Plumb-Line Renewable Energy Solutions

There are various government schemes that provide funding for renewable energy or energy efficiency measures to help you cut your energy costs and reduce your carbon footprint.

Green Homes Grant

Plumb-Line is an accredited installer for the Green Homes Grant and other government schemes as hold TrustMark, MCS and PAS2030 certifications.

The Green Homes Grant is a scheme which ran until March 2021. If you’re a home owner in England, you can get vouchers worth up to £5,000 (or £10,000 if you’re on certain means-tested benefits) to pay for energy-efficiency measures.

Vouchers will cover two-thirds of the cost of eligible improvements, up to a maximum government contribution of £5,000.  Unless someone in your household receives certain benefits, then you may be eligible for a voucher covering 100% of the cost of the improvements up to the value of £10,000.

Check if you’re  eligible for the Green Homes Grant  

The Green Homes Grant covers what are known as primary and secondary measures. The voucher must be used to install at least one primary measure.

Primary measures


  • Solid wall insulation (internal or external)
  • Cavity wall insulation
  • Under-floor insulation (solid floor, suspended floor)
  • Loft insulation
  • Flat roof insulation
  • Pitched roof insulation
  • Room-in-roof insulation
  • Insulating a park home

Low carbon heat

  • Air source heat pump
  • Ground source heat pump
  • Solar thermal (liquid filled flat plate or evacuated tube collector)
  • Biomass boiler
  • Hybrid heat pump

Secondary measures

If you install at least one primary measure, your voucher can be used to help cover the cost of any of the following secondary measures. The amount you get towards the cost of secondary measures cannot exceed the amount you get for primary measures. You will only be able to redeem vouchers for secondary measures once you have installed a primary measure and redeemed the vouchers for that measure.

Heating controls and insulation

  • Hot water tank thermostat
  • Hot water tank insulation
  • Heating controls (such as, appliance thermostats, smart heating controls, zone controls, intelligent delayed start thermostat, thermostatic radiator valves)

Windows and doors

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

The voucher covers the cost of labour, materials and VAT. Additional works will be covered by the voucher if they are necessary for the installation of measures. Work must be completed by a qualified and TrustMark-accredited installer and cannot be completed by yourself, a member of your household or your immediate family.

For more information about our renewable energy installation services and how you can take advantage of other government schemes, see our renewable energy section.