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TownhouseResidential
$436,863$294 / 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 93How 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 $442,000 on Jan 7, 2026

12237 KARLS LN

NORTHGLENN, CO 80241
3
Beds
2.5
Baths
1,484 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.
2,000 ft²
Lot SizeThe size of the land the home sits on, from county records.
2022
Year BuiltThe year the home was originally built, according to county records.
2
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.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$437K
$407K low$467K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$442,000 · Jan 7, 2026

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,767 (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.$34,410 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$4,420
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$29,990
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$31,620
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$506,000

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.41
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
46
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
75
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
18
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
66
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
CountyADAMS
Lot (acres)The size of the land the home sits on, from county records.0.05
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Central
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 · 140 ft²

Transaction History(3)

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.

M
Century Middle SchoolC-
Middle · Grades 6–8 · 1.0 mi
E
Hunters Glen Elementary SchoolC
Elementary · Grades PK–5 · 1.3 mi
H
Mountain Range High SchoolB
High · Grades 9–12 · 1.5 mi

District: Northglenn-Thornton School District 12

Neighborhood · ZIP 80241These 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.62
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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.28%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.9%
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.33,822
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,945 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$106,072
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$123,533
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.14 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

12237 Karls Ln 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 80% of homes in Thornton 80241
  • Smaller than 66% of homes in Thornton 80241
  • Has a smaller lot than 96% of homes in Adams County
  • Among the newest homes in Thornton 80241

What homes are worth in Thornton 80241

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

This home
$329K$739K

This home is worth more than 20% of homes in Thornton 80241.

How it measures up in Thornton 80241

The dot is this home. The mark in the middle is the typical home in Thornton 80241.

Estimated value$436,863
CheaperTypical $515,339Pricier

Pricier than 20% of homes nearby

Price per ft²$294
CheaperTypical $297Pricier

Pricier than 49% of homes nearby

Living area1,484 ft²
SmallerTypical 1,695 ft²Bigger

Bigger than 34% of homes nearby

Lot size2,000 ft²
SmallerTypical 0.15 acBigger

Bigger than 6% of homes nearby

Year built2022
OlderTypical 1996Newer

Newer than almost all homes nearby

How 12237 Karls Ln ranks against every home in each area.
MeasureThis homeThornton 80241Adams County
Estimated valuepricier than$436,86320% of homes37% of homes
Price per ft²pricier than$29449% of homes52% of homes
Living areabigger than1,484 ft²34% of homes44% of homes
Lot sizebigger than2,000 ft²6% of homes4% of homes
Year builtnewer than2022almost all homes96% of homes

About 12237 Karls Ln

How much is 12237 Karls Ln, Northglenn, CO worth?

The TopHap Estimate for 12237 Karls Ln, Northglenn, CO is $436,863 as of Sep 24, 2026. The likely range is $407,002 to $466,724. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 12237 Karls Ln, Northglenn, CO last sell?

12237 Karls Ln, Northglenn, CO last sold on Jan 7, 2026 for $442,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 12237 Karls Ln, Northglenn, CO?

12237 Karls Ln, Northglenn, CO has 3 bedrooms, 2.5 bathrooms, 1,484 square feet of living space and a 0.05-acre lot.

When was 12237 Karls Ln, Northglenn, CO built?

12237 Karls Ln, Northglenn, CO was built in 2022, making it 4 years old. It is a townhouse home. The building has 2 stories.

What schools serve 12237 Karls Ln, Northglenn, CO?

12237 Karls Ln, Northglenn, CO is assigned to Century Middle School (middle), rated C-; Hunters Glen Elementary School (elementary), rated C; Mountain Range High School (high), rated B. All sit in Northglenn-Thornton School District 12. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 12237 Karls Ln, Northglenn, CO compare to other homes in Thornton 80241?

Among the 10,624 homes in Thornton 80241, it is worth more than 20% of them ($436,863 against a typical $515,339), its price per square foot is higher than 49% of them ($294 against a typical $297), it is bigger than 34% of them (1,484 ft² against a typical 1,695 ft²), its lot is bigger than 6% of them (2,000 ft² against a typical 0.15 ac) and it is newer than almost all of them (2022 against a typical 1996). Measured against all of Adams County, it is worth more than 37% 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 12237 Karls Ln, Northglenn, CO?

The 2025 property tax bill for 12237 Karls Ln, Northglenn, CO was $6,767. The county assessed it at $34,410.

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