The rent survey nobody runs before bidding on a pre-foreclosure is the one that would have changed the deal
Pre-foreclosure buyers tend to lean on the same comp set a listing agent would use: closed sales within a half mile, adjusted for condition, run backward from an ARV. That math is tight and most people do it carefully. The assumption doing the real work sits upstream of all of it, which is what a tenant in this specific building, on this specific street, will actually pay the day the unit turns.
Familiar is not current. A broker who has worked a neighborhood for eight years knows what rents used to clear. The question is what a fresh survey of available units within a quarter mile shows right now, not what the trailing twelve months of signed leases says in a market that moved. In a softening submarket those two numbers can be forty dollars a month apart. At a six cap, forty dollars a month is eight thousand dollars of value. That gap is not abstract on a pre-foreclosure where the bid has already been sharpened past comfort.
The case worth studying is a two-unit bought with rents underwritten at 1,050 per side, based on a broker's verbal and one Zillow comp from four months prior. Current inventory within three blocks showed eight available units at 980, two of which had been sitting for six weeks with a free-month concession attached. Effective rent was closer to 940. The underwriting assumed 2,100 in gross monthly income. The building stabilized at 1,880. That is 220 dollars a month, 2,640 annually, and at the cap rate used to set the bid, roughly 44,000 dollars of value the buyer paid for and did not receive.
Running that survey before the wire means calling the numbers on the active listings yourself, noting days on market, asking whether concessions are in play, and weighting anything over thirty days on market at the concession-adjusted figure. It takes two hours. The cost of skipping it is priced into the deal permanently.
What does your current process look like for verifying rents before you bid, and are you pulling active listings or relying on closed lease comps?