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Duplex (2 Units, Any Combination)Residential
$100,794$35 / 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 85How 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 $68,800 on Nov 17, 2017

423 N DALLAS ST

ALTON, TX 78573
3
Beds
8
Baths
2,904 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.
0.31 ac
Lot SizeThe size of the land the home sits on, from county records.
1970
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$101K
$86K low$116K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$68,800 · Nov 17, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,580 (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.$155,262 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$76,276
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$78,986
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$172,513
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$155,262

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.50
18
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
77
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
100
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
31
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
24
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.15 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%

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
CountyHIDALGO
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.2017
Lot (acres)The size of the land the home sits on, from county records.0.31
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
CoolingThe type of cooling or air conditioning in the home.Yes
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.Patio · 64 ft²Porch · 72 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.

E
Alton Elementary SchoolC-
Elementary · Grades EE–5 · 0.1 mi
M
Rafael Cantu Junior High SchoolC
Middle · Grades 6–8 · 1.8 mi
H
Veterans Memorial High SchoolC
High · Grades 9–12 · 3.3 mi

District: Mission Consolidated Independent School District

Neighborhood · ZIP 78573These 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.79
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 100.11

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.12%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.21%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.9%
PopulationHow many people live in this area.44,921
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,194 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$51,533
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$74,354
Average tempThe average temperature here across a full year.74°F
Annual precipHow much rain and melted snow falls here in a typical year.23 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.60%

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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

423 N Dallas 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 less than 94% of homes in Mission 78573
  • Among the lowest price per square foot in Alton
  • Bigger than 91% of homes in Hidalgo County
  • Has a bigger lot than 81% of homes in Alton
  • Older than 96% of homes in Alton

What homes are worth in Mission 78573

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

This home
$83K$856K

This home is worth more than 6% of homes in Mission 78573.

How it measures up in Mission 78573

The dot is this home. The mark in the middle is the typical home in Mission 78573.

Estimated value$100,794
CheaperTypical $214,665Pricier

Pricier than 6% of homes nearby

Price per ft²$35
CheaperTypical $135Pricier

Cheaper than almost all homes nearby

Living area2,904 ft²
SmallerTypical 1,592 ft²Bigger

Bigger than 86% of homes nearby

Lot size0.31 ac
SmallerTypical 0.21 acBigger

Bigger than 64% of homes nearby

Year built1970
OlderTypical 2001Newer

Newer than 4% of homes nearby

How 423 N Dallas St ranks against every home in each area.
MeasureThis homeAltonMission 78573Hidalgo County
Estimated valuepricier than$100,79410% of homes6% of homes10% of homes
Price per ft²pricier than$35almost no homesalmost no homesalmost no homes
Living areabigger than2,904 ft²90% of homes86% of homes91% of homes
Lot sizebigger than0.31 ac81% of homes64% of homes71% of homes
Year builtnewer than19704% of homes4% of homes5% of homes

About 423 N Dallas St

How much is 423 N Dallas St, Alton, TX worth?

The TopHap Estimate for 423 N Dallas St, Alton, TX is $100,794 as of Aug 30, 2026. The likely range is $85,798 to $115,790. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 N Dallas St, Alton, TX last sell?

423 N Dallas St, Alton, TX last sold on Nov 17, 2017 for $68,800, according to the county's recorded deed.

How big is 423 N Dallas St, Alton, TX?

423 N Dallas St, Alton, TX has 3 bedrooms, 8 bathrooms, 2,904 square feet of living space and a 0.31-acre lot.

When was 423 N Dallas St, Alton, TX built?

423 N Dallas St, Alton, TX was built in 1970, making it 56 years old. It is a duplex single home. The building has 1 story.

What schools serve 423 N Dallas St, Alton, TX?

423 N Dallas St, Alton, TX is assigned to Alton Elementary School (elementary), rated C-; Rafael Cantu Junior High School (middle), rated C; Veterans Memorial High School (high), rated C. All sit in Mission Consolidated Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 N Dallas St, Alton, TX compare to other homes in Mission 78573?

Among the 12,156 homes in Mission 78573, it is worth more than 6% of them ($100,794 against a typical $214,665), its price per square foot is higher than almost none of them ($35 against a typical $135), it is bigger than 86% of them (2,904 ft² against a typical 1,592 ft²), its lot is bigger than 64% of them (0.31 ac against a typical 0.21 ac) and it is newer than 4% of them (1970 against a typical 2001). Measured against all of Hidalgo County, it is worth more than 10% 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 423 N Dallas St, Alton, TX?

The 2025 property tax bill for 423 N Dallas St, Alton, TX was $4,580. The county assessed it at $155,262.

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