What to do with your oil tank
Figures updated 15 November 2026
When a heat pump replaces your oil boiler you can have the tank removed, or leave it in place made safe. Either way, use up as much oil as you can first, without running so low that sludge is drawn into the boiler. BoilerJuice
Leaving it in place
OFTEC's guidance is to empty the tank, disconnect and cap the pipework, label it "Do not fill", fill it with foam or water, and tell your home insurer. OFTEC
Having it removed
Oil residue is hazardous waste. Whoever takes the tank or oily waste away must be a registered upper-tier waste carrier. OFTEC As a householder you have no hazardous-waste duties of your own; the contractor takes them on when they accept the waste. Regulations
Published prices for removing and disposing of a home oil tank are £500 to £1,000 for an above-ground tank (123 Oil) and £600 to £1,300 including VAT (AnyJunk). Underground tanks cost more. 123 Oil, AnyJunk
Leftover oil
Clean oil can be sold on through a company registered with HMRC as a dealer in controlled oils. OFTEC Crown Oil, for example, collects surplus fuel only if there's at least 1,000 litres. Crown Oil
The rules in England and Wales
In England, a home oil tank of 3,500 litres or less falls under building regulations rather than the oil storage rules for businesses. GOV.UK In Wales, a home tank installed since 15 March 2016 is covered by the oil storage regulations, whatever its size. Welsh regulations