The lender now offers 2- and 5-year residential fixed rate mortgages covering Platinum, Prime, Prime Plus and Near Prime credit profiles.
Following the move, West One residential 5-year fixed rates starting at 6.84% and 2-year fixed at 7.21%.
The specialist lender launched into the residential market for the first time in October last year with mortgages aimed at those underserved by high street lenders.
The changes come as West One adds three new senior hires to its residential mortgage division.
Steve Mannakee, who has more than 25 years' experience in the sector and joins from Pepper Money, has been brought on board to grow West One's newly-launched residential offering and takes on the position of national account manager.
Katie Wild and Lizzie Fonseca have joined West One's residential and second charge teams.
Wild, who was previously a national account manager at Loans Warehouse, becomes a business development manager (BDM) for the South, while Fonseca, former head of sales at Loans Warehouse becomes broker support manager.
Marie Grundy, Managing Director Residential Mortgages and Second Charge division said: "When we launched into residential mortgages last year, we didn't want to be an also ran; we wanted to become a leading provider of specialist mortgage finance. That remains true today.
"We hope to achieve this through offering competitive products, sensible and bespoke underwriting and maintaining a continuous dialogue with brokers to ensure we offer what borrowers want.
"I'm confident we are building a reputation as lender in the residential market that is fair, flexible and competitive, and the reintroduction of our popular Platinum, Prime Plus, Prime and Near Prime fixed rate ranges builds on that."
Grundy added: "Any lender is only as good as the people driving forward. And in that respect, I'm delighted with the residential team wea re building here at West One.
"Steve, Katie and Lizzie are all exceptionally talented, experienced and driven individuals who will paly a major part in the success of West On'es residential growth story over the coming years and I am thrilled to welcome them on board.
"We have the funding, product offering and the experience in place to make a huge splash in this area of the market in the coming months and years. Watch this space."
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