Figures from the estate agent show that the percentage of buy-to-let mortgages processed in May reached 19.6%.
Around two out of three landlords were also now choosing fixed-rate products, with over half choosing two year deals.
David Miles, managing director of haart Financial Services, said: “With the base rate continuing to remain at a record low, more people than ever are choosing buy-to-let property as alternative to other forms of investment, driven in part by the healthy yields they can achieve.
“This is being helped by increased competition between lenders and with it an ever growing availability of products for this particular segment of the market – something which we as company certainly welcome.”
