Landbay had a record month of buy-to-let lending in September with £6.31m being lent across 31 mortgages.
Landbay said lending rose due to inflows through the Innovative Finance ISA and institutional investment on the peer-to-peer lending side.
The lender has also made five new appointments, including James Cooper-Smith and Joela Jenvey as senior lending officer and key account manager respectively on the lending team.
John Goodall, chief executive and founder of Landbay said: “Over the past four years we have invested a lot of time and money into building a platform that we can be proud of.
“Like any fast rising new entrant, we’ve experienced some growing pains along the way, but our track record speaks for itself and we now have all the building blocks in place to support continued expansion of the company.”