Growth has rocketed by 67.88 per cent year-on-year to total £150.9m in May, industry figures from Loans Warehouse showed.
Month-on-month lending jumped by 7.47 per cent. There were 3,078 completions during the month which was a three per cent uptick on April.
Lending in the year to date has reached £834m, well over double the £389m by the same point last year.
The largest driver for loans was consolidation and home improvements.
May also saw an improvement in lender completions times, down from 22 to 15 days.
Recent data from the Finance and Leasing Association has also painted a picture of a booming second charge market.
Rising house prices have helped more people use their homes for second charge.
Higher interest rates mean a full remortgage can also be a less attractive option now than second charge.