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Single Family ResidenceResidential
$403,327$440 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 86How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026

855 RIVERSIDE DR

LYONS, CO 80540
2
Beds
1
Baths
916 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
1.63 ac
Lot SizeThe size of the land the home sits on, from county records.
1906
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$403K
$348K low$458K high
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$403,327
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$322,662

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,320 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$25,711 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$5,896
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$19,815
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$23,632
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$378,100

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Ranch
CountyBOULDER
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1928
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Porch · 54 ft²

Transaction History(1)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
Lyons Middle / Senior High SchoolA-
Middle · Grades 6–12 · 9.7 mi
E
Lyons Elementary SchoolA-
Elementary · Grades PK–5 · 9.7 mi

District: St. Vrain Valley School District Re 1j

Neighborhood · ZIP 80540These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.157
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.54

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.72%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.3,726
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.23 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$126,918
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$148,576
Average tempThe average temperature here across a full year.41°F
Annual precipHow much rain and melted snow falls here in a typical year.22 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.69%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.Yes

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

855 Riverside Dr measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Worth less than 90% of homes in Lyons 80540
  • Smaller than 91% of homes in Boulder County
  • Has a bigger lot than 92% of homes in Boulder County
  • Among the oldest homes in Allenspark Vicinity

What homes are worth in Lyons 80540

Each bar is how many homes fall in that price range. The marker is this home.

This home
$242K$1.7M

This home is worth more than 10% of homes in Lyons 80540.

How it measures up in Lyons 80540

The dot is this home. The mark in the middle is the typical home in Lyons 80540.

Estimated value$403,327
CheaperTypical $777,415Pricier

Pricier than 10% of homes nearby

Price per ft²$440
CheaperTypical $451Pricier

Pricier than 47% of homes nearby

Living area916 ft²
SmallerTypical 1,702 ft²Bigger

Bigger than 15% of homes nearby

Lot size1.63 ac
SmallerTypical 0.73 acBigger

Bigger than 68% of homes nearby

Year built1906
OlderTypical 1979Newer

Newer than 4% of homes nearby

How 855 Riverside Dr ranks against every home in each area.
MeasureThis homeAllenspark VicinityLyons 80540Boulder County
Estimated valuepricier than$403,32740% of homes10% of homes11% of homes
Price per ft²pricier than$44052% of homes47% of homes63% of homes
Living areabigger than916 ft²39% of homes15% of homes9% of homes
Lot sizebigger than1.63 ac56% of homes68% of homes92% of homes
Year builtnewer than1906almost no homes4% of homes2% of homes

About 855 Riverside Dr

How much is 855 Riverside Dr, Lyons, CO worth?

The TopHap Estimate for 855 Riverside Dr, Lyons, CO is $403,327 as of Jul 14, 2026. The likely range is $348,395 to $458,259. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 855 Riverside Dr, Lyons, CO last sell?

855 Riverside Dr, Lyons, CO last sold on May 28, 1992, according to the county's recorded deed.

How big is 855 Riverside Dr, Lyons, CO?

855 Riverside Dr, Lyons, CO has 2 bedrooms, 1 bathrooms and 916 square feet of living space.

When was 855 Riverside Dr, Lyons, CO built?

855 Riverside Dr, Lyons, CO was built in 1906, making it 120 years old. It is a ranch home. The building has 1 story.

What schools serve 855 Riverside Dr, Lyons, CO?

855 Riverside Dr, Lyons, CO is assigned to Lyons Middle / Senior High School (middle), rated A-; Lyons Elementary School (elementary), rated A-. All sit in St. Vrain Valley School District Re 1j. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 855 Riverside Dr, Lyons, CO compare to other homes in Lyons 80540?

Among the 2,476 homes in Lyons 80540, it is worth more than 10% of them ($403,327 against a typical $777,415), its price per square foot is higher than 47% of them ($440 against a typical $451), it is bigger than 15% of them (916 ft² against a typical 1,702 ft²), its lot is bigger than 68% of them (1.63 ac against a typical 0.73 ac) and it is newer than 4% of them (1906 against a typical 1979). Measured against all of Boulder County, it is worth more than 11% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 855 Riverside Dr, Lyons, CO?

The 2025 property tax bill for 855 Riverside Dr, Lyons, CO was $2,320. The county assessed it at $25,711.

Closest homes

More homes in Lyons 80540

Assigned schools

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