Is it a bad idea to take out an ARM on a new-build purchase if home prices might drop from their current peak?

An ARM isn't automatically a bad idea here; the piece that matters most is the length of the fixed period. Most borrowers who take an ARM today choose a seven- or ten-year fixed period before the first possible adjustment, rather than a loan that moves after one year. Over that stretch you pay down a meaningful chunk of the balance, and prices have room to recover from any near-term correction, so a temporary dip in value is much less of a threat by the time an adjustment could arrive. We've personally carried a longer-term ARM that happened to adjust downward when rates fell during its window. That was a good outcome, and it's exactly the kind of thing nobody can promise. Rate direction at your adjustment date is unknowable. Two practical points: - Worried about prices or far-out rates? Lean toward the longer fixed period. A ten-year over a seven-year buys you more runway. - If the price-decline worry is really driving the decision, the cleaner answer may be to revisit the timing of the purchase itself rather than solving a price concern with loan structure. Buy when it's the right time in your life. Match the fixed period to how long you plan to hold the home and you take most of the risk off the table. And run the worst-case adjusted payment before you sign, so you know you could live with it.