The offerings were originally due to end on 4 November.
Moreover, the products include a 90% LTV 5-year fix at 3.79% and a 90% LTV 5-year fix at 3.89%.
Both deals include a £995 product fee and free valuation, while the former offering is available for loans up to £500,000 and the latter product is available for loans between £500,001 and £600,000
Furthermore, to be eligible at least one applicant must be a first-time buyer.
Jeremy Duncombe, director of intermediary Ddstribution at Accord Mortgages, said: “Since launching on Monday morning, we have seen the positive impact our increased capacity has had on service levels.
“The recent changes we made to LTI caps, as well as having a boosted underwriting team means we are ahead of where we planned to be and so have made the decision to extend the offering for longer. We hope advisers can support more clients get the homes they want.”