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Single Family ResidenceResidential
$479,975$243 / 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 97How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $380,000 on Jun 10, 2019

4331 ONYX PL

JOHNSTOWN, CO 80534
3
Beds
3
Baths
1,978 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.
0.15 ac
Lot SizeThe size of the land the home sits on, from county records.
2006
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$480K
$464K low$496K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$380,000 · Jun 10, 2019

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,165 (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.$30,030 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$6,920
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$23,110
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$30,660
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$490,647

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.7 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
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.Split Level
CountyWELD
Lot (acres)The size of the land the home sits on, from county records.0.15
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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.Patio · 120 ft²Porch · 280 ft²

Transaction History(5)

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

Foreclosure Filings(2)

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

E
Elwell Elementary SchoolB-
Elementary · Grades PK–5 · 2.6 mi
H
Roosevelt High SchoolB
High · Grades 9–12 · 2.9 mi
M
Milliken Middle SchoolB-
Middle · Grades 6–8 · 5.9 mi

District: Johnstown-Milliken School District Re-5j

Neighborhood · ZIP 80534These 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.37
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.96
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.43

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.19,604
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.405 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$122,385
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$146,522
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.14 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.69%

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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

4331 Onyx Pl 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 66% of homes in Johnstown 80534
  • Has a smaller lot than 69% of homes in Weld County
  • Newer than 65% of homes in Weld County

What homes are worth in Johnstown 80534

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

This home
$327K$915K

This home is worth more than 34% of homes in Johnstown 80534.

How it measures up in Johnstown 80534

The dot is this home. The mark in the middle is the typical home in Johnstown 80534.

Estimated value$479,975
CheaperTypical $513,392Pricier

Pricier than 34% of homes nearby

Price per ft²$243
CheaperTypical $246Pricier

Pricier than 47% of homes nearby

Living area1,978 ft²
SmallerTypical 2,090 ft²Bigger

Bigger than 45% of homes nearby

Lot size0.15 ac
SmallerTypical 0.16 acBigger

Bigger than 33% of homes nearby

Year built2006
OlderTypical 2010Newer

Newer than 44% of homes nearby

How 4331 Onyx Pl ranks against every home in each area.
MeasureThis homeJohnstown 80534Weld County
Estimated valuepricier than$479,97534% of homes50% of homes
Price per ft²pricier than$24347% of homes45% of homes
Living areabigger than1,978 ft²45% of homes54% of homes
Lot sizebigger than0.15 ac33% of homes31% of homes
Year builtnewer than200644% of homes65% of homes

About 4331 Onyx Pl

How much is 4331 Onyx Pl, Johnstown, CO worth?

The TopHap Estimate for 4331 Onyx Pl, Johnstown, CO is $479,975 as of Sep 24, 2026. The likely range is $463,989 to $495,961. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4331 Onyx Pl, Johnstown, CO last sell?

4331 Onyx Pl, Johnstown, CO last sold on Jun 10, 2019 for $380,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 4331 Onyx Pl, Johnstown, CO?

4331 Onyx Pl, Johnstown, CO has 3 bedrooms, 3 bathrooms, 1,978 square feet of living space and a 0.15-acre lot.

When was 4331 Onyx Pl, Johnstown, CO built?

4331 Onyx Pl, Johnstown, CO was built in 2006, making it 20 years old. It is a split level home. The building has 1 story.

What schools serve 4331 Onyx Pl, Johnstown, CO?

4331 Onyx Pl, Johnstown, CO is assigned to Elwell Elementary School (elementary), rated B-; Roosevelt High School (high), rated B; Milliken Middle School (middle), rated B-. All sit in Johnstown-Milliken School District Re-5j. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4331 Onyx Pl, Johnstown, CO compare to other homes in Johnstown 80534?

Among the 7,922 homes in Johnstown 80534, it is worth more than 34% of them ($479,975 against a typical $513,392), its price per square foot is higher than 47% of them ($243 against a typical $246), it is bigger than 45% of them (1,978 ft² against a typical 2,090 ft²), its lot is bigger than 33% of them (0.15 ac against a typical 0.16 ac) and it is newer than 44% of them (2006 against a typical 2010). Measured against all of Weld County, it is worth more than 50% 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 4331 Onyx Pl, Johnstown, CO?

The 2025 property tax bill for 4331 Onyx Pl, Johnstown, CO was $3,165. The county assessed it at $30,030.

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