Mercer Island Market Pulse
Four indicators that tell you where the Mercer Island residential market is heading — sourced directly from NWMLS and refreshed monthly.
A headline number rarely tells the whole story.
Scroll down for the complete view — every chart, every data point, three full years of context. Because the difference between a good decision and a great one is almost always in the trendline beneath the number.
See all graphs & dataSource: Northwest Multiple Listing Service® via InfoSparks (ShowingTime). Residential sales, Mercer Island segment. Reported figures are NWMLS data and are not guaranteed. Equal Housing Opportunity. Matthew Konsmo · Coldwell Banker Danforth.
May 2026 — Matthew’s Analysis of the Mercer Island Market
In May 2026, the median sales price across Mercer Island residential came in at $2.62M, down 3.1% from the month prior, while the median price per square foot stood at $742. Year over year the median is up 4.7%, a signal of underlying price support in this market.
On the supply side, Mercer Island saw 42 new listings come to market in May 2026, against 54 homes for sale at month end. Active inventory is down 18.2% from a year ago, keeping the field of choices tighter than last year. At roughly 3.2 months of supply, that points to a relatively balanced market by the conventional rule of thumb (under three months favors sellers, over six favors buyers).
Demand stayed active: 24 pending sales and 26 closings in May 2026. The median home took about 9 days to sell — a fast pace that rewards prepared buyers. Sellers are realizing about 97.9% of their original list price — very close to their original asking price.
Taken together, the ten indicators describe a balanced Mercer Island market. Pricing has held up year over year, while inventory and pace are the levers worth watching month to month. For a buyer or seller weighing a move, the right read is rarely a single headline number — it is the direction these series are trending together, which is exactly what the full charts below lay out.
Source: Northwest Multiple Listing Service® via InfoSparks (ShowingTime). Residential sales, Mercer Island segment. Analysis by Matthew Konsmo · Coldwell Banker Danforth. Figures are NWMLS data and are not guaranteed.
Mercer Island Housing Market Trends & Residential Sales Data
Thinking about buying or selling a Residential home on Mercer Island? This page tracks the Mercer Island real estate market using live Northwest Multiple Listing Service (NWMLS) data—updated monthly with median sale prices, days on market, closed sales, and inventory levels.
Because Mercer Island sits in Lake Washington between Seattle and Bellevue in King County—a sought-after, largely single-family community where waterfront and view homes command significant premiums, town-center living offers a different profile, and island supply stays constrained—tracking localized data is essential for understanding general market direction. Whether you are timing a purchase or preparing to list, the data below provides a clear, objective look at current market conditions.
Looking for a more localized market perspective? Explore our hyper-local neighborhood guides for a micro view of specific real estate markets across the island, from the North End, South End and Town Center.
Buying or selling a condo on Mercer Island? Condo Market Trends >
Why Direct Comps Reign Supreme
While median and average prices are useful for identifying broad market shifts, they are often too “macro” when you are trying to value a specific front door. To find the true market value of a Mercer Island home, nothing beats a direct comparable (comp).
Contact Matthew for a Comparable Market Analysis on your home >
Direct comps account for the critical nuances that broader statistics completely ignore:
Hyper-Locality Matters
Mercer Island is the perfect argument for looking past a ZIP code—the entire island shares one (98040), yet values vary enormously across it. West-side homes capture Seattle skyline and sunset views, while the east side looks toward Bellevue, the Cascades, and the sunrise; that orientation alone can move value beyond 5% to 10%. Lake Washington waterfront with a private dock is a market unto itself, and walkable proximity to the Town Center—now served by the 2 Line—commands its own premium. North end, south end, waterfront, and interior all behave differently. A single islandwide average can’t see this; a direct comp reflects the reality of the specific lot and outlook.
Accounting for Quality and Finishes
Broad data points can’t distinguish between builder-grade finishes and high-end custom upgrades. Whether a home features standard laminate or custom mitered-edge quartz, direct comps allow for “line-item” adjustments. Mercer Island is an active teardown-and-rebuild market, so an original mid-century home and a ground-up modern build can sit on comparable lots at very different values—and on waterfront, frontage, dock, and orientation must each be weighed on their own. Line-item adjustments ensure the premium investments made in a home are actually reflected in its valuation.
The “Vibe” Factor
Statistics often treat square footage as equal, but buyers don’t. A 1960s daylight rambler held for decades and a 2026 modern build might share the exact same footprint, yet they appeal to entirely different buyer pools. Using direct comps ensures you’re comparing “apples to apples” by matching the architectural style, character, and lifestyle appeal of a property.
The Bottom Line: If you want to know what a home is worth in today’s market, look past the ZIP code averages and focus on the three or four most similar properties that have closed nearby. That’s where the real data lives. Get the facts behind your home’s value. Contact me for a personalized CMA based on your Mercer Island property’s specific characteristics and current market data.