Summary answer: A Zillow estimate drop usually reflects a recalculation based on nearby comparable sales, not a genuine decline in your home's actual value. Given the City of Fairfax's genuinely wide variance across sources ($717,000-$775,000 depending on measure), automated estimates here can be more volatile than usual.
I'm Johnny with JQ Real Estate. Let me explain what's likely actually happening.
Common reasons a Zestimate drops
| Reason | What's Happening |
|---|---|
| A nearby distressed or below-market sale | Pulls down the algorithm's comp pool temporarily |
| City vs. county data confusion | Some algorithms may blend City of Fairfax data with the much larger, pricier Fairfax County |
What actually tells you your home's real value
- A comparative market analysis (CMA) — pulls real, recent, comparable sales specific to the City of Fairfax, not the broader county
Get an accurate number, not an algorithm's guess
Reach out and I'll pull actual comparable sales for your specific home so you have a real answer.
For more Fairfax buyer and seller questions, visit our Fairfax real estate hub.