I live in a blue collar neighborhood of a west coast city. I’ve done extensive work to update my home, I’ve added features like central air, new floors, new lighting, and landscaping. It’s like a new house (though it was built in 1955). Both Zillow and Redfin tell me my house is worth roughly double of what I paid for it in 2015. That’s without even considering the upgrades I’ve done. A 10% drop from the current estimate is meaningless when most homes are worth 50-150% more than what they were worth 10 years ago.