You must intend to build or renovate a property to an EPC rating of A or B and; Plan to include at least two of the following qualifying energy efficient features: photovoltaics, solar panels, air source heat pump, ground source heat pump, rainwater, harvesting, greywater collection, triple glazing, mechanical ventilation with heat recovery system, biomass pellet boiler, wind turbines, higher than usual levels of thermal insulation, geothermal heating, compostable toilet, electric car charging stations. These features will need to be evidenced in the plans/costings. An ERC only applies if you refinance with another lender during the incentive period; if you finish early, you can switch to our residential range ERC free for a residential mortgage product subject to receipt of the final completion certificate.