Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$2,631,648$954 / 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 Sep 24, 2026
Last sold for $2,609,700 on Dec 15, 2025

721 9TH ST

BOULDER, CO 80302
5
Beds
4.8
Baths
2,759 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.
1911
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$2.6M
$2.3M low$3M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$2,609,700 · Dec 15, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$13,984 (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.$159,569 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$119,082
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$40,487
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$146,663
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$2,346,600

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
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.2000
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.Masonry/Concrete Masonry Units (Cmus)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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.Porch · 288 ft²

Transaction History(7)

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 SchoolB-
Elementary · Grades KG–5 · 0.5 mi
H
Boulder High SchoolA+
High · Grades 9–12 · 1.0 mi
M
Manhattan School of Arts and AcademicsC+
Middle · Grades 6–8 · 2.9 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

721 9th 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 more than 97% of homes in Boulder County
  • Costs more per square foot than 98% of homes in Boulder County
  • Bigger than 76% of homes in Boulder County
  • Has a bigger lot than 75% of homes in Boulder County
  • Older than 97% 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
$302K$4.8M

This home is worth more than 90% 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$2,631,648
CheaperTypical $1,132,945Pricier

Pricier than 90% of homes nearby

Price per ft²$954
CheaperTypical $632Pricier

Pricier than 87% of homes nearby

Living area2,759 ft²
SmallerTypical 2,020 ft²Bigger

Bigger than 71% of homes nearby

Lot size0.29 ac
SmallerTypical 0.24 acBigger

Bigger than 55% of homes nearby

Year built1911
OlderTypical 1970Newer

Newer than 13% of homes nearby

How 721 9th St ranks against every home in each area.
MeasureThis homeGrantBoulder 80302Boulder County
Estimated valuepricier than$2,631,64865% of homes90% of homes97% of homes
Price per ft²pricier than$95477% of homes87% of homes98% of homes
Living areabigger than2,759 ft²46% of homes71% of homes76% of homes
Lot sizebigger than0.29 ac72% of homes55% of homes75% of homes
Year builtnewer than19119% of homes13% of homes3% of homes

About 721 9th St

How much is 721 9th St, Boulder, CO worth?

The TopHap Estimate for 721 9th St, Boulder, CO is $2,631,648 as of Sep 24, 2026. The likely range is $2,261,708 to $3,001,588. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 721 9th St, Boulder, CO last sell?

721 9th St, Boulder, CO last sold on Dec 15, 2025 for $2,609,700, according to the county's recorded deed. TopHap holds 6 recorded sales for this parcel.

How big is 721 9th St, Boulder, CO?

721 9th St, Boulder, CO has 5 bedrooms, 4.8 bathrooms, 2,759 square feet of living space and a 0.29-acre lot.

When was 721 9th St, Boulder, CO built?

721 9th St, Boulder, CO was built in 1911, making it 115 years old. The building has 2 stories.

What schools serve 721 9th St, Boulder, CO?

721 9th St, Boulder, CO is assigned to Flatirons Elementary School (elementary), rated B-; Boulder High School (high), rated A+; 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 721 9th St, Boulder, CO compare to other homes in Boulder 80302?

Among the 7,990 homes in Boulder 80302, it is worth more than 90% of them ($2,631,648 against a typical $1,132,945), its price per square foot is higher than 87% of them ($954 against a typical $632), it is bigger than 71% of them (2,759 ft² against a typical 2,020 ft²), its lot is bigger than 55% of them (0.29 ac against a typical 0.24 ac) and it is newer than 13% of them (1911 against a typical 1970). Measured against all of Boulder County, it is worth more than 97% 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 721 9th St, Boulder, CO?

The 2025 property tax bill for 721 9th St, Boulder, CO was $13,984. The county assessed it at $159,569.

More homes on 9th St

Closest homes

More homes in Boulder 80302

Assigned schools

Explore the area

See this home in context

Open 721 9th 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