Which number would you trust: the one that says Potomac home prices fell five percent this year, or the one that says they climbed more than one percent, over the very same twelve months?
Both numbers are real. Both come from the last few months of 2026. Redfin's tracking shows the median sale price in Potomac at $1.3 million over the three months ending in May, down about 5 percent from the same stretch a year earlier, with homes going under contract in roughly 22 days on about 3 offers apiece. Zillow's home value index for the same window shows the average Potomac home worth $1,343,739, up about 1.2 percent year over year. A third tracker, pulling June 2026 closings, put the median sold price at $1,242,000. Three credible sources, three different numbers, all describing the same ZIP code in the same season.
If you are comparing Potomac to other Montgomery County neighborhoods right now, this is the moment to stop asking "what's the median" and start asking a better question: which Potomac is that median actually describing? The answer changes what you should expect to pay, and it changes what a fair offer looks like once you have a specific address in front of you.
Why the Same Market Produces Different Numbers
A median sale price only counts what actually closed. If more entry-priced homes changed hands in a given quarter than luxury estates, the median drops even if every individual home held its value or gained. A home value index works differently. It estimates the worth of the entire housing stock, occupied or not, and averages across it. Redfin also reported that 175 homes sold in Potomac in May 2026, up from 125 the year before, a jump in volume large enough to shift what the median is measuring even if pricing power in any single neighborhood barely moved.
Neither number is describing a mistake. They are describing two different slices of the same market, and Potomac's housing stock gives them plenty of room to disagree, because "Potomac" is not one product. It is a collection of small, distinctly governed communities that happen to share a mailing address.
Which Potomac Actually Sold This Spring
Walk through four of the area's established neighborhoods and the spread becomes obvious.
| Neighborhood | Governance | What the price band actually reflects |
|---|---|---|
| Avenel | Community assessments tied to resident membership | A planned community on more than 1,000 acres with roughly 900 homes, anchored by the private TPC Potomac at Avenel Farm golf course, pools, and tennis |
| Potomac Falls | Voluntary HOA | 263 homes on lots of at least 2 acres, about a mile from Potomac Village, bordering C&O Canal parkland |
| Mazza Woods | Little to no HOA fee | Large wooded lots, custom colonials and contemporaries, fewer programmed amenities |
| Carderock | HOA-governed villages, several distinct sections | Colonial-inspired townhouses around $1.2 million to $1.4 million, single-family colonials $1.6 million to $2.2 million, and contemporary or Georgian estates from $3.3 million up to roughly $9 million |
Notice what is doing the work in that table. It is not school assignment or proximity to River Road, both of which vary less than people assume across these communities. It is governance and lot structure. A buyer targeting Avenel is really shopping for access, a golf membership and a maintained common area folded into that assessment. A buyer looking at Mazza Woods is shopping for privacy and acreage with almost no shared infrastructure to pay into. A buyer comparing Carderock townhouses to Carderock estates is technically shopping the same neighborhood name for two different products separated by several million dollars. Average all four together into a single "Potomac median" and you get a number that describes none of them particularly well.
The Land Under the Rambler
There is a second force pulling on that median, and it matters most for anyone looking at Potomac's older housing stock from the 1960s through the 1980s. In a meaningful share of these homes, the land underneath is worth more than the structure sitting on it. That changes what a listed price is actually buying.
Local design-build teams working in Potomac report that a full custom rebuild on an existing lot has historically run from roughly $350,000 to $3 million or more, with the final number driven by house size, site work, and whether the property sits on public sewer or on well and septic. Some pockets of Potomac sit outside the public sewer envelope entirely, which means septic capacity, tied to perc tests and approved bedroom count, becomes part of the underwriting before anyone talks about finishes. Well yield and water quality get tested up front for the same reason.
None of that is a defect in these homes. It is homework that has to happen before a purchase price makes sense. But it means two listings at the same asking price in Potomac can represent two entirely different transactions. One might be a move-in-ready home. The other might functionally be a lot purchase with a dated house on it, priced closer to what the land and rebuild potential are worth than what four walls and a roof are worth today. A median sale price cannot tell those two transactions apart. It just averages them.
What This Means If You're Comparing Potomac to Somewhere Else
If you are early in a search and using Potomac's median as a benchmark against another Montgomery County neighborhood, the honest move is to treat that number as a rough zip-code average, not a price tag. The real comparison has to happen at the neighborhood level, sometimes at the street level.
A buyer choosing between a Carderock townhouse and a similarly priced home in Avenel is not really choosing between two homes of equal size and finish. They are choosing between an HOA that includes golf and tennis access and one that does not, between attached living and a detached lot, between two very different monthly obligations once assessments are added to a mortgage payment. A buyer comparing a Mazza Woods listing to a Potomac Falls listing is choosing between minimal shared governance and a voluntary HOA on a larger minimum lot size, which affects everything from resale flexibility to how much lawn and tree care becomes part of ownership.
None of these differences show up in a headline median. They show up when you pull recent closed sales for that specific pocket of Potomac and compare them to the listing in front of you, which is a very different exercise than comparing that listing to a countywide or citywide average.
Questions Worth Asking Before You Compare Two Listings Both Called "Potomac"
- Is this property governed by a mandatory HOA, a voluntary one, or effectively none, and what does that assessment actually fund
- Is the home on public sewer, or does it rely on well and septic, and has the septic system been evaluated for the bedroom count you actually want
- What is the lot size doing to the price relative to the structure, and would a rebuild or major renovation make more financial sense than the current layout
- What did comparable homes in this specific neighborhood, not the Potomac-wide average, actually close for in the last few months
Those four questions will tell you more about a fair price than any median pulled from a portal, because they get at the parts of the transaction that a single number cannot capture: governance, land value, and what recently sold next door rather than what sold somewhere else with the same ZIP code.
Potomac rewards buyers and sellers who do that homework early, and it can be an unforgiving market for anyone who anchors to a headline figure and skips it. If you are trying to make sense of what a specific Potomac address is really worth, or you are preparing to list one and want the comparable sales pulled for your actual pocket of the neighborhood rather than the ZIP code as a whole, Betsy Taylor has spent years working these micro-markets street by street. Let's Connect and talk through what your number should actually be.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
