Seattle condo guide
Seattle Condo Property Tax Appeals: Unit-Level Evidence Matters
Condo appeals require evidence for the same ownership interest. A sale or assessment for an entire parcel, commercial component, or materially different unit can mislead even when it shares the building address.
By Homespring · Published and last verified August 15, 2026
Quick answer
Start with recent arm's-length sales of comparable units in the same building when available. Then expand carefully to similar nearby buildings while accounting for floor, view, size, parking, storage, condition, and amenities.
Confirm the assessor record describes your unit
Check the parcel number, unit size, use, parking or storage interests, and recorded characteristics. A mismatch between the unit and the assessed ownership interest should be resolved before comparing values.
Prefer unit sales that share the same value drivers
Sales in the same building often control for location and common amenities, but they are not interchangeable. Floor height, orientation, view, renovation, outdoor space, parking, and special assessments can materially change value.
- Use similar unit size and bedroom count.
- Separate materially different view and floor premiums.
- Document interior condition and renovation differences.
- Verify parking and storage rights.
- Explain unusual HOA or building conditions with reliable documents.
Avoid parcel-versus-unit comparisons
A whole-building or combined-parcel transaction is not a substitute for an individual unit sale. Confirm that every comparable and the subject assessment refer to equivalent property rights.
When same-building sales are scarce, use nearby projects with similar construction, amenities, age, and market position, then explain the remaining differences directly.
Primary sources
Check the property itself
Start with the Seattle or King County address before spending time on a petition.