Taxation policies vary considerably between countries, so it is virtually impossible to say anything that will be universally useful. However, it is common for income generated by capital gains to not be subject to taxation until the date that the asset is actually sold, and sometimes not even then. North American home owners usually find that when they sell personal residences, capital gains that occur are exempt from taxation. It appears that other countries treat sale of homes differently, taxing people on such gains. German authorities, for example, tax those gains only if you owned the property for less than ten years.

Chris Browne has a story from his professional tax preparation days where a family sold a farm, and expected a considerable tax bill that turned out to be virtually nil due to having owned the property before 1971 (wherein lies a critical "Valuation Day" date in Canada) and due to it being a dairy farm, with some really peculiar resulting deductions. The point of this story is that while the presentation here is fairly simple, taxation often gets terribly complicated...