The lender confirmed it has issued over £227.7m this year and is performing at its best levels since 2008.
The specialist lender issued terms on £60.3m of new business in the third quarter of 2012.
Roger Dewsbery, senior underwriter at Crystal Mortgages, said: "It was a difficult quarter, and in line with the sector August was a very slow month, more so than usual. That said we had a good July and bounced back spectacularly in September, meaning we continue to trade at record levels.
"We expect our figures in the final quarter of the year to remain steady as the economy continues to fluctuate, and to achieve this we will continue to offer a full personalised service and range of products that are just not available anywhere else in the marketplace."