Update, October 19, 2026: two data points have moved since this post published. Redfin's September 2026 reading puts the King of Prussia median sale price at about $511,000, up 4.3% year over year, which corrects the $570,000 figure cited below from an older Redfin snapshot. Mortgage rates held steady in the latest week: Freddie Mac's October 15 survey kept the average 30-year fixed at 7.40%, unchanged from October 8, with the 15-year at 6.71%. And roughly 13.5% of active 19406 listings now carry a price reduction, a clear sign the market has cooled further. See our new post on whether King of Prussia home prices are dropping for the full breakdown.
The short answer for October 2026 is that King of Prussia is still a seller-leaning market, but it is cooling in measurable ways. The latest published figures put the median list price near $549,000 with roughly 71 to 85 homes for sale and an average of 40 to 44 days on market, while Redfin still scores the area a very competitive 83 out of 100 and pegs the median sale price near $511,000 for September, up 4.3% year over year. Mortgage rates are the wild card: Freddie Mac's October 8 survey put the average 30-year fixed at 7.40%, the highest weekly reading since November 2023, and the October 15 survey held it there. This update walks through the newest numbers, what they mean for buyers, and the developments changing King of Prussia on the ground this fall.
Is the King of Prussia Market Slowing Down?
Yes, on the pace side, though prices have not cracked. Movoto's October 2026 figures show a median list price of about $549,000, down roughly 4% month over month and about 3% year over year, with an average list price near $559,000, or about $298 per square foot. Redfin's September median sale price for King of Prussia is about $511,000, up 4.3% year over year, and the 19406 ZIP median sits near $495,000 per PropertyIQ's August reading. The pattern across trackers is the same: list prices have ticked down from their 2026 highs, sale prices are holding, and homes are taking longer to sell than they did a year ago. That is the signature of a market normalizing rather than falling.
How Much Inventory Is on the Market Right Now?
Inventory is still thin but no longer record-tight. Movoto counts about 85 homes for sale in King of Prussia as of October, and months of supply, which measures how long that inventory would last at the current sales pace, ran from about 1.4 months in January to 2.4 months in February 2026, per local market reports. A balanced market is generally 5 to 6 months of supply, so King of Prussia still favors sellers, but the gap is closing. Buyers have more choices and more time than they did in the spring, when well-priced homes were gone within days.
How Fast Are Homes Selling?
Slower than a year ago, which is the clearest sign of cooling. Movoto's October data puts the average time on market at about 42 days, and Redfin's latest reading is near 44 days, roughly double the 21 days of a year earlier. Sale-to-list ratios still run near 100%, meaning homes close at or slightly above asking, so a well-priced listing in the Upper Merion Area School District still gets attention. The practical change is that buyers now have a realistic window to tour, inspect, and negotiate instead of writing offers sight unseen.
What Do 7.40% Mortgage Rates Mean for Buyers?
Rates are the biggest headwind in the market right now. Freddie Mac's October 8, 2026 survey put the average 30-year fixed at 7.40%, up from 7.28% the prior week and from 6.30% a year earlier, the highest weekly reading since November 2023, per Freddie Mac's Primary Mortgage Market Survey. On a median-priced $549,000 purchase with 20% down, the loan is about $439,000, and at 7.40% the principal and interest payment runs roughly $3,040 a month before property taxes, insurance, and upkeep. Fannie Mae's September forecast projects the 30-year to average about 6.8% in the fourth quarter of 2026, per forecast roundups, but actual readings have been running above that, so a sharp drop is not the base case. Many buyers are locking today's rate and planning to refinance if rates ease, rather than waiting out a market where prices are holding.
What Is Changing on the Ground This Fall?
Three developments are worth knowing. First, the two-year Route 202 sinkhole remediation near the mall is nearly complete, with PennDOT finishing its drilling equipment work, per the Philadelphia Inquirer's October 11 report, which ends years of detours along DeKalb Pike. Second, Toll Brothers is building 65 single-family homes and 206 townhomes at Stonebrook at Upper Merion on the former Glasgow Tract, the largest new-home pipeline in the township in years, per the King of Prussia District. Third, the planned Valley Forge Gateway Trail secured $450,000 in state funding in September 2026 to advance its North Gulph Road segment, bringing the future trail link between the Schuylkill River Trail, Valley Forge, and the Town Center a step closer.
So, Is It a Good Time to Buy in King of Prussia?
For most buyers, the honest answer is that the fall of 2026 is a better time to buy than the spring of 2026, with a caveat about rates. Inventory is up, homes are taking twice as long to sell, and list prices have softened from their highs, which gives buyers negotiating room that simply did not exist earlier in the year. The offset is the 7.40% mortgage rate, which raises the monthly cost of any purchase. If you can qualify comfortably at today's rates, the combination of a cooling market and Upper Merion's schools and location is attractive; if you are rate-sensitive, compare lenders, consider buying down the rate, and plan for a refinance when the market eases. Our posts on mortgage rates above 7% and the fall 2026 market update have the deeper rate and market detail.
What Does This Mean for a Buyer at 340 Anderson Rd?
For buyers looking at 340 Anderson Rd, the cooling market is mostly good news. This 4-bed, 3-bath, 3,482-square-foot custom home built in 2019 sits in Upper Merion Township with Candlebrook Elementary, Upper Merion Area Middle School, and Upper Merion Area High School, and it carries no HOA dues on top of the mortgage and tax bill. In a market where buyers have more time and more leverage, a turnkey custom build with modern systems, a chef's kitchen, and a fully fenced backyard stands out against older inventory. To see the current numbers applied to this property, or to tour it in person, contact Craig Lerch at eXp Realty.
