521 parcels on R-200 lots with a median of 15,494 square feet, 31 of the 32 plats recorded by one company between 1965 and 1991.
River Falls is not built on the Potomac two-acre pattern at all, and treating it like the RE-2 subdivisions nearby will mislead you on price, on tax basis and on what an addition involves. It is zoned R-200, 517 of its 521 parcels are recorded in square feet rather than acres, and its median lot is 15,494 square feet — roughly a third of an acre. It is also close to a single-company subdivision: 31 of its 32 plats were recorded by Clarence W. Gosnell, Incorporated. Note that River Falls in Maryland is a different place from the Potomac Falls area in Loudoun County, Virginia.
Clarence W. Gosnell, Incorporated recorded 31 of the subdivision's 32 plats between 1965 and 1991, and houses were built from 1968 to 2006 with a median year built of 1980. A quarter-century of continuous work by one builder produces something you can see walking the streets: consistent framing practice, consistent lot grading, and elevations that evolve gradually rather than jumping between eras. It also means the sections are datable — an early Gosnell block and a late one are different products, and the difference is worth pricing rather than averaging away.
R-200 sets a minimum lot area of 20,000 square feet, and River Falls' median parcel of 15,494 square feet sits below that, which is common where lots were platted under earlier rules. What that means for a specific address — whether an addition, an accessory structure or a rebuild fits — is a question for Montgomery Planning, not something to infer from the zone letter. As of August 2026, R-200 caps lot coverage at 25 percent under the standard method, and the standard-method height cap runs from 35 to 50 feet depending on lot size, measured lower to mean roof height than to the peak. The subdivision holds 448 detached and 51 attached homes, plus 12 open-space and 3 park parcels.
Governance here is layered, and buyers routinely assume one body when three are registered: the River Falls Homeowners Association, River Falls Condominium Inc., and the Civic Association of River Falls, which together reach roughly 98 percent of the subdivision. Which ones apply depends on the address and on whether the home is detached, attached or a condominium unit. Ask the listing agent to identify each body by name, order the resale or condominium documents for the correct one, and read the assessment and any architectural review requirements before waiving a document review contingency.
The streets carry an equestrian naming theme, a small local signature that separates River Falls from the Roman, painter and colonial themes used elsewhere in Potomac. On schools, River Falls is served by Carderock Springs Elementary School, Thomas W. Pyle Middle School and Walt Whitman High School — the only subdivision covered on our Potomac pages that sits wholly in that cluster rather than the Churchill one. Because the assignment differs from most of Potomac, verify it for the specific address with Montgomery County Public Schools rather than assuming the pattern that holds a mile away. As of August 2026.
River Falls sits within Potomac — that guide covers the zoning, permitting and site constraints that apply across the wider area.
Artur can confirm what applies to a specific address here — lot, zoning, association documents and school assignment — before you write an offer.
