Pull up the same Fort Washington address on two different sites this week and you may see two different stories about what the town is worth. One person searching in early August sees a smoothed value estimate hovering just under $460,000. Another, looking at what actually closed a few weeks earlier, sees a median north of $510,000. Neither is wrong. They're measuring different things, and the gap between them is the most useful piece of market information a Fort Washington buyer or seller can have right now.
This isn't a data glitch. It's a map of where the buyer pool actually sits in a zip code that spans modest interior ramblers built decades ago and gated waterfront townhomes going up blocks from National Harbor. Once you know which pole you're closer to, the "median price" question stops being confusing and starts being useful.
The three numbers, side by side
As of the most recent reporting available this summer, here's what three major portals were each showing for Fort Washington:
| Source | What it measures | Figure | Time window | Year-over-year |
|---|---|---|---|---|
| Zillow's home value index | Smoothed estimate of every home's value, listed or not | $458,443 | as of June 30, 2026 | down 0.4% |
| Redfin | Median price of homes that actually closed | $514,692 | May 2026 | down 3.8% |
| Movoto | Median price of homes currently listed for sale | $484,000 | June 2026 | down 6% |
Add a fourth data point from active MLS inventory: across roughly 221 listings tracked in Fort Washington in early August, the average asking price sat above $520,000. That's four different numbers, all describing the same town, all technically accurate.
The reason they diverge isn't mysterious once you separate what each one is built from. Zillow's index models the value of every home in the market whether it's for sale or not, which smooths out the effect of any single expensive closing. Redfin's median only counts homes that actually sold in a given month, so if a handful of higher-priced properties happen to close together, the median jumps even if nothing else in the market changed. Movoto's figure tracks what sellers are asking right now, not what buyers end up paying. None of the three is measuring the same population of homes.
Why the closed-sale number runs so far ahead
The likeliest explanation for why Redfin's closed-sale median sits nearly $60,000 above Zillow's broader value estimate is a mix-shift problem, not a market swing. Fort Washington's zip code includes a genuinely bifurcated housing stock. On one end are older detached homes on interior streets, the kind that make up most of the town's inventory and anchor the lower, smoothed valuation. On the other end is a cluster of newer luxury construction near National Harbor, most visibly the gated Potomac Overlook community, where four-level townhomes with rooftop terraces and Potomac River views have been selling well into the $700,000s and beyond. One end-unit there recently listed with more than 3,600 finished square feet across four levels, water views from every floor, and sightlines to the National Harbor Ferris wheel and the Woodrow Wilson Bridge.
When even a small number of those waterfront closings land in the same month as a batch of more modest interior sales, the median sale price gets pulled upward in a way that has nothing to do with how the broader market is trending. A buyer comparing a rambler on the interior side of town to Redfin's $514,692 median is comparing against the wrong population of homes entirely. The National Harbor Owners Association describes Potomac Overlook as the area's premier gated townhome community, and it functions in the price data almost like its own micro-market sitting inside Fort Washington's zip code rather than blending smoothly into it.
The tax bill is a fourth number, and it's not measuring the market at all
Sellers pricing a listing off their most recent property tax assessment should know that figure is measuring something different still. Fort Washington falls into the group of Maryland jurisdictions the state reassessed for the 2026 tax year, and residential properties in that group rose an average of 13.2 percent in assessed value statewide, according to the Maryland Department of Assessments and Taxation's own release. That increase gets phased in over three years rather than hitting all at once, and homeowners with the Homestead Tax Credit on their principal residence have their annual taxable increase capped at 10 percent regardless of how much the underlying assessment moved.
The practical takeaway: a rising tax assessment this year says nothing about whether the sale-price side of the market is hot or cooling. Prince George's County property owners can look up their own notice details directly through the state's assessment records, and the increase reflects a three-year lookback on sales, not a snapshot of this month's buyer demand.
The due diligence question none of these numbers answer
Here's something a median price, a list price, or a tax assessment will never tell you: whether the sewer infrastructure serving a specific street is under strain. This matters more than it sounds like it should for anyone shopping the waterfront corridor near Broad Creek, Swan Creek, and the Tantallon area.
Public records show two separate sanitary sewer overflow events tied to this collection system within about ten weeks of each other this year. On May 31, 2026, an overflow at the Piscataway wastewater collection system released roughly 80 gallons near Alcoa Drive into Broad Creek, attributed to roots and grease in the line. Then on August 6, 2026, WSSC Water crews responded to a larger overflow at the Swan Creek Wastewater Pumping Station on West Tantallon Drive, caused by a break in a temporary bypass pipe connected to the force main. That one released an estimated 150,300 gallons of untreated wastewater into a storm drain discharging to Swan Creek before crews stopped it about an hour after it was detected.
Neither event is unusual enough to avoid the area outright, and WSSC's own public reporting shows both were identified and resolved quickly. But it's the kind of local infrastructure detail that a median price can never surface, and it's specific to homes served by this particular pumping station, not a general statement about Fort Washington as a whole. Anyone considering a purchase in that waterfront pocket has a few concrete questions worth asking before writing an offer:
- Is the home connected to WSSC public sewer through this collection system, or does it rely on a private on-site system, and can the seller produce the connection record
- Has WSSC logged any sanitary sewer overflow or emergency bypass work near this specific address in the past year, since WSSC's incident reports are public
- If the property sits near a shared pumping station or force main, what work has been done recently, since capacity issues at one station affect an entire street rather than a single lot
These aren't questions a standard home inspection will always surface on its own, and they're worth raising directly with a listing agent or through the seller's disclosure process.
FAQ
Which of these numbers should I actually use to price an offer or a listing? Match the number to the type of home. If you're comparing an interior, non-waterfront property, the median list price and the smoothed value index are closer proxies for what similar homes are actually worth. If you're looking at a National Harbor-adjacent gated community like Potomac Overlook, the closed-sale median is doing a better job of reflecting that submarket, because that's where the higher closings are concentrated.
Does the 13.2 percent statewide reassessment mean my Fort Washington tax bill is jumping that much this year? Not necessarily and not all at once. The increase is a statewide average for the reassessment group that includes Prince George's County, it gets phased in over three tax years rather than applied immediately, and homeowners with the Homestead Tax Credit on a principal residence have their annual taxable increase capped regardless of the underlying assessment change.
Where this leaves you
A single "median price" for Fort Washington was never going to tell the whole story for a zip code with this much range in it. The useful move isn't picking the number that sounds best. It's figuring out which population of homes you're actually shopping against, checking the infrastructure history if you're near the water, and treating your tax notice as a separate conversation from your sale price.
If you're trying to figure out where your own Fort Washington home or target property actually lines up against these numbers, Yolanda Burgess can walk through the comparison with you directly. Schedule a free consultation and get a read on the market that accounts for which side of town you're really comparing against.
