Green Home Grant Scheme

What is the Green Home Grant Scheme (GHGS)?

It is a Government incentive which will allow homeowners and landlords to apply for vouchers worth up to two thirds of the cost of hiring tradespeople up to a maximum of £5,000 (£10,000 for households on low income)
The vouchers are available from the end of September 2020 and the scheme has now been extended to run until end of March 2022.

See the government endorsed advice website Simple Energy Advice for more information

Am I eligible for a Green Home Grant Scheme Voucher?

To be eligible for the voucher, the household must install a primary measure:

  • Insulation (solid wall, cavity wall, underfloor, loft, flat roof, room in roof, park home)
  • Low Carbon Heat (air source heat pump, ground source heat pump, solar thermal)

In addition to a primary measure, households can install eligible secondary measures:

  • Draft proofing.
  • Windows and doors: double/triple glazing (replacing single glazing), secondary glazing (in addition to single glazing), upgrading to energy efficient doors (replacing doors installed prior to 2002)
  • Heating controls and insulation: appliance thermostats, hot water tank thermostats, hot water tank insulation, smart heating controls, zone controls, delayed start thermostat, thermostatic radiator valves.

Apply for the Green Home Grant Scheme

How does the Green Home Grant Scheme affect the RHI Payments?

You can claim the Green Homes Grant for a renewable heat installation in addition to the Domestic Renewable Heat Incentive.
It is important to note that you need to claim the Green Home Grant first and then when you apply for the Domestic RHI, you will need to notify Ofgem that you have used the Green Home Grant and this amount will be deducted from your Domestic RHI Payments.

Use the government RHI Calculator

How much money will an Air Source Heat Pump System cost me?

A typical 3 bedroom detached bungalow that has an oil boiler and 9 radiators will cost approximately £15,000 to change the heating system to Air Source Heating.
You could expect to receive RHI of £9,500 (this would include and Green Home Grant Scheme payment), therefore if you received a voucher for £5,000 through the GHGS, then the remaining £4,500 would be made through the RHI payments.
It is estimated you would benefit from £2,500 fuel savings over the 7 years period.
These costs involved in installing a system include the following:

  • Removal of the existing system
  • Custom design of a heating system for your property
  • Installation of the Air Source Heat Pump (unit fitted outdoors)
  • Installation of a new Hot Water cylinder that has an increased size primary coil fitted.
  • Installation of a Buffer vessel (another cylinder for the heating system fluid)
  • Replacement of the radiators with new, larger radiators.
  • Replacement of the current heating controls.
  • Electrical wiring of the new system. Often a new supply will need to be run from the consumer unit to the outdoor Air Source Heat Pump
  • Plumbing required to adapt the old heating and hot water systems to the new Heat pump and radiators
  • Registration and certification for Microgeneration Certification Scheme so that you will be eligible for the Renewable Heat Incentive
How can I get a guide price for a heat pump for my property

We require some information to be able to custom design a renewable heating system for your property. The more information that you can provide us the more accurate we can be.

  1. Your contact details
  2. Your property address, including postcode
  3. Do you own the property/rent it/is it a holiday let?
  4. Plans of the property (one of the following):
      • Architect plans are ideal of course, including elevations and sections.
      • Estate agent floor plans – We can work with these floor plans but please ensure that we have all the room sizes (ideally including ceiling heights)
      • Basic drawing of the layout of your property accompanied with a list of the room sizes including ceiling heights.
  5. Window sizes in each of the rooms – Approximate age and are they Double glazed, single glazed etc.?
  6. Details of existing heating system. Is it oil or gas? Combi boiler or cylinder? Approximate age of the system.
  7. Radiators or Underfloor heating? Which system do you have, or would you like to have installed?
  8. The current number of radiators in each room, if installed.

Using the information that you provide we can produce a guide estimate for the work that you wish to be carried out. This estimate will also detail the expected running costs of the proposed system and the sum that you are likely to receive if you are eligible to claim the Renewable Heat Incentive.

Please email the plans and answers to the questions to

If I am interested after the guide estimate, what is the next stage?

If the information in the guide estimate sounds appealing and you wish to proceed then we can arrange to carry out a site survey so that we can complete a detailed heat loss calculation and then custom design your heating system to perfectly suit your property.
Please also refer to our website for details of the Renewable Heat Incentive (RHI) and Green Homes Grant Scheme.

Give us a call on 01603 898904 to arrange a site survey.

Which Installer should I choose?

Tradespeople must register for Trustmark or Microgeneration Certification Scheme (MCS) accreditation to take part in the scheme. Therefore, make sure your installer has the Trustmark or MCS accreditation.