Skip to content
Skip to content
TopHapOpen in map
Multi-Family Dwellings (Generic, Any Combination)Residential
Last sold for $5,500,000 on Aug 30, 2013

1005 12TH ST

BOULDER, CO 80302
32
Beds
25
Baths
19,380 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
1965
Year BuiltThe year the home was originally built, according to county records.
50
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
17
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$5,500,000 · Aug 30, 2013

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$57,179 (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.$646,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$159,827
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$486,173
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$805,225
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$9,500,000

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Multi-Family Dwellings (Generic, Any Combination)
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.1997
Lot (acres)The size of the land the home sits on, from county records.0.28
ConstructionThe main material the home's frame and walls are built from.Masonry/Concrete Masonry Units (Cmus)
HeatingThe type of heating system in the home.Hot Water
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

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.

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

E
Flatirons Elementary SchoolA
Elementary · Grades KG–5 · 0.4 mi
H
Boulder High SchoolC
High · Grades 9–12 · 0.6 mi
M
Manhattan School of Arts and AcademicsA-
Middle · Grades 6–8 · 2.7 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%

Owner Tools

Do you own this home?
Claim this home

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

1005 12th 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.

  • Among the largest homes in University Place
  • Has a bigger lot than 93% of homes in University Place
  • Older than 82% of homes in Boulder County

How it measures up in Boulder 80302

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

Living area19,380 ft²
SmallerTypical 2,028 ft²Bigger

Bigger than almost all homes nearby

Lot size0.28 ac
SmallerTypical 0.24 acBigger

Bigger than 54% of homes nearby

Year built1965
OlderTypical 1970Newer

Newer than 43% of homes nearby

How 1005 12th St ranks against every home in each area.
MeasureThis homeUniversity PlaceBoulder 80302Boulder County
Living areabigger than19,380 ft²almost all homesalmost all homesalmost all homes
Lot sizebigger than0.28 ac93% of homes54% of homes74% of homes
Year builtnewer than196571% of homes43% of homes18% of homes

About 1005 12th St

When did 1005 12th St, Boulder, CO last sell?

1005 12th St, Boulder, CO last sold on Aug 30, 2013 for $5,500,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 1005 12th St, Boulder, CO?

1005 12th St, Boulder, CO has 32 bedrooms, 25 bathrooms, 19,380 square feet of living space and a 0.28-acre lot.

When was 1005 12th St, Boulder, CO built?

1005 12th St, Boulder, CO was built in 1965, making it 61 years old.

What schools serve 1005 12th St, Boulder, CO?

1005 12th St, Boulder, CO is assigned to Flatirons Elementary School (elementary), rated A; Boulder High School (high), rated C; Manhattan School of Arts and Academics (middle), 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 1005 12th St, Boulder, CO compare to other homes in Boulder 80302?

Among the 7,990 homes in Boulder 80302, it is bigger than almost all of them (19,380 ft² against a typical 2,028 ft²), its lot is bigger than 54% of them (0.28 ac against a typical 0.24 ac) and it is newer than 43% of them (1965 against a typical 1970). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 1005 12th St, Boulder, CO?

The 2025 property tax bill for 1005 12th St, Boulder, CO was $57,179. The county assessed it at $646,000.

More homes on 12th St

Closest homes

More homes in Boulder 80302

Assigned schools

Explore the area

See this home in context

Open 1005 12th St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map