Some good comments on the earlier post, better than it deserved.
I regret writing that mortgage lenders and owners are on the opposite end of a transaction. It is more apt to say, as Kevin Erdmann pointed out, that the house is financed with debt and equity. Both can earn a return.
Another commenter offered a numerical example. Let me riff off some of the numbers.
Suppose the house costs $200,000, it is 100 percent financed, and the mortgage rate is 4.0 percent. Then you can think of the interest expense as $8000. Pretend that it is the same for the owner-occupant as it would be for a landlord. Both the owner-occupant and the landlord can deduct the interest expense for tax purposes. They also can both deduct property taxes. I think that 3 percent is high, so I would go with something like 1.5 percent, or $3000.
If depreciation is 2 percent per year, it amounts to $4000, which is what the commenter suggested for repairs. Depreciation is tax deductible for the landlord but not for the owner-occupant. The commenter suggests that insurance is $1200, which again the landlord could deduct as an expense. If the landlord pays for utilities, then the landlord can deduct those as an expense. That might be another $2400 in deductions. Condo fees or Homeowners’ Association fees, if any, would work similarly.
If the price/rent ratio is 10, then annual rent is $20,000. If the price/rent ratio is 20 (high by historical standards), then the annual rent is $10,000. In any case, that is income to the landlord, who has to pay taxes on it. So overall, the owner comes out ahead.
Erdmann offers an interesting take on cities where supply is clearly constrained by regulation.
political obstacles to the allocation of capital into new residential housing has caused market prices to be wholly unmoored from replacement cost in those cities. In those cities, buying a house is like buying a taxi medallion. It is not so much a claim on shelter as it is a claim on political exclusion.
His point is the return on investing in housing would be more predictable, and much of the speculative aspect of home purchase would go away, if house prices were more closely tied to construction costs. And they would be more closely tied to construction costs if development were less constrained by regulatory restrictions.