The growth is almost double that between 2013-14, when mortgage advances increased by 8%.
The society also saw growth of 7.8% from £34.6m to £37.3m in pipeline mortgage business. Net interest income also rose from £5.72m to £6.16m.
Just 11 borrowers in arrears of one month or more, or 0.2% of all borrowers. This is a decrease from 0.4% in 2014.
Chris White, Hinckley & Rugby, CEO, said: “To have achieved growth in advances, deposits and margin in a highly competitive market does great credit to the society and its staff.”
Nigel Frostick, chairman at the society, said: “We remain confident that the society’s high quality balance sheet, robust capital ratios and careful approach to managing risk will continue to underpin its financial strength and place it in a strong position to continue to grow.”
