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Single Family ResidenceResidential
$342,477$136 / 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 88How 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 $223,700 on Aug 23, 2017

509 TESORO AVE

RANCHO VIEJO, TX 78575
3
Beds
2
Baths
2,512 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.
0.39 ac
Lot SizeThe size of the land the home sits on, from county records.
1988
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$342K
$303K low$382K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$223,700 · Aug 23, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,109 (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.$248,389 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$225,808
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$355,134

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.57
39
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
63
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
99
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
39
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
47
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.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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
CountyCAMERON
Lot (acres)The size of the land the home sits on, from county records.0.39
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 · 298 ft²

Transaction History(4)

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
Charles Stillman Middle SchoolB+
Middle · Grades 6–8 · 4.9 mi
E
Villa Nueva Elementary SchoolC+
Elementary · Grades KG–5 · 5.0 mi
H
Veterans Memorial Early College High SchoolA-
High · Grades 9–12 · 5.5 mi

District: Brownsville Independent School District

Neighborhood · ZIP 78575These 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.108
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.79
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.13

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.83%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
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.4,688
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.636 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$73,538
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$99,513
Average tempThe average temperature here across a full year.74°F
Annual precipHow much rain and melted snow falls here in a typical year.27 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

509 Tesoro 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 85% of homes in Cameron County
  • Costs less per square foot than 66% of homes in Olmito 78575
  • Bigger than 90% of homes in Cameron County
  • Has a bigger lot than 75% of homes in Cameron County

What homes are worth in Olmito 78575

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

This home
$107K$921K

This home is worth more than 67% of homes in Olmito 78575.

How it measures up in Olmito 78575

The dot is this home. The mark in the middle is the typical home in Olmito 78575.

Estimated value$342,477
CheaperTypical $282,858Pricier

Pricier than 67% of homes nearby

Price per ft²$136
CheaperTypical $150Pricier

Pricier than 34% of homes nearby

Living area2,512 ft²
SmallerTypical 1,953 ft²Bigger

Bigger than 71% of homes nearby

Lot size0.39 ac
SmallerTypical 0.35 acBigger

Bigger than 59% of homes nearby

Year built1988
OlderTypical 1984Newer

Newer than 58% of homes nearby

How 509 Tesoro Ave ranks against every home in each area.
MeasureThis homeOlmito 78575Cameron County
Estimated valuepricier than$342,47767% of homes85% of homes
Price per ft²pricier than$13634% of homes48% of homes
Living areabigger than2,512 ft²71% of homes90% of homes
Lot sizebigger than0.39 ac59% of homes75% of homes
Year builtnewer than198858% of homes47% of homes

About 509 Tesoro Ave

How much is 509 Tesoro Ave, Rancho Viejo, TX worth?

The TopHap Estimate for 509 Tesoro Ave, Rancho Viejo, TX is $342,477 as of Aug 30, 2026. The likely range is $302,743 to $382,211. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 Tesoro Ave, Rancho Viejo, TX last sell?

509 Tesoro Ave, Rancho Viejo, TX last sold on Aug 23, 2017 for $223,700, according to the county's recorded deed.

How big is 509 Tesoro Ave, Rancho Viejo, TX?

509 Tesoro Ave, Rancho Viejo, TX has 3 bedrooms, 2 bathrooms, 2,512 square feet of living space and a 0.39-acre lot.

When was 509 Tesoro Ave, Rancho Viejo, TX built?

509 Tesoro Ave, Rancho Viejo, TX was built in 1988, making it 38 years old. The building has 1 story.

What schools serve 509 Tesoro Ave, Rancho Viejo, TX?

509 Tesoro Ave, Rancho Viejo, TX is assigned to Charles Stillman Middle School (middle), rated B+; Villa Nueva Elementary School (elementary), rated C+; Veterans Memorial Early College High School (high), rated A-. All sit in Brownsville Independent School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 Tesoro Ave, Rancho Viejo, TX compare to other homes in Olmito 78575?

Among the 2,137 homes in Olmito 78575, it is worth more than 67% of them ($342,477 against a typical $282,858), its price per square foot is higher than 34% of them ($136 against a typical $150), it is bigger than 71% of them (2,512 ft² against a typical 1,953 ft²), its lot is bigger than 59% of them (0.39 ac against a typical 0.35 ac) and it is newer than 58% of them (1988 against a typical 1984). Measured against all of Cameron County, it is worth more than 85% 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 509 Tesoro Ave, Rancho Viejo, TX?

The 2025 property tax bill for 509 Tesoro Ave, Rancho Viejo, TX was $3,109. The county assessed it at $248,389.

More homes on Tesoro Ave

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