New mortgage lending to residential property investors fell in January and, surprisingly, so did lending to owner-occupiers.According to the latest Australian Bureau of Statistics housing finance figures, the value of new mortgage lending fell 3.4 per cent in January, compared with the previous month (in seasonally adjusted terms).The value of new lending to owner-occupiers fell 4.3 per cent in January, compared with the previous month, and the value of new lending to investors fell 1.6 per cent.Total mortgage lending in January was worth A$31.9 billion - an increase of just 2.7 per cent over the value of new lending in January last year.CoreLogic pointed out in a note that the January fall was the biggest January fall since 2011 and is part of a "clear downward trend".The number of new loans was also down in January.The average loan size was $372,400 - down from $377,800 the previous month.