This increase saw Paragon complete £222.1m of buy-to-let mortgages during Q4, compared to £140.2m in the final quarter of 2014.
The business has also seen strong growth in its new business pipeline, which stood at £416.7m at 31 December 2014, which is up from £222.5m at the same time point last year.
John Heron, managing director of Paragon Mortgages, said: “We continue to benefit from an increase in the scale of our funding capability and, as a result of the deposit raising capability of Paragon Bank, improved diversity of funding.
“This has allowed us to continue developing our buy-to-let proposition for landlords and their intermediaries and we now have our most complete and competitively priced range of buy-to-let products.
“The fact that the pipeline continues to grow demonstrates well that the business has a good platform in place for further development through 2015.”