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In fairness, I would think humans include nearby home prices as one of their parameters as well.

• LanceH 5y ago
  A Broker Price Opinion (BPO) is typically set by appraisal, comparable sales and comparable listings. Depending on how cookie cutter the neighborhood is, there are many different levels of "appraisal" from drive by photos to a deep inspection.
• KingMachiavelli 5y ago
  Human/realtor appraisals are often very poor. They will take 3-4 nearby & similar homes and basically add/subtract the differences from the home they are comparing. Then they basically just average the adjusted sale prices. They might add a bit onto that price since prices go up over time. So this has some obvious issues: * Areas without a ton of very similar houses that have also sold recently will basically have no 'comps' to use. * It's really easy to keep identifying differences (pros/cons) until the adjusted prices equal each other but it's hard to know if all of the meaningful differences have actually been identified. * It gives average homes and average buyers a huge advantage. This model assumes that the housing market is hot but not hot enough that someone will pay 10-15% more for some specific feature. Anything unique to a home/property is only going to be worth a fraction of the time & money it would cost to add. Anything super common (kitchen remodel, finished basement, etc.) can actually add 100% or more of it's cost to the houses value because the buyer is paying with 5x or more leverage so paying a bit extra to have it included. This is also why it's often better to fix a few things as the seller than give a discount on the sale price - the buyer will often pay a premium to get things move-in ready since it doesn't impact their monthly costs significantly.