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Single Family ResidenceResidential
$455,119$610 / 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 75How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

421 GOLD RUN ST

BOULDER, CO 80302
2
Beds
1
Baths
746 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.
0.29 ac
Lot SizeThe size of the land the home sits on, from county records.
1895
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$455K
$341K low$569K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$1,109 (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.$19,530 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,115
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$17,415
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$17,950
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$287,200

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
Lot (acres)The size of the land the home sits on, from county records.0.29
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

E
Gold Hill Elementary School
Elementary · Grades KG–5 · 0.2 mi
M
Casey Middle SchoolC
Middle · Grades 6–8 · 7.4 mi
H
Boulder High SchoolA+
High · Grades 9–12 · 8.0 mi

District: Boulder Valley School District Re-2

Neighborhood · ZIP 80302These 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.134
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 100.46

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.37%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.27%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.1%
PopulationHow many people live in this area.31,245
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.324 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$82,366
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$127,191
Average tempThe average temperature here across a full year.45°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%

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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

421 Gold Run St 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 89% of homes in Boulder 80302
  • Costs more per square foot than 86% of homes in Boulder County
  • Smaller than 96% of homes in Boulder County
  • Has a bigger lot than 75% of homes in Boulder County
  • Among the oldest homes in Boulder County

What homes are worth in Boulder 80302

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

This home
$295K$4.5M

This home is worth more than 11% of homes in Boulder 80302.

How it measures up in Boulder 80302

The dot is this home. The mark in the middle is the typical home in Boulder 80302.

Estimated value$455,119
CheaperTypical $1,119,273Pricier

Pricier than 11% of homes nearby

Price per ft²$610
CheaperTypical $637Pricier

Pricier than 46% of homes nearby

Living area746 ft²
SmallerTypical 2,012 ft²Bigger

Bigger than 10% of homes nearby

Lot size0.29 ac
SmallerTypical 0.24 acBigger

Bigger than 55% of homes nearby

Year built1895
OlderTypical 1971Newer

Newer than 2% of homes nearby

How 421 Gold Run St ranks against every home in each area.
MeasureThis homeBoulder 80302Boulder County
Estimated valuepricier than$455,11911% of homes18% of homes
Price per ft²pricier than$61046% of homes86% of homes
Living areabigger than746 ft²10% of homes4% of homes
Lot sizebigger than0.29 ac55% of homes75% of homes
Year builtnewer than18952% of homesalmost no homes

About 421 Gold Run St

How much is 421 Gold Run St, Boulder, CO worth?

The TopHap Estimate for 421 Gold Run St, Boulder, CO is $455,119 as of Aug 30, 2026. The likely range is $341,442 to $568,796. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 421 Gold Run St, Boulder, CO last sell?

421 Gold Run St, Boulder, CO last sold on Nov 16, 1990, according to the county's recorded deed.

How big is 421 Gold Run St, Boulder, CO?

421 Gold Run St, Boulder, CO has 2 bedrooms, 1 bathrooms, 746 square feet of living space and a 0.29-acre lot.

When was 421 Gold Run St, Boulder, CO built?

421 Gold Run St, Boulder, CO was built in 1895, making it 131 years old. It is a ranch home. The building has 1 story.

What schools serve 421 Gold Run St, Boulder, CO?

421 Gold Run St, Boulder, CO is assigned to Gold Hill Elementary School (elementary); Casey Middle School (middle), rated C; Boulder High School (high), rated A+. All sit in Boulder Valley School District Re-2. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 421 Gold Run St, Boulder, CO compare to other homes in Boulder 80302?

Among the 7,990 homes in Boulder 80302, it is worth more than 11% of them ($455,119 against a typical $1,119,273), its price per square foot is higher than 46% of them ($610 against a typical $637), it is bigger than 10% of them (746 ft² against a typical 2,012 ft²), its lot is bigger than 55% of them (0.29 ac against a typical 0.24 ac) and it is newer than 2% of them (1895 against a typical 1971). Measured against all of Boulder County, it is worth more than 18% 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 421 Gold Run St, Boulder, CO?

The 2025 property tax bill for 421 Gold Run St, Boulder, CO was $1,109. The county assessed it at $19,530.

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