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CondominiumResidential
$385,000$621 / 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 89How 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
Last sold for $325,000 on Dec 22, 2021

830 20TH ST

BOULDER, CO 80302
Building report
1
Beds
1
Baths
620 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.
24 ft²
Lot SizeThe size of the land the home sits on, from county records.
1963
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$385K
$342K low$428K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$325,000 · Dec 22, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,179 (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.$24,861 (2026)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$24,861
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$22,850
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$365,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyBOULDER
Lot (acres)The size of the land the home sits on, from county records.0.00
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
RoofThe main material covering the roof, such as asphalt shingle or tile.Builtup (layered Asphalt)
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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.

H
Boulder High SchoolA+
High · Grades 9–12 · 0.8 mi
E
Flatirons Elementary SchoolB-
Elementary · Grades KG–5 · 1.0 mi
M
Manhattan School of Arts and AcademicsC+
Middle · Grades 6–8 · 2.1 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

830 20th 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 94% of homes in University Place
  • Costs more per square foot than 86% of homes in Boulder County
  • Smaller than 97% of homes in Boulder County
  • Among the smallest lots in University Place
  • Older than 84% of 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
$294K$4.3M

This home is worth more than 7% 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$385,000
CheaperTypical $1,116,959Pricier

Pricier than 7% of homes nearby

Price per ft²$621
CheaperTypical $638Pricier

Pricier than 47% of homes nearby

Living area620 ft²
SmallerTypical 2,014 ft²Bigger

Bigger than 6% of homes nearby

Lot size24 ft²
SmallerTypical 0.24 acBigger

Smaller than almost all homes nearby

Year built1963
OlderTypical 1970Newer

Newer than 41% of homes nearby

How 830 20th St ranks against every home in each area.
MeasureThis homeUniversity PlaceBoulder 80302Boulder County
Estimated valuepricier than$385,0006% of homes7% of homes9% of homes
Price per ft²pricier than$62132% of homes47% of homes86% of homes
Living areabigger than620 ft²5% of homes6% of homes3% of homes
Lot sizebigger than24 ft²almost no homesalmost no homesalmost no homes
Year builtnewer than196371% of homes41% of homes16% of homes

About 830 20th St

How much is 830 20th St, Boulder, CO worth?

The TopHap Estimate for 830 20th St, Boulder, CO is $385,000 as of Aug 30, 2026. The likely range is $342,065 to $427,935. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 830 20th St, Boulder, CO last sell?

830 20th St, Boulder, CO last sold on Dec 22, 2021 for $325,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 830 20th St, Boulder, CO?

830 20th St, Boulder, CO has 1 bedrooms, 1 bathrooms, 620 square feet of living space and a 0.00-acre lot.

When was 830 20th St, Boulder, CO built?

830 20th St, Boulder, CO was built in 1963, making it 63 years old. It is a condo/apartment home. The building has 1 story.

What schools serve 830 20th St, Boulder, CO?

830 20th St, Boulder, CO is assigned to Boulder High School (high), rated A+; Flatirons Elementary School (elementary), rated B-; Manhattan School of Arts and Academics (middle), rated C+. All sit in Boulder Valley School District Re-2. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 830 20th St, Boulder, CO compare to other homes in Boulder 80302?

Among the 7,990 homes in Boulder 80302, it is worth more than 7% of them ($385,000 against a typical $1,116,959), its price per square foot is higher than 47% of them ($621 against a typical $638), it is bigger than 6% of them (620 ft² against a typical 2,014 ft²), its lot is bigger than almost none of them (24 ft² against a typical 0.24 ac) and it is newer than 41% of them (1963 against a typical 1970). Measured against all of Boulder County, it is worth more than 9% 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 830 20th St, Boulder, CO?

The 2025 property tax bill for 830 20th St, Boulder, CO was $2,179. The county assessed it at $24,861.

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