May 31st, 2006, 6:46 am
Firstly you can look at a sale and leaseback type argument, working out the NPV of future rent and mortgage payments etc. (Remember not to use LIBOR for your NPV, using the high street savings rates for your yield curve - this is for you the individual!)However, the big problem with housing is that it is probably the single largest completely imperfect market. Almost no too houses (goods) are the same, and information is severely limited. On top of that to buy and then sell a house is likely to cost you at least £10k on agents, solicitors, stamp duty, removal etc etc. So it is had huge amounts of friction. But worst of all houses do not trade together, and while the "average" value of a house may increase, your house could go through the floor.Taking all those into account you should expect a massive risk premium on a house. However there is one final sting in the tail. Not only is information shockingly poor, but the market is full of people who have no idea what they are doing, trade on whim and emotion, or have completely illogical criteria, on top of which the majority are not in it to make money.So... I think the best thing to do is compare the mortgage payments to the rent, and accept that some advantage of owning (i.e. getting the collateral, and possibility of value increase) cancels with the reduced market risk of renting. If you wish multiply the mortgage payments by 80% or something to compensate a little for getting more money in the long run. Then try to value the house yourself. What is it worth to you? Is it near a school you like for your kids, nice decor, nice pub, good size, garden etc etcIf you do want to look at it as an investment though, then a simple thing to do is work out the price increase you need in order to cover the moving costs in the time period you intend to stay there. Then ask if you think thats reasonable.