Barclays is set to add a number of products within its Green Home Mortgage range on 28 April.
Notable additions include a 75% loan-to-value (LTV) 2-year fix at 1.74% and a 75% LTV 5-year fix at 1.88%.
Both offerings are for Help to Buy, include a £749 fee and a maximum loan value of £450,000.
A 90% LTV 2-year fix at 3.62% and a 90% LTV 5-year fix at 3.62% have also been added.
The two offerings are fee free and have a maximum loan value of £570,000.
The lender is also making a number of changes across its mortgage product ranges, including rate reductions to a selection of products within its residential purchase, remortgage and reward ranges.
A 70% LTV 2-year fix has been reduced from 1.44% to 1.35%, and a 75% LTV 5-year fix has been cut from 1.82% to 1.67%.
Both offerings are for residential large loan purchase or remortgage, include a £1,999 fee and a maximum loan value of £10m.
Within the residential reward range, a 60% LTV 2-year fix has been cut from 1.58% to 1.29%, and a 70% LTV 5-year fix has been cut from 1.43% to 1.35%.
The former deal is fee free, while the latter includes a £1,999 fee and both offerings have a maximum loan value of £2m.
Barclays has also extended the end dates on all its fixed rate products to 31 August.