Best Green Grant for Oil Heating in Scotland — HES Wins Clearly

The Home Energy Scotland (HES) heat pump grant is the best option for oil-heated properties in Scotland. It provides £9,000 as a non-repayable grant plus £9,000 as an interest-free loan for urban properties (£15,000 combined), rising to £9,000 grant + £9,000 loan for rural and island properties (£18,000 combined). There is no income or benefits requirement — it is open to all homeowners.

Yes. The HES heat pump grant specifically targets properties on oil (and LPG) heating as its primary audience. Replacing an oil boiler with an air source heat pump can be funded up to £18,000 for rural properties (£9k grant + £9k interest-free loan). This makes the upfront cost comparable to a new oil boiler while dramatically reducing running costs.

A typical Scottish home heating with oil might spend £2,500–£3,500 per year depending on consumption and oil prices. The same home with a heat pump typically costs £1,200–£1,800 per year in electricity — saving £1,200–£2,000 annually. Over 5 years, this represents £6,000–£10,000 in savings, in addition to the HES grant value.

ECO4 is available to oil-heated properties if you receive qualifying benefits (Universal Credit, Pension Credit, etc.) AND your property has an EPC rating of D, E, F, or G. For oil properties meeting these criteria, ECO4 can fund heat pumps, insulation, or solar panels at no cost. If you don't receive qualifying benefits, HES heat pump grant is the main route.

With the HES grant supporting the upfront cost, the payback period for replacing oil with a heat pump is typically 4–7 years based on running cost savings alone. For rural properties with the £18,000 combined package, the grant significantly reduces net installation cost, improving payback. Running cost savings of £1,500–£2,000/year mean a well-supported installation can pay back within 5 years.