King County, WA Average Home Price (2026)
The average home price in King County, Washington is about $812,500 (the 2026 median across 80 ZIP codes, at ~$484/sq ft) — 62% more expensive than the Washington median and 181% more expensive than the typical U.S. home.
How King County compares
King County is relatively expensive for housing nationally: its typical home costs $812,500 against $501,000 for Washington and $289,000 for the U.S. Within the county, ZIP-level values run from about $425,000 to $4,476,000.
| Area | Typical value | $ / sq ft |
|---|---|---|
| King County | $812,500 | $484 |
| Washington | $501,000 | $312 |
| United States | $289,000 | $193 |
Cities in King County
Cities with their own home-value page, largest first:
King County home prices by ZIP code
The 15 most valuable ZIP codes in King County (of 80 with data):
| ZIP code | Typical value | $ / sq ft | vs county |
|---|---|---|---|
| 98039 Medina | $4,476,000 | $1282 | +451% |
| 98040 Mercer Island | $2,213,000 | $776 | +172% |
| 98004 Bellevue | $1,913,000 | $941 | +135% |
| 98075 Sammamish | $1,703,000 | $574 | +110% |
| 98006 Bellevue | $1,533,000 | $587 | +89% |
| 98033 Kirkland | $1,518,000 | $744 | +87% |
| 98005 Bellevue | $1,502,000 | $606 | +85% |
| 98074 Sammamish | $1,471,000 | $562 | +81% |
| 98077 Woodinville | $1,423,000 | $560 | +75% |
| 98053 Redmond | $1,370,000 | $556 | +69% |
| 98050 Issaquah | $1,344,000 | $457 | +65% |
| 98112 Seattle | $1,322,000 | $704 | +63% |
| 98008 Bellevue | $1,291,000 | $659 | +59% |
| 98052 Redmond | $1,255,000 | $581 | +54% |
| 98072 Woodinville | $1,227,000 | $547 | +51% |
Home value appreciation in King County
Home prices in King County have risen about 101% over the last 10 years (≈7.2% a year) and +138.7% over 20 years, according to the FHFA house price index through 2025. The most recent year came in at +0.9% — roughly flat. A home worth $812,500 today was worth roughly $405,035 ten years ago.
See where that trend takes a specific home with the home appreciation calculator — statewide, Washington is +113.0% over the same 10 years. Past appreciation is a track record, not a forecast; local prices can fall.
Calculators for King County
Run the numbers for King County with the local rates already filled in — change any input to test your own situation.
Salary needed to buy a home in King County
To buy the typical $812,500 home in King County with 20% down, you need a household income of roughly $221,000 a year (about $5,160 a month for the mortgage, taxes, and insurance). With 10% down the bar rises to about $263,000, because the loan is bigger and mortgage insurance kicks in.
| Down payment | Cash down | Monthly payment | Income needed |
|---|---|---|---|
| 5% (+PMI) | $40,600 | $6,410/mo | $275,000/yr |
| 10% (+PMI) | $81,300 | $6,130/mo | $263,000/yr |
| 20% | $162,500 | $5,160/mo | $221,000/yr |
Assumes a 30-year fixed mortgage at 6.5%, property tax at 1.1% and insurance at 0.45% of value per year, PMI of 0.75% on loans with less than 20% down, and the standard 28% housing-to-income rule. Your rate, taxes, and HOA will move these — run your own numbers in the mortgage calculator.
What your budget buys in King County
At about $484 per square foot, here is roughly how much home different budgets get you in King County:
| Budget | Approx. size | What that looks like locally |
|---|---|---|
| $400k | 830 sq ft | below the local median — condos, smaller or older homes |
| $500k | 1030 sq ft | below the local median — condos, smaller or older homes |
| $600k | 1240 sq ft | below the local median — condos, smaller or older homes |
| $750k | 1550 sq ft | around the typical home here |
| $1.00M | 2070 sq ft | around the typical home here |
Wondering where that budget goes further? The relocation calculator ranks hundreds of U.S. cities by what the same money buys — it opens filtered to Washington.
Estimate a specific home in King County
Enter your ZIP and size for an instant estimate tailored to your exact area:
King County home prices: frequently asked
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Browse all Washington cities and counties, or look up price per square foot by ZIP code nationwide.
Directional estimates from public market data (Realtor.com & Zillow research; FHFA house price index; Census ZIP-to-county relationships), not appraisals.