What does a Zestimate tell you?
A Zestimate can give you a place to begin looking into your home's value. It does not replace an appraisal report prepared for the use you have agreed on with an appraiser. Check the home details, the date and any range shown alongside the number. Even a very precise-looking figure does not guarantee a sale price or tell you the margin of error for your particular home.
Are the details about your home right?
Start with what you can check: the living area, property type, number of units and site details. Compare them with your records, and note additions or changes in condition. An older Snohomish home that has been substantially remodeled may be quite different from a nearby home of the same age. Likewise, a waterfront interest, a view and access to a public park describe different things.
Near Blackmans Lake, write down what your property actually has. Is it waterfront frontage, a view, or a documented right to use shared access? Washington Department of Fish and Wildlife lists public access at Ferguson Park on the southern shore and Hill Park on the eastern shore. Being near either park does not establish private lake rights. Keep access documents and records of shoreline improvements with your property information so a nearby public amenity is not confused with a right attached to your home.
You can also compare the home details shown online with the county property record and your addition or renovation records. If they disagree, note the exact difference. Do not assume the online estimate or the public record has captured every change.
What do error rates mean for your home?
A published error rate tells you how a group of estimates performed over a particular period. It cannot tell you how far your home's estimate is from its market value. The information available for listed homes may also differ from what is available for unlisted homes. Applying a published median error to your Zestimate would not give you a guaranteed dollar range for your house.
Why might value estimates differ?
When two estimates disagree, look at the information behind them. Do the completed sales resemble your home in type, condition, size and setting? Do they fit the date you need valued? Different property details, sales and assumptions can produce different numbers. Bring the conflicting details or sales to the conversation and ask what explains the difference. You do not have to resolve it yourself before requesting help.
What if you need a value for an estate or divorce?
If you need a value for an estate or divorce, first ask the person who needs the report what it must cover. A current automated estimate may not tell you what the home was worth on an earlier date. An appraiser can work with you to agree on the date and purpose, then explain the value through evidence and stated assumptions. Your legal or tax outcome remains a separate question; the appraisal does not decide it.
What should you share before requesting a report?
Share the address, why you need a value, the date it should describe and your deadline. Include records or sales you would like the appraiser to consider. If the report concerns a lender, confirm how it must be ordered before paying for a private report.

