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Single Family ResidenceResidential
$546,176$267 / 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 84How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $205,000 on Nov 14, 2000

509 W UNION AVE

MODESTO, CA 95356
3
Beds
2
Baths
2,048 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.
0.18 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$546K
$459K low$634K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$205,000 · Nov 14, 2000

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$3,132 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$291,545 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$76,837
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$214,708
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$285,830

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.46
25
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
44
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
50
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
13
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
98
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.6 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.0.2 percent flood zone

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
CountySTANISLAUS
Lot (acres)The size of the land the home sits on, from county records.0.18
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.Central
CoolingThe type of cooling or air conditioning in the home.Central
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.Pool W/Hot Tub/Spa
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 240 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
Woodrow Elementary SchoolC
Elementary · Grades KG–5 · 0.7 mi
H
Grace M. Davis High SchoolD+
High · Grades 9–12 · 1.0 mi
M
Somerset Middle SchoolC
Middle · Grades 6–8 · 1.5 mi

District: Modesto City High School District

Neighborhood · ZIP 95356These 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.100
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.82
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.141

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.20%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.2.1%
PopulationHow many people live in this area.34,264
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,547 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$91,584
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$116,143
Average tempThe average temperature here across a full year.61°F
Annual precipHow much rain and melted snow falls here in a typical year.13 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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 W Union 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 79% of homes in Stanislaus County
  • Costs less per square foot than 65% of homes in Stanislaus County
  • Bigger than 75% of homes in Stanislaus County
  • Has a bigger lot than 73% of homes in Modesto 95356
  • Older than 82% of homes in Modesto 95356

What homes are worth in Modesto 95356

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

This home
$224K$1.6M

This home is worth more than 59% of homes in Modesto 95356.

How it measures up in Modesto 95356

The dot is this home. The mark in the middle is the typical home in Modesto 95356.

Estimated value$546,176
CheaperTypical $504,460Pricier

Pricier than 59% of homes nearby

Price per ft²$267
CheaperTypical $273Pricier

Pricier than 45% of homes nearby

Living area2,048 ft²
SmallerTypical 1,890 ft²Bigger

Bigger than 58% of homes nearby

Lot size0.18 ac
SmallerTypical 0.14 acBigger

Bigger than 73% of homes nearby

Year built1977
OlderTypical 1986Newer

Newer than 18% of homes nearby

How 509 W Union Ave ranks against every home in each area.
MeasureThis homeModesto 95356Stanislaus County
Estimated valuepricier than$546,17659% of homes79% of homes
Price per ft²pricier than$26745% of homes35% of homes
Living areabigger than2,048 ft²58% of homes75% of homes
Lot sizebigger than0.18 ac73% of homes72% of homes
Year builtnewer than197718% of homes40% of homes

About 509 W Union Ave

How much is 509 W Union Ave, Modesto, CA worth?

The TopHap Estimate for 509 W Union Ave, Modesto, CA is $546,176 as of Oct 21, 2026. The likely range is $458,706 to $633,646. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 509 W Union Ave, Modesto, CA last sell?

509 W Union Ave, Modesto, CA last sold on Nov 14, 2000 for $205,000, according to the county's recorded deed.

How big is 509 W Union Ave, Modesto, CA?

509 W Union Ave, Modesto, CA has 3 bedrooms, 2 bathrooms, 2,048 square feet of living space and a 0.18-acre lot.

When was 509 W Union Ave, Modesto, CA built?

509 W Union Ave, Modesto, CA was built in 1977, making it 49 years old. The building has 1 story.

What schools serve 509 W Union Ave, Modesto, CA?

509 W Union Ave, Modesto, CA is assigned to Woodrow Elementary School (elementary), rated C; Grace M. Davis High School (high), rated D+; Somerset Middle School (middle), rated C. All sit in Modesto City High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 509 W Union Ave, Modesto, CA compare to other homes in Modesto 95356?

Among the 10,100 homes in Modesto 95356, it is worth more than 59% of them ($546,176 against a typical $504,460), its price per square foot is higher than 45% of them ($267 against a typical $273), it is bigger than 58% of them (2,048 ft² against a typical 1,890 ft²), its lot is bigger than 73% of them (0.18 ac against a typical 0.14 ac) and it is newer than 18% of them (1977 against a typical 1986). Measured against all of Stanislaus County, it is worth more than 79% 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 W Union Ave, Modesto, CA?

The 2026 property tax bill for 509 W Union Ave, Modesto, CA was $3,132. The county assessed it at $291,545.

More homes on W Union Ave

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