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Rural ResidenceResidential
$91,932$131 / 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 87How 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 $15,000 on Oct 28, 2021

540 W 4TH ST

AJO, AZ 85321
1
Baths
704 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.
0.53 ac
Lot SizeThe size of the land the home sits on, from county records.
1958
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$92K
$80K low$104K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$15,000 · Oct 28, 2021

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$416 (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.$4,600 (2026)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$4,381
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$68,141

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.53
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
81
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
82
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
5
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.

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Rural Residence
CountyPIMA
Lot (acres)The size of the land the home sits on, from county records.0.53
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Floor/Wall Furnace
CoolingThe type of cooling or air conditioning in the home.Evaporative
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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.

H
Ajo High SchoolD+
High · Grades 9–12 · 0.8 mi
E
Ajo Elementary SchoolD
Elementary · Grades PK–8 · 0.8 mi

District: Ajo Unified District

Neighborhood · ZIP 85321These 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.130
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.87

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.75%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.5%
PopulationHow many people live in this area.5,407
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$40,321
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$54,773
Average tempThe average temperature here across a full year.71°F
Annual precipHow much rain and melted snow falls here in a typical year.7 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.87%

Owner Tools

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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

540 W 4th 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.

  • Among the least valuable homes in Pima County
  • Costs less per square foot than 98% of homes in Pima County
  • Smaller than 96% of homes in Pima County
  • Has a bigger lot than 78% of homes in Pima County
  • Older than 89% of homes in Pima County

What homes are worth in Ajo 85321

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

This home
$58K$277K

This home is worth more than 22% of homes in Ajo 85321.

How it measures up in Ajo 85321

The dot is this home. The mark in the middle is the typical home in Ajo 85321.

Estimated value$91,932
CheaperTypical $128,866Pricier

Pricier than 22% of homes nearby

Price per ft²$131
CheaperTypical $119Pricier

Pricier than 63% of homes nearby

Living area704 ft²
SmallerTypical 1,085 ft²Bigger

Bigger than 13% of homes nearby

Lot size0.53 ac
SmallerTypical 0.18 acBigger

Bigger than 72% of homes nearby

Year built1958
OlderTypical 1959Newer

Newer than 49% of homes nearby

How 540 W 4th St ranks against every home in each area.
MeasureThis homeAjo 85321Pima County
Estimated valuepricier than$91,93222% of homesalmost no homes
Price per ft²pricier than$13163% of homes2% of homes
Living areabigger than704 ft²13% of homes4% of homes
Lot sizebigger than0.53 ac72% of homes78% of homes
Year builtnewer than195849% of homes11% of homes

About 540 W 4th St

How much is 540 W 4th St, Ajo, AZ worth?

The TopHap Estimate for 540 W 4th St, Ajo, AZ is $91,932 as of Sep 24, 2026. The likely range is $80,098 to $103,766. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 540 W 4th St, Ajo, AZ last sell?

540 W 4th St, Ajo, AZ last sold on Oct 28, 2021 for $15,000, according to the county's recorded deed.

How big is 540 W 4th St, Ajo, AZ?

540 W 4th St, Ajo, AZ has 1 bathrooms, 704 square feet of living space and a 0.53-acre lot.

When was 540 W 4th St, Ajo, AZ built?

540 W 4th St, Ajo, AZ was built in 1958, making it 68 years old. The building has 1 story.

What schools serve 540 W 4th St, Ajo, AZ?

540 W 4th St, Ajo, AZ is assigned to Ajo High School (high), rated D+; Ajo Elementary School (elementary), rated D. All sit in Ajo Unified District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 540 W 4th St, Ajo, AZ compare to other homes in Ajo 85321?

Among the 1,734 homes in Ajo 85321, it is worth more than 22% of them ($91,932 against a typical $128,866), its price per square foot is higher than 63% of them ($131 against a typical $119), it is bigger than 13% of them (704 ft² against a typical 1,085 ft²), its lot is bigger than 72% of them (0.53 ac against a typical 0.18 ac) and it is newer than 49% of them (1958 against a typical 1959). Measured against all of Pima County, it is worth more than almost no 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 540 W 4th St, Ajo, AZ?

The 2025 property tax bill for 540 W 4th St, Ajo, AZ was $416. The county assessed it at $4,600.

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