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Single Family ResidenceResidential
$1,090,920$303 / 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 96How 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 $360,000 on Nov 11, 1996

10917 AMMONS ST

WESTMINSTER, CO 80021
4
Beds
4
Baths
3,604 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.
0.34 ac
Lot SizeThe size of the land the home sits on, from county records.
1997
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$1.1M
$1M low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$360,000 · Nov 11, 1996

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,269 (2024)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$62,790 (2024)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$17,653
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$45,137
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$62,790
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$992,167

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
CountyJefferson
Lot (acres)The size of the land the home sits on, from county records.0.34
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Forced Air
FireplaceWhether the home has a fireplace, and what kind.Yes
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.Spa/Hot Tub (Only)
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck · 448 ft²Patio · 448 ft²Porch · 63 ft²

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.

H
Standley Lake High SchoolB
High · Grades 9–12 · 1.0 mi
E
Semper Elementary SchoolC
Elementary · Grades PK–5 · 1.6 mi
M
Mandalay Middle SchoolB+
Middle · Grades 6–8 · 1.7 mi

District: Jefferson County School District R-1

Neighborhood · ZIP 80021These 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.102
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 100.44

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.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.8%
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.35,343
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,814 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$103,703
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$122,519
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.16 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

10917 Ammons 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 most valuable homes in Broomfield 80021
  • Costs less per square foot than 90% of homes in Green Knolls
  • Among the largest homes in Broomfield 80021
  • Has a bigger lot than 94% of homes in Broomfield 80021
  • Newer than 95% of homes in Green Knolls

What homes are worth in Broomfield 80021

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

This home
$300K$986K

This home is worth more than almost all homes in Broomfield 80021.

How it measures up in Broomfield 80021

The dot is this home. The mark in the middle is the typical home in Broomfield 80021.

Estimated value$1,090,920
CheaperTypical $557,897Pricier

Pricier than almost all homes nearby

Price per ft²$303
CheaperTypical $374Pricier

Pricier than 13% of homes nearby

Living area3,604 ft²
SmallerTypical 1,456 ft²Bigger

Bigger than almost all homes nearby

Lot size0.34 ac
SmallerTypical 0.16 acBigger

Bigger than 94% of homes nearby

Year built1997
OlderTypical 1983Newer

Newer than 81% of homes nearby

How 10917 Ammons St ranks against every home in each area.
MeasureThis homeGreen KnollsBroomfield 80021Jefferson County
Estimated valuepricier than$1,090,92098% of homesalmost all homes90% of homes
Price per ft²pricier than$30310% of homes13% of homes15% of homes
Living areabigger than3,604 ft²96% of homesalmost all homes98% of homes
Lot sizebigger than0.34 ac65% of homes94% of homes80% of homes
Year builtnewer than199795% of homes81% of homes80% of homes

About 10917 Ammons St

How much is 10917 Ammons St, Westminster, CO worth?

The TopHap Estimate for 10917 Ammons St, Westminster, CO is $1,090,920 as of Aug 30, 2026. The likely range is $1,045,526 to $1,136,314. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10917 Ammons St, Westminster, CO last sell?

10917 Ammons St, Westminster, CO last sold on Nov 11, 1996 for $360,000, according to the county's recorded deed.

How big is 10917 Ammons St, Westminster, CO?

10917 Ammons St, Westminster, CO has 4 bedrooms, 4 bathrooms, 3,604 square feet of living space and a 0.34-acre lot.

When was 10917 Ammons St, Westminster, CO built?

10917 Ammons St, Westminster, CO was built in 1997, making it 29 years old. It is a split level home. The building has 2 stories.

What schools serve 10917 Ammons St, Westminster, CO?

10917 Ammons St, Westminster, CO is assigned to Standley Lake High School (high), rated B; Semper Elementary School (elementary), rated C; Mandalay Middle School (middle), rated B+. All sit in Jefferson County School District R-1. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10917 Ammons St, Westminster, CO compare to other homes in Broomfield 80021?

Among the 9,709 homes in Broomfield 80021, it is worth more than almost all of them ($1,090,920 against a typical $557,897), its price per square foot is higher than 13% of them ($303 against a typical $374), it is bigger than almost all of them (3,604 ft² against a typical 1,456 ft²), its lot is bigger than 94% of them (0.34 ac against a typical 0.16 ac) and it is newer than 81% of them (1997 against a typical 1983). Measured against all of Jefferson County, it is worth more than 90% 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 10917 Ammons St, Westminster, CO?

The 2024 property tax bill for 10917 Ammons St, Westminster, CO was $4,269. The county assessed it at $62,790.

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