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Rural ResidenceResidential
$256,945$126 / 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 79How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $61,000 on Oct 29, 2001

20185 S RIVER RD

MAMMOTH, AZ 85618
0
Baths
2,040 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.
9 ac
Lot SizeThe size of the land the home sits on, from county records.
1978
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$257K
$202K low$312K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$61,000 · Oct 29, 2001
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$256,945
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$205,556

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$390 (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.$4,754 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$2,022
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$2,732
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$4,754
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$47,532

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.121 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.1 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.Rural Residence
CountyPinal
Lot (acres)The size of the land the home sits on, from county records.9.00
ConstructionThe main material the home's frame and walls are built from.Steel Frame
RoofThe main material covering the roof, such as asphalt shingle or tile.Composition Shingle
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Window A/C
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.

M
San Manuel Jr. High SchoolC-
Middle · Grades 6–8 · 6.7 mi
H
San Manuel High SchoolD
High · Grades 9–12 · 6.7 mi
E
San Manuel Elementary SchoolC+
Elementary · Grades PK–5 · 6.8 mi

District: Mammoth-San Manuel Unified District

Neighborhood · ZIP 85618These 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.152
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.65

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.84%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.1.6%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.26%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.1,516
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.31 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$39,005
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$50,848
Average tempThe average temperature here across a full year.65°F
Annual precipHow much rain and melted snow falls here in a typical year.17 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.86%

Ownership

Company ownedWhether the owner is a company or trust rather than a person.No

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

20185 S River Rd 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 91% of homes in Mammoth 85618
  • Costs less per square foot than 94% of homes in Pinal County
  • Bigger than 91% of homes in Mammoth 85618
  • Among the largest lots in Mammoth 85618
  • Older than 90% of homes in Pinal County

What homes are worth in Mammoth 85618

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

This home
$42K$409K

This home is worth more than 91% of homes in Mammoth 85618.

How it measures up in Mammoth 85618

The dot is this home. The mark in the middle is the typical home in Mammoth 85618.

Estimated value$256,945
CheaperTypical $131,896Pricier

Pricier than 91% of homes nearby

Price per ft²$126
CheaperTypical $109Pricier

Pricier than 70% of homes nearby

Living area2,040 ft²
SmallerTypical 1,202 ft²Bigger

Bigger than 91% of homes nearby

Lot size9 ac
SmallerTypical 0.23 acBigger

Bigger than almost all homes nearby

Year built1978
OlderTypical 1970Newer

Newer than 69% of homes nearby

How 20185 S River Rd ranks against every home in each area.
MeasureThis homeMammoth 85618Pinal County
Estimated valuepricier than$256,94591% of homes13% of homes
Price per ft²pricier than$12670% of homes6% of homes
Living areabigger than2,040 ft²91% of homes64% of homes
Lot sizebigger than9 acalmost all homesalmost all homes
Year builtnewer than197869% of homes10% of homes

About 20185 S River Rd

How much is 20185 S River Rd, Mammoth, AZ worth?

The TopHap Estimate for 20185 S River Rd, Mammoth, AZ is $256,945 as of Jul 14, 2026. The likely range is $202,005 to $311,885. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20185 S River Rd, Mammoth, AZ last sell?

20185 S River Rd, Mammoth, AZ last sold on Oct 29, 2001 for $61,000, according to the county's recorded deed.

How big is 20185 S River Rd, Mammoth, AZ?

20185 S River Rd, Mammoth, AZ has 2,040 square feet of living space and a 9.00-acre lot.

When was 20185 S River Rd, Mammoth, AZ built?

20185 S River Rd, Mammoth, AZ was built in 1978, making it 48 years old. The building has 1 story.

What schools serve 20185 S River Rd, Mammoth, AZ?

20185 S River Rd, Mammoth, AZ is assigned to San Manuel Jr. High School (middle), rated C-; San Manuel High School (high), rated D; San Manuel Elementary School (elementary), rated C+. All sit in Mammoth-San Manuel Unified District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20185 S River Rd, Mammoth, AZ compare to other homes in Mammoth 85618?

Among the 638 homes in Mammoth 85618, it is worth more than 91% of them ($256,945 against a typical $131,896), its price per square foot is higher than 70% of them ($126 against a typical $109), it is bigger than 91% of them (2,040 ft² against a typical 1,202 ft²), its lot is bigger than almost all of them (9 ac against a typical 0.23 ac) and it is newer than 69% of them (1978 against a typical 1970). Measured against all of Pinal County, it is worth more than 13% 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 20185 S River Rd, Mammoth, AZ?

The 2025 property tax bill for 20185 S River Rd, Mammoth, AZ was $390. The county assessed it at $4,754.

Closest homes

More homes in Mammoth 85618

Assigned schools

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