The lender said the latest additions to its buy-to-let range included a market-leading rate for House in Multiple Occupation (HMO) products.

And it revealed the deals, which had rates starting at 3.99% and were fee free, would be available for portfolio landlords for purchase and remortgage with £350 cashback.

The aim of these products, ultimately, was to encourage landlords to invest in energy efficient properties and boost the number of A to C rates homes in the private rented sector (PRS).

According to Paragon, the number of properties in the PRS with an energy rating of between A to C has increased by 272% over the past decade to 1.8 million, but approximately six out of 10 homes in the sector are still at grades D or below.

Richard Rowntree, Paragon Bank managing director of mortgages, said: “Landlords have made great strides in adding more energy efficient homes to the PRS – or upgrading properties to C or above standard – over the past decade.

“However, more needs to be done as the Government moves towards its net zero carbon target by 2050 and landlords have a key role to play in that.

“Our new range of products at 80% LTV for homes with an energy rating of C or above will be an incentive for landlords to add energy efficient homes to the sector, benefitting tenants through lower energy bills and the environment through reduced consumption.”

Under Government proposals, homes in the PRS will need a minimum EPC rating of C for new tenancies by 2025 and all homes in the sector will require this rating by 2028.

To support landlords upgrade existing properties with an EPC rating of D or below, Paragon launched its Green Further Advance product in February.

Rowntee added: “If landlords are to improve the energy efficiency of PRS stock, they need the finance to enable them to do so. Making sure there are attractive options to add new stock, whilst recognising the efforts to upgrade existing properties, is an important element of this.”