Borrowers with a 5% deposit can access a 4.34% rate fixed for two years, with no product fees, free valuation and £250 cashback on completion.
For those with a 10% deposit, the Chelsea is offering a two-year fixed rate at 2.99%, with a £345 product fee.
Brendan Gilligan, Product Manager at Chelsea Building Society, said:
“We understand the issues first-time buyers can have when trying to get a foot on to the property ladder. This is why we offer mortgages to borrowers who have just a 5% deposit and why we always strive to make our rates as competitive as possible, particularly for this group.”