Marshall and the South Boulder Road corridor: home prices, who is buying, and how the county's old farmsteads really sell

Updated September 2026 · Based on 11 recorded sales Jan 2021 – Sep 2026, 7 verified asking prices and 12 classified buyers

Photo: Braden Collum on Unsplash (Unsplash License)

Between Boulder's southeast city limit and Louisville, along South Boulder Road, Cherryvale Road and Marshall Road, a thin band of unincorporated county holds the old coal hamlet of Marshall and a few dozen farmsteads and acreage houses hemmed in by city open space. It is a very small sub-market — 11 sales since 2021, seven with a verified asking price — of mostly pre-1960 houses on 1.8-acre lots with a $1.12M median, sold at the highest cash share in south Boulder County and, since the Marshall Fire, with wildfire on every buyer's checklist.

The neighborhood

Assessor area 154 follows South Boulder Road east from the Boulder city line past Cherryvale Road to the Louisville boundary, and south along Highway 93 to Marshall Road, where the hamlet of Marshall sits below Marshall Mesa. Joseph Marshall opened his coal company here in the 1860s, the settlement went through the names Langford and Gorham, and the mines that undercut the mesa closed by the 1940s — though the coal seams have burned underground ever since, flaring up in 2003 and 2005 and examined again after 2021. The Marshall Fire began on December 30, 2021 near Highway 93 and Marshall Road and, driven by gusts up to 115 mph, burned 6,026 acres and 1,084 structures east and south of here in Superior, Louisville and unincorporated county — the most destructive fire in Colorado's history. Marshall itself and the corridor's properties are where it started.

The housing stock is older than almost anywhere else in the county: the typical home sold since 2021 was built in 1958, 36% of sales were built before 1950, and the lots are working-farm sized at a median of 1.8 acres. They are farmhouses and 1950s–70s ranches with barns, sheds and horse pasture, a few of them expanded or rebuilt into contemporary houses (18% built since 2000), and the occasional large estate. The 2021–26 sales run from a $435K property to a $9.0M one, which says everything about how varied — and how few — the transactions are.

This is unincorporated Boulder County: the sheriff, county road maintenance, wells and septic on most parcels, county agricultural zoning that limits subdivision, and the county's wildland-urban-interface rules on new building. City of Boulder open space surrounds the corridor — the Marshall Mesa trailhead at Highway 93 and Marshall Road connects seven trails across Marshall Valley, Coal Seam, Community Ditch and the Greenbelt Plateau, with the Flatirons, hawks, coyotes and mule deer for company — and South Boulder Creek and the Dry Creek ditches run through it, so flood mapping matters. The Flatirons Golf Course and East Boulder Community Center are on the city side of the line. Downtown Boulder is ten minutes up South Boulder Road or Broadway; schools are Boulder Valley's, generally Eisenhower or Creekside Elementary, Manhattan Middle and Fairview High by assignment. One to four homes sell in a typical year.

Where South Boulder Rd corridor – Marshall (unincorp.) is

Map centered on the 11 geocoded sales in assessor neighborhood 154; the neighborhood boundary is the Boulder County Assessor's appraisal area, not a formal city boundary.

Homes and prices in South Boulder Rd corridor – Marshall (unincorp.)

All 11 sales since 2021 were detached houses, and because the sample is so small the figures use the full 2021–26 window. The $1.12M median is 18% above Boulder's city-wide median, and at $666 per square foot the corridor is 21% above Boulder per foot — for 1950s farmhouses on acreage, which tells you the land, not the building, carries the value. The middle half of sales fell between $923K and $1.27M; the $435K low and the $9.0M high are single transactions. The 2022 median of $518K rests on two sales and the 2023 and 2025 figures on one each, so the year-by-year chart here is a list of houses rather than a trend.

The typical home sold in 2021–26 has 3 bedrooms, 3 baths and 2,549 sq ft, on a 78,665 sq ft lot; the median build year is 1958, with 36.4% of homes built before 1950 and 18.2% since 2000. Prices run from $435K to $9.00M.

Median sale price by year

Single-family houses   Condos & townhomes   (labels: sales per year, houses / condos)

Medians move with the mix of what sold each year (a run of large rebuilds lifts the house number); a bar is omitted when fewer than three of that type sold. Read the trend, not single-year steps.

What it takes to buy here

At the 2021–26 median of $1,119,000, a conventional purchase with 20% down at a 6.76% 30-year rate costs about $6,651 a month including taxes and insurance, which lenders would typically want to see backed by a household income near $285,062 and roughly $246,180 in cash at closing. 59.4% of all Boulder sales in 2025–26 closed below this neighborhood's median.

Who is buying in South Boulder Rd corridor – Marshall (unincorp.)

Twelve classified buyers on nine transactions cannot support firm percentages. What the pattern shows is health care as the largest sector at 25%, twice its Boulder share, driven by medical-device employers (17% here against 1% city-wide); tech at 17%, in line with the city; and construction and trades employers at 17% against 2% — people who work with land and equipment buying land and outbuildings. Venture capital and government buyers each appear at 8%, well above their 1% and 3% city shares, though each is a single buyer. University and research buyers are 8% against 12%, and there are no recorded finance, consulting, legal, nonprofit or real-estate buyers. Cash purchases are 27%, above Boulder's 21% and the highest share among the sub-markets south of the city.

Share of 12 classified buyers on 8 transactions with an identified employer; industry attribution only, no individual buyer identified.

How South Boulder Rd corridor – Marshall (unincorp.) prices — and how to play it

D   Ownify competitiveness index 30 / 100 — a D, which in Boulder means negotiable: homes with these characteristics are expected to close below asking, and at or a little below market value, more often than most of the city. On seven verified asking prices the record leans the same way — six of the seven closed under asking, the median sale was 97.0% of ask and 99.1% of value — but a grade built on 11 sales is a direction, not a verdict.

If you are selling

The corridor convention is to list about 2% above market value and accept roughly 3% under asking after seven weeks, which lands the median sale about 1% under value. Ownify's Boulder model puts the probability of selling in the listing at 90% for an ask at the convention (102.1% of value), 91% at value, 88% at 108% and 87% at 112%. The odds barely change with the ask; the calendar does. Boulder listings at or under 105% of value take a median 38 days, 42 at 105–110% and 49–55 above 110%, against a 47-day median here with 29% of listings passing 60 days. Only one of the seven verified sales closed over asking, and because roughly 93% of the asking price passes through to the sale price in Boulder, an over-ask on an acreage property mostly adds weeks and is then negotiated back. Price at or within two percent of value, and lead with the land: well yield, septic inspection, water and ditch rights, outbuilding permits, the flood-zone determination, wildfire mitigation and a bindable insurance quote — since the Marshall Fire, insurability is the first question a buyer's lender asks about any address on this corridor.

With seven verified asking prices behind these percentages, the convention is a starting point; the comparables for a specific property matter more.

If you are buying

Buyers have leverage. Six of seven verified sales closed under asking, the median sale is 3% below ask, and 29% of listings are still available after 60 days. A bid 3–5% under asking on a property that has been listed six weeks is within the historical pattern here. Cash is a real competitor — 27% of purchases — so a financed buyer should arrive with the well test, septic inspection, flood determination and, above all, a wildfire-insurance quote already in hand, because those are the contingencies a cash offer waives. The typical $1.12M house is above the Ownify Home Fund's $1M ceiling, so it is financed through an Ownify mortgage rather than the 2%-down program; but about 45% of sales since 2021 closed under $1M — usually a smaller older house on a larger lot — and those qualify for the 2%-down Home Fund. There are no condos or townhomes in the sub-market.

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