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Single Family ResidenceResidential
$1,239,326$446 / 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 92How 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

1730 CALLE ALTO

SAN DIMAS, CA 91773
4
Beds
3
Baths
2,778 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.
0.22 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.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.2M
$1.1M low$1.3M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,010 (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.$376,003 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$58,423
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$317,580
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$281,849

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Conventional
CountyLOS ANGELES
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.1988
Lot (acres)The size of the land the home sits on, from county records.0.22
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
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
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.Yes

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.

M
Lone Hill Middle SchoolA-
Middle · Grades 6–8 · 1.3 mi
H
San Dimas High SchoolA-
High · Grades 9–12 · 1.4 mi
E
Arma J. Shull Elementary SchoolA
Elementary · Grades KG–5 · 2.6 mi

District: Bonita Unified School District

Neighborhood · ZIP 91773These 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.68
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 100.549

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.7%
PopulationHow many people live in this area.33,478
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,155 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$100,808
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$124,896
Average tempThe average temperature here across a full year.63°F
Annual precipHow much rain and melted snow falls here in a typical year.20 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.73%

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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

1730 Calle Alto 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 87% of homes in San Dimas 91773
  • Costs less per square foot than 78% of homes in San Dimas 91773
  • Bigger than 90% of homes in San Dimas 91773
  • Has a bigger lot than 69% of homes in Los Angeles County
  • Newer than 73% of homes in Los Angeles County

What homes are worth in San Dimas 91773

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

This home
$486K$1.9M

This home is worth more than 87% of homes in San Dimas 91773.

How it measures up in San Dimas 91773

The dot is this home. The mark in the middle is the typical home in San Dimas 91773.

Estimated value$1,239,326
CheaperTypical $867,582Pricier

Pricier than 87% of homes nearby

Price per ft²$446
CheaperTypical $505Pricier

Pricier than 22% of homes nearby

Living area2,778 ft²
SmallerTypical 1,671 ft²Bigger

Bigger than 90% of homes nearby

Lot size0.22 ac
SmallerTypical 0.19 acBigger

Bigger than 65% of homes nearby

Year built1977
OlderTypical 1977Newer

Newer than 53% of homes nearby

How 1730 Calle Alto ranks against every home in each area.
MeasureThis homeSan Dimas 91773Los Angeles County
Estimated valuepricier than$1,239,32687% of homes77% of homes
Price per ft²pricier than$44622% of homes22% of homes
Living areabigger than2,778 ft²90% of homes85% of homes
Lot sizebigger than0.22 ac65% of homes69% of homes
Year builtnewer than197753% of homes73% of homes

About 1730 Calle Alto

How much is 1730 Calle Alto, San Dimas, CA worth?

The TopHap Estimate for 1730 Calle Alto, San Dimas, CA is $1,239,326 as of Aug 30, 2026. The likely range is $1,145,632 to $1,333,020. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1730 Calle Alto, San Dimas, CA last sell?

1730 Calle Alto, San Dimas, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 1730 Calle Alto, San Dimas, CA?

1730 Calle Alto, San Dimas, CA has 4 bedrooms, 3 bathrooms, 2,778 square feet of living space and a 0.22-acre lot.

When was 1730 Calle Alto, San Dimas, CA built?

1730 Calle Alto, San Dimas, CA was built in 1977, making it 49 years old. It is a conventional home. The building has 2 stories.

What schools serve 1730 Calle Alto, San Dimas, CA?

1730 Calle Alto, San Dimas, CA is assigned to Lone Hill Middle School (middle), rated A-; San Dimas High School (high), rated A-; Arma J. Shull Elementary School (elementary), rated A. All sit in Bonita Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1730 Calle Alto, San Dimas, CA compare to other homes in San Dimas 91773?

Among the 10,108 homes in San Dimas 91773, it is worth more than 87% of them ($1,239,326 against a typical $867,582), its price per square foot is higher than 22% of them ($446 against a typical $505), it is bigger than 90% of them (2,778 ft² against a typical 1,671 ft²), its lot is bigger than 65% of them (0.22 ac against a typical 0.19 ac) and it is newer than 53% of them (1977 against a typical 1977). Measured against all of Los Angeles County, it is worth more than 77% 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 1730 Calle Alto, San Dimas, CA?

The 2025 property tax bill for 1730 Calle Alto, San Dimas, CA was $5,010. The county assessed it at $376,003.

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