Net advances hit £788 million in April, up significantly from £682 million in March.
However, approvals (loans agreed, but not yet made) fell slightly to £3,358 million in April, from £3,417 million in March.
Adrian Coles, director-general of The Building Societies Association said: "Mortgage lending is the highest for thirteen months - a clear indication that borrowers are returning to building societies as they search for the best deal. Commitments outstanding - that is pipeline for future loans - are 34 per cent higher from a year ago, suggesting that this success will continue."
