I think this is something that is often forgotten from the raw sales value numbers. House prices appreciate but at the same time significant money is invested i

I think this is something that is often forgotten from the raw sales value numbers. House prices appreciate but at the same time significant money is invested into their maintenance and improvements. A house where no maintenance is done will probably depreciate in value as the building deteriorates. It would be great to see an index of property prices deducting the cost of maintenance and improvements. This is a bit like share indexes where the added value of dividends is included.