under the scheme. For insulation (or any ‘secondary measures’) you must use a TrustMark approved tradesperson in order for your voucher to be eligible.

For more information on this you should contact TrustMark directly and can find out more by visiting:

If you are interested in installing low carbon heating you must use an MCS certified Contractor who is also TrustMark approved in order for your voucher to be eligible.

The government are signposting consumers to the Simple Energy Advice website which has a Green Homes Grant eligibility calculator and can give you an idea of what improvements you might be able to claim funding for once vouchers are available. Please visit:

No. Unfortunately these other measures fall outside our remit. We can only help with low carbon, renewable technologies.

If you need help, you should look at the Simple Energy Advice website, or contact TrustMark.

Low carbon heating measures provide renewable ways of heating your home. Low carbon heating can significantly reduce the amount of CO₂ your home produces and can reduce your energy bills compared to fossil fuel systems like a gas boiler. They can provide energy efficient, sustainable heating, while offering the same level of warmth as the fossil fuel systems you are probably familiar with.

Those that qualify under the Green Homes Grant voucher scheme includes Air Source Heat Pumps, Ground/Water Source Heat Pumps, Solar Thermal (liquid-filled flat plate or evacuated tube collectors) and Biomass Boilers.

Solar Thermal linked to a Thermal Store can also be used for space heating, as long as it is used for water heating.

To qualify for the voucher, the installation must be undertaken by an MCS certified Contractor using MCS certified products. They must also be TrustMark registered.

To have low-carbon heating installed, your home will need to have cavity or solid wall insulation and loft insulation (where applicable). You can have these installed as part of a package.


Solar Thermal can also be used for space heating, as long as it is used for water heating.

This type of installation is considered a primary measure under the Green Homes Grant scheme and would qualify for a voucher.

There are lots of factors that will affect how much it could cost to have low carbon heating installed in your home. This includes the type of measure, the current heating system in your home and what size system you might need. There are also regional differences.

The Simple Energy Advice website offers an indication in their Energy Saving Plans but these are only a rough estimate.

As a guide, you could expect to pay the following for the total cost of the installation:

  • Solar Thermal between £3,500 – £9,500
  • Air Source Heat Pump between £8,000 – £15,000
  • Ground Source Heat Pump between £16,000 – £24,000
  • Biomass Boiler between £10,000 – £24,000

These are just an indication and the installation could cost more, or less than this. The costs include some minor changes to the heating system and a system flush/cleanse but replacement of the radiators in a property and/or running new pipework will add extra costs.

Your MCS certified Contractor will undertake a full diagnostic of your property and lifestyle in order to determine the best solution and provide a more accurate price.

With any low carbon heating measure, we would always advise taking a ‘fabric first’ approach as this will maximise the performance of any heating measure you may look to install in your home.


Low carbon heating is exactly the same in this respect as any other source of heating, in that if your property is not well insulated, your chosen heating system will need to work harder and will therefore be less efficient and cost you more to run.

The majority of homes in the UK would benefit from a heat pump or solar thermal system.

Choosing the right one for your specific property depends on the building size, location and outside space that you have available. Your MCS certified Contractor can guide you as to the best solution for your home.

For the general scheme, the following properties are eligible:

  • All owner-occupied homes (including long-leaseholders, shared ownership)
  • Landlords of private rented sector domestic properties
  • Landlords of social sector domestic properties (including Local Authority owned homes)
  • Park homeowners (for residential sites including Gypsy and Traveller sites)

For the low-income scheme, only owner-occupied properties and park homes are eligible.

You cannot apply for the scheme if you have already received a grant from your local authority as part of the Local Authority Delivery Scheme.

All Contractors are listed on the Simple Energy Advice (SEA) website.

This is the website that the government are signposting consumers to in order to research the energy efficiency measures and to find a Contractor to obtain quotes from.

Alternatively you can use the Installer Search on the MCS website here. You will need to check that they are also TrustMark registered.

Homeowners and landlords can apply for the vouchers from the end of September 2020, when the scheme launches. You should wait for the official application portal for vouchers to open.

The scheme will close at the end of March 2021 and your chosen installation will need to be completed by then in order for you to redeem the voucher.

Before applying for a voucher, the government advises that you use the Simple Energy Advice (SEA) website to check that you are eligible for a voucher (and for how much) and to see what energy efficiency improvements may be suitable for your home and an estimate of how much they might cost.

You can then search the database to find an accredited tradesperson to undertake your chosen improvement(s). You should obtain at least three quotes to make sure they that you are getting the best value for money, but you can choose which quotation to go with.


Once the portal opens, you will then apply for your voucher, inputting the name of your chosen tradesperson and arrange for the work to be carried out.

The voucher of up to £5,000 (general scheme) will cover at least two thirds of the cost of some energy-saving home improvements. Some homeowners on qualifying benefits can get a voucher covering the total cost of these home improvements, up to £10,000 (low-income scheme).

In terms of eligibility for the £10,000 voucher under the low-income scheme, there is a list of qualifying benefits in this document.

You must make sure the work is scheduled to be completed, and the voucher redeemed subject to its terms and conditions, by 31 March 2021.


Yes. You can claim both for your MCS certified renewable heat installation. You would apply for your Green Homes Grant voucher first and then notify Ofgem that you have used it when you apply for the Domestic RHI.

The Green Homes Grant voucher payment will act as an upfront payment for your RHI, being deducted from your Domestic RHI payments – so you will receive repayments at the reduced amount over 7 years.