The £18.8bn of remortgaging in the year was 8.3% more than in 2017.
In 2018 there were a total of 60,400 new homeowner remortgages in London, 6.2% more than in 2017.
This is the highest annual number of remortgages in London since 2008, when this figure stood at 111,900.
The £18.8bn of remortgaging in the year was 8.3% more than in 2017.
Jackie Bennett, director of mortgages at UK Finance said: "Remortgaging in London reached its highest level in a decade last year, as customers locked into competitive deals and a large number of fixed rate loans came to an end.
"First-time buyer numbers increased for the third year running in 2018, despite a sluggish first quarter. However, affordability remains a challenge for many potential buyers in the capital, underlining the importance of schemes such as Help to Buy."
There were 15,000 new homeowner remortgages in London completed in Q4, 2.7% more than in the same quarter a year earlier.
There was £4.6bn of remortgaging in Q4, up 1.8% year-on-year, the fourth quarter was 1.8% more year-on-year.
There were 7,400 new homemover mortgages completed in London in the fourth quarter of 2018, 1.3% fewer than in the same quarter of 2017.
The £3.1bn of new lending in the quarter was 3.3% more year-on-year. In 2018, there were 28,800 new homemover mortgages, 5% less than in 2017. The £12bn of new lending was 1.9% less than in 2017.
There were 11,000 new first-time buyer mortgages completed in London in the fourth quarter of 2018, 5.8% more than in the same quarter of 2017.
The £3.2bn of new lending was 7.4% more year-on-year. In 2018, there were 42,800 new first-time buyer mortgages, 0.5% more than in 2017. The £12.6bn of new lending was 2.6% more than in 2017.
