Define the Sammamish market before choosing sales
Sammamish contains north and south plateau markets, newer subdivisions, established homes, larger lots, lake influence, and territorial views. Similar square footage does not make two homes equivalent when site utility, construction generation, quality, or view differs materially.
Open the county property record and residential area report before searching for sales. Confirm property type, living area, age, quality, condition, lot, view, and major improvements so the search starts from accurate facts.
Focus the evidence on real value drivers
Use a small set of arm's-length sales near the valuation date and make the comparison auditable. For every sale, identify the price, date, location, property type, size, condition, land characteristics, and any important feature that differs from the subject.
- Compare homes from a similar subdivision generation and quality tier.
- Describe lake, mountain, or territorial views by quality and permanence.
- Separate gross lot size from usable yard area where slope or restrictions matter.
- Verify finished basements, remodeling, condition, and garage capacity.
Explain weak matches instead of hiding them
A sale across the plateau may need substantial explanation when school access, subdivision amenities, view, traffic pattern, or effective age differs. Select the most similar market evidence rather than the lowest prices available.
A fair analysis also acknowledges evidence that supports the county value. Removing inconvenient sales without a market reason can weaken credibility, while a clear superior-or-inferior comparison helps connect the evidence to one requested value.
Protect the King County filing window
Sammamish-area notices listed for August 6 and August 13, 2026 correspond to appeal deadlines of October 5 and October 13, respectively.
Use the mailing date printed on the parcel's notice and confirm the deadline in the official filing system, especially if the parcel received a replacement notice.
An informal assessor conversation does not replace a timely Board petition. Save the notice, final petition, exhibits, and submission confirmation, then calendar any later evidence or hearing dates.