uk homes hit £3.3 trillion total the value of the uk s housing stock reached the £3.3 trillion mark in 2004 - triple the value 10 years earlier  a report indicates.  research from halifax  the country s biggest mortgage lender  suggests the value of private housing stock is continuing to rise steadily. all regions saw at least a doubling in their assets during the past decade. but northern ireland led the way with a 262% rise  while scotland saw the smallest increase of just 112%.  the core retail price index rose by just 28% in the same period  underlining how effective an investment in housing has been for most people during the past decade. more than a third of the uk s private housing assets - representing more than a trillion pounds in value - are concentrated in london and the south east  the halifax s figures indicate. tim crawford  group economist at halifax  said:  the value of the private housing stock continues to grow and the family home remains  by a large margin  the most valuable asset of the majority of households in the uk.  halifax s own monthly figures on house sales - issued on thursday - suggest the average price of a british property now stands at £163 748 after a 0.8% rise in january. housing experts are split on prospects for the market  with some saying price growth will slow but not fall  while others predict a sharp drop in values.