Paul Brett, business development director at Foundation, said the launch was widely anticipated by the market and would help the lender to grow its market share.
Foundation launched in February this year and has so far focused on lending to near prime landlords, first-time landlords and landlords up to age 85.
Criteria also include no minimum income requirements.
Earlier this month it was rumoured the lender also has plans to launch a mainstream mortgage range although it declined to comment at the time.
