Guide to UK Green Homes Grant

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Green home grants (GHG) provide free vouchers that can be used to make energy-saving improvements to your home, to schemes that can bring significant reductions to the cost of plug-in electric vehicles (EVs). There are plenty of green home grants available for UK homeowners, landlords and motorists.

The good news is that there are, in fact, a wide range of energy grants and schemes available to UK residents that can help with the cost of making your home and mode of transport more efficient and eco-friendly.

The Green Homes Grant was launched in September 2020 as a welcome solution to the growing challenge to meet the UK’s target for 2050 net-zero emissions. It was also hailed as a way to stimulate the economy after the COVID-19 pandemic.

As part of the government’s goal for a green industrial revolution, the government green grant offered a way for homeowners and landlords across England to retrofit their homes. Expensive energy efficient upgrades were suddenly made affordable through the discount vouchers offered

What is the Green Homes Grant?

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Homeowners and landlords in England are able to apply for a green home grant voucher towards the cost of installing energy efficient and low-carbon heating improvements to homes, which could help save up to £600 a year on energy bills.

If a valid application was submitted before 5pm on 31 March 2021, the government will provide a voucher that covers up to two thirds of the cost of qualifying improvements to your home. The maximum value of the voucher is £5,000. You may be able to receive a higher level of subsidy if you are a homeowner and either you or a member of your household receives one of the qualifying benefits, covering 100% of the cost of the improvements. The maximum value of these vouchers is £10,000. Landlords could not apply for the low-income part of the scheme.

Local Authorities in England will also be making support available for low income households in their local area through the Green Homes Grant: Local Authority Delivery. Contact your Local Authority to see if they are participating in this scheme and for further information.

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What improvements can I get?

Vouchers must be used to install at least one primary home insulation or low carbon heating measure.

If you chose to install at least one of the primary measures, you could use your voucher to help cover the cost of secondary measures. The subsidy for the secondary measure is capped at the value of the subsidy provided for the primary measures. For example, if you receive £400 for a primary measure such as cavity wall insulation, you will be able to receive a maximum of £400 for a secondary measure such as an energy efficient replacement door.

The primary and secondary measures are set out below:

Primary Measures


  • Solid wall
  • Cavity wall
  • Under-floor insulation (solid floor; suspended floor)
  • Loft
  • Flat roof
  • Room in roof
  • Park home insulation

Low carbon heat:

  • Air source heat pump
  • Ground source heat pump
  • Solar thermal
  • Biomass boilers

Secondary Measures

Windows and doors:

  • Draught proofing
  • Double/triple glazing (where replacing single glazing)
  • Secondary glazing (in addition to single glazing)
  • Energy efficient replacement doors (replacing single glazed doors installed before 2002)

Heating controls and insulation:

  • Hot water tank thermostats
  • Hot water tank insulation
  • Heating controls (e.g. smart heating controls, zone controls, intelligent delayed start thermostat and thermostatic radiator valves)

What if I’m claiming other grants or funding?

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  • Energy Company Obligation

You will not be able to claim Green Homes Grant subsidy vouchers towards the cost of a measure which has also received funding under the Energy Company Obligation (ECO). However, you can claim both ECO GRANT and Green Homes Grant subsidy providing they are each for different measures – for example loft insulation and cavity wall insulation.

  • Renewable Heat Incentive

The Domestic Renewable Heat Incentive (RHI) gives households money towards renewable heating costs in their home. Payments are made for 7 years and are based on the amount of renewable heat made by your heating system.

You can claim both the Domestic RHI and the Green Home Grant for the renewable heat installation. You must claim first and then notify Ofgem that you have used it when you apply for accreditation to the Domestic RHI. The Green Homes Grant will then be deducted from your Domestic RHI payments.

Households can claim the Green Homes Grant for energy efficiency measures both before and after accreditation to the Domestic RHI.

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Getting the voucher

You will receive a separate voucher for each of the measures that you have applied to install.

Each voucher is only valid for the measure and property you have applied for. The voucher is only for use by the named applicant and cannot be transferred to another person.

You can only begin work once your voucher has been issued. Any work that was started before that date cannot be claimed.

Vouchers issued up to 31 August 2021 will be valid for 3 months from the date they are issued.

Vouchers issued after 31 August 2021 will expire no later than 30 November 2021.

All vouchers should be redeemed before their expiry date.

  • Voucher extensions

If you request a voucher extension at any date up to and including 31 July, vouchers will be extended for 90 days or until 31 October, whichever is sooner.

Extension requests received after 31 July may be granted in more limited circumstances. For the majority of vouchers, extension requests may be granted only if work has started on your voucher measure. Vouchers that are extended will expire on 31 October 2021.

We recognise that occasionally, once work has started, circumstances may arise that are fully beyond your control. In such a situation please contact the scheme administrator as soon as possible to assess if a short extension until 30 November 2021 at the latest could be considered (subject to circumstances). No vouchers will be extended beyond 30 November 2021.

If you have a voucher for one or more of the following measures that was issued after 30 April, you may still be granted an extension for the voucher after 31 July, even if work has not started. Vouchers will be extended for 90 days or to 30 November 2021, whichever is sooner.

The measures are:

  • solid wall insulation (internal or external) 
  • park home insulation 
  • air source heat pump  
  • ground source heat pump  
  • hybrid heat pump 
  • biomass boiler  

If you have a voucher for a primary measure that expires after 31 July and has not yet been redeemed, then you can still apply for an extension to any secondary measure voucher that you have, even if work has not started on them. Vouchers will be extended to 31 October 2021 or the expiry date of your primary voucher, whichever is later.

Please note that extensions for secondary measures are not automatically granted. You will need to apply for extensions on each voucher that you wish to extend. 

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