Homeownership remains cheaper than renting nationally and in all of the 100 largest metro areas. Rising mortgage rates and home prices have narrowed the gap over the past year, though rates have recently dropped and price gains are slowing. Now, at a 30-year fixed rate of 4.5%, buying is 38% cheaper than renting nationally, versus being 44% cheaper one year ago.

The rent versus buy math is different in each local market. Buying ranges from being just 5% cheaper than renting in Honolulu to being 66% cheaper than renting in Detroit. But even for a specific market, the cost of buying versus renting depends on how much home prices rise (or fall) after you buy. Our model assumes conservative home price appreciation, but – as we all know after the last decade – home prices can unexpectedly rocket or plummet. This edition of Trulia’s Rent vs. Buy Report focuses on how different home price assumptions can affect the math for someone deciding to buy or rent today.