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Single Family ResidenceResidential
$564,385$233 / 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 $50,000 on Jun 19, 2003

521 RIDGE AVE

LONGMONT, CO 80501
3
Beds
2.5
Baths
2,419 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
2003
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
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

$564K
$523K low$606K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$50,000 · Jun 19, 2003

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,842 (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.$39,814 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$7,480
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$32,334
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$36,594
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$585,500

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.25 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal

Scores 0–100; higher = greater projected risk.

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.A-Frame
CountyBOULDER
Lot (acres)The size of the land the home sits on, from county records.0.13
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.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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 · 194 ft²

Transaction History(2)

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
Burlington Elementary SchoolC+
Elementary · Grades PK–5 · 0.5 mi
M
Sunset Middle SchoolC+
Middle · Grades 6–8 · 1.0 mi
H
Niwot High SchoolA-
High · Grades 9–12 · 3.5 mi

District: St. Vrain Valley School District Re 1j

Neighborhood · ZIP 80501These 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.115
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.97
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.49

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.25%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.44,021
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,442 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$77,365
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$98,163
Average tempThe average temperature here across a full year.49°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

521 Ridge Ave 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 78% of homes in Southmoor Park
  • Costs less per square foot than 94% of homes in Boulder County
  • Bigger than 86% of homes in Longmont 80501
  • Has a smaller lot than 77% of homes in Longmont 80501
  • Newer than 90% of homes in Longmont 80501

What homes are worth in Longmont 80501

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

This home
$295K$901K

This home is worth more than 78% of homes in Longmont 80501.

How it measures up in Longmont 80501

The dot is this home. The mark in the middle is the typical home in Longmont 80501.

Estimated value$564,385
CheaperTypical $476,106Pricier

Pricier than 78% of homes nearby

Price per ft²$233
CheaperTypical $298Pricier

Pricier than 15% of homes nearby

Living area2,419 ft²
SmallerTypical 1,598 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.13 ac
SmallerTypical 0.16 acBigger

Bigger than 23% of homes nearby

Year built2003
OlderTypical 1975Newer

Newer than 90% of homes nearby

How 521 Ridge Ave ranks against every home in each area.
MeasureThis homeSouthmoor ParkLongmont 80501Boulder County
Estimated valuepricier than$564,38578% of homes78% of homes31% of homes
Price per ft²pricier than$23320% of homes15% of homes6% of homes
Living areabigger than2,419 ft²83% of homes86% of homes66% of homes
Lot sizebigger than0.13 ac28% of homes23% of homes25% of homes
Year builtnewer than200368% of homes90% of homes82% of homes

About 521 Ridge Ave

How much is 521 Ridge Ave, Longmont, CO worth?

The TopHap Estimate for 521 Ridge Ave, Longmont, CO is $564,385 as of Sep 24, 2026. The likely range is $522,692 to $606,078. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 521 Ridge Ave, Longmont, CO last sell?

521 Ridge Ave, Longmont, CO last sold on Jun 19, 2003 for $50,000, according to the county's recorded deed.

How big is 521 Ridge Ave, Longmont, CO?

521 Ridge Ave, Longmont, CO has 3 bedrooms, 2.5 bathrooms, 2,419 square feet of living space and a 0.13-acre lot.

When was 521 Ridge Ave, Longmont, CO built?

521 Ridge Ave, Longmont, CO was built in 2003, making it 23 years old. It is a a-frame home. The building has 2 stories.

What schools serve 521 Ridge Ave, Longmont, CO?

521 Ridge Ave, Longmont, CO is assigned to Burlington Elementary School (elementary), rated C+; Sunset Middle School (middle), rated C+; Niwot High School (high), rated A-. All sit in St. Vrain Valley School District Re 1j. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 521 Ridge Ave, Longmont, CO compare to other homes in Longmont 80501?

Among the 13,185 homes in Longmont 80501, it is worth more than 78% of them ($564,385 against a typical $476,106), its price per square foot is higher than 15% of them ($233 against a typical $298), it is bigger than 86% of them (2,419 ft² against a typical 1,598 ft²), its lot is bigger than 23% of them (0.13 ac against a typical 0.16 ac) and it is newer than 90% of them (2003 against a typical 1975). Measured against all of Boulder County, it is worth more than 31% 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 521 Ridge Ave, Longmont, CO?

The 2025 property tax bill for 521 Ridge Ave, Longmont, CO was $3,842. The county assessed it at $39,814.

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