Advances were £46.2m in the six months from December to May, up 68.6% on the £27.4m advanced in the same period a year before.
The society predicts total mortgage advances of £92.4m, based on the total advanced in the first half of the year, up on the previous year’s £76.8m.
Its total mortgage book is now £433m and it is targeting 4% growth to £440m by the end of the year.
Chris White, chief executive of Hinkley & Rugby, says: “While the low base rate continues to constrain the room for manoeuvre for all building societies, Hinckley & Rugby is performing well as we step up the gears of more lending. Our customers, new and existing, remain highly satisfied with our commitment to exceptional service.”