Offer your thoughts or opinion on the input financial query or topic using your financial background.

Why do some people say a house “not an investment”?
With an investment, you tend to buy it for a very specific purpose, namely to make you some money. Either via appreciation (ie, it hopefully increases value after you take all the fees and associated costs into account, you sell the investment, realise the gains) or via a steady cashflow that, after you subtracted your costs, leaves you with a profit. Your primary residence is a roof over your head and first and foremost has the function of providing shelter for yourself and your family. It might go up in value, which is somewhat nice, but that's not its main purpose and for as long as you live in the house, you cannot realise the increase in value as you probably don't want to sell it. Of course the remortgage crowd would suggest that you can increase the size of the mortgage (aka the 'home atm') but (a) we all know how that movie ended and (b) you'd have to factor in the additional interest in your P&L calculation. You can also buy real estate as a pure investment, ie with the only objective being that you plan to make money on this. Normally you'd buy a house or an apartment with a view of renting it out and try to increase your wealth both due to the asset's appreciation (hopefully) and the rent, which in this scenario should cover the mortgage, all expenses and still leave you with a bit of profit. All that said, I've never heard someone use the reasoning you describe as a reason not to buy a house and stay in an apartment - if you need a bigger place for your family and can afford to buy something bigger, that falls under the shelter provision and not under the investment.