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Duplex (2 Units, Any Combination)Residential
Last sold for $127,500 on Mar 26, 2012

603 12TH ST

ALAMOSA, CO 81101
3
Beds
2
Baths
2,264 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.
0.19 ac
Lot SizeThe size of the land the home sits on, from county records.
1935
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$127,500 · Mar 26, 2012

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$731 (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.$9,361 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$1,045
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$8,316
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$8,548
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$149,772

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.31
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
39
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
47
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
1
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
69
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.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyALAMOSA
Lot (acres)The size of the land the home sits on, from county records.0.19
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.Roll Composition (rolled Mineral Roof)
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.None
PoolWhether the property has a pool, and what kind, such as in-ground.No

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.

E
Alamosa Elementary SchoolB-
Elementary · Grades KG–5 · 1.1 mi
M
Ortega Middle SchoolC
Middle · Grades 6–8 · 1.6 mi
H
Alamosa High SchoolC
High · Grades 9–12 · 2.3 mi

District: Alamosa School District Re-11j

Neighborhood · ZIP 81101These 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.106
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.88
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.74

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.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.14%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.15,741
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.40 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$55,574
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$79,364
Average tempThe average temperature here across a full year.42°F
Annual precipHow much rain and melted snow falls here in a typical year.8 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.81%

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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

603 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.

  • Bigger than 85% of homes in Alamosa 81101
  • Has a smaller lot than 71% of homes in Alamosa 81101
  • Older than 81% of homes in Alamosa 81101

How it measures up in Alamosa 81101

The dot is this home. The mark in the middle is the typical home in Alamosa 81101.

Living area2,264 ft²
SmallerTypical 1,454 ft²Bigger

Bigger than 85% of homes nearby

Lot size0.19 ac
SmallerTypical 0.33 acBigger

Bigger than 29% of homes nearby

Year built1935
OlderTypical 1975Newer

Newer than 19% of homes nearby

How 603 12th St ranks against every home in each area.
MeasureThis homeAlamosa 81101
Living areabigger than2,264 ft²85% of homes
Lot sizebigger than0.19 ac29% of homes
Year builtnewer than193519% of homes

About 603 12th St

When did 603 12th St, Alamosa, CO last sell?

603 12th St, Alamosa, CO last sold on Mar 26, 2012 for $127,500, according to the county's recorded deed.

How big is 603 12th St, Alamosa, CO?

603 12th St, Alamosa, CO has 3 bedrooms, 2 bathrooms, 2,264 square feet of living space and a 0.19-acre lot.

When was 603 12th St, Alamosa, CO built?

603 12th St, Alamosa, CO was built in 1935, making it 91 years old. It is a duplex single home. The building has 1 story.

What schools serve 603 12th St, Alamosa, CO?

603 12th St, Alamosa, CO is assigned to Alamosa Elementary School (elementary), rated B-; Ortega Middle School (middle), rated C; Alamosa High School (high), rated C. All sit in Alamosa School District Re-11j. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 603 12th St, Alamosa, CO compare to other homes in Alamosa 81101?

Among the 5,424 homes in Alamosa 81101, it is bigger than 85% of them (2,264 ft² against a typical 1,454 ft²), its lot is bigger than 29% of them (0.19 ac against a typical 0.33 ac) and it is newer than 19% of them (1935 against a typical 1975). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 603 12th St, Alamosa, CO?

The 2025 property tax bill for 603 12th St, Alamosa, CO was $731. The county assessed it at $9,361.

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