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Single Family ResidenceResidential
$1,044,472$522 / 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 93How 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

1243 BLENARM DR

WALNUT, CA 91789
4
Beds
2
Baths
2,002 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.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1979
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1M
$973K low$1.1M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,158 (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.$336,331 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$89,438
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$246,893
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$329,737

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.Contemporary
CountyLOS ANGELES
Lot (acres)The size of the land the home sits on, from county records.0.20
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.Tile
HeatingThe type of heating system in the home.Solar
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.Yes

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
South Pointe Middle SchoolA+
Middle · Grades 6–8 · 0.4 mi
E
Walnut Elementary SchoolA+
Elementary · Grades KG–5 · 0.4 mi
H
Diamond Bar High SchoolA
High · Grades 9–12 · 1.2 mi

District: Walnut Valley Unified School District

Neighborhood · ZIP 91789These 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.33
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 100.413

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.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.6%
PopulationHow many people live in this area.45,013
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,690 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,530
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$137,487
Average tempThe average temperature here across a full year.64°F
Annual precipHow much rain and melted snow falls here in a typical year.18 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

1243 Blenarm Dr 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 67% of homes in Los Angeles County
  • Costs less per square foot than 74% of homes in Walnut 91789
  • Bigger than 69% of homes in Los Angeles County
  • Has a smaller lot than 65% of homes in Walnut 91789
  • Newer than 76% of homes in Los Angeles County

What homes are worth in Walnut 91789

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

This home
$511K$2.8M

This home is worth more than 41% of homes in Walnut 91789.

How it measures up in Walnut 91789

The dot is this home. The mark in the middle is the typical home in Walnut 91789.

Estimated value$1,044,472
CheaperTypical $1,108,255Pricier

Pricier than 41% of homes nearby

Price per ft²$522
CheaperTypical $562Pricier

Pricier than 26% of homes nearby

Living area2,002 ft²
SmallerTypical 1,986 ft²Bigger

Bigger than 51% of homes nearby

Lot size0.2 ac
SmallerTypical 0.23 acBigger

Bigger than 35% of homes nearby

Year built1979
OlderTypical 1983Newer

Newer than 40% of homes nearby

How 1243 Blenarm Dr ranks against every home in each area.
MeasureThis homeWalnut 91789Los Angeles County
Estimated valuepricier than$1,044,47241% of homes67% of homes
Price per ft²pricier than$52226% of homes37% of homes
Living areabigger than2,002 ft²51% of homes69% of homes
Lot sizebigger than0.2 ac35% of homes65% of homes
Year builtnewer than197940% of homes76% of homes

About 1243 Blenarm Dr

How much is 1243 Blenarm Dr, Walnut, CA worth?

The TopHap Estimate for 1243 Blenarm Dr, Walnut, CA is $1,044,472 as of Oct 21, 2026. The likely range is $972,706 to $1,116,238. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 1243 Blenarm Dr, Walnut, CA last sell?

1243 Blenarm Dr, Walnut, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 1243 Blenarm Dr, Walnut, CA?

1243 Blenarm Dr, Walnut, CA has 4 bedrooms, 2 bathrooms, 2,002 square feet of living space and a 0.20-acre lot.

When was 1243 Blenarm Dr, Walnut, CA built?

1243 Blenarm Dr, Walnut, CA was built in 1979, making it 47 years old. It is a contemporary home. The building has 1 story.

What schools serve 1243 Blenarm Dr, Walnut, CA?

1243 Blenarm Dr, Walnut, CA is assigned to South Pointe Middle School (middle), rated A+; Walnut Elementary School (elementary), rated A+; Diamond Bar High School (high), rated A. All sit in Walnut Valley Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 1243 Blenarm Dr, Walnut, CA compare to other homes in Walnut 91789?

Among the 13,244 homes in Walnut 91789, it is worth more than 41% of them ($1,044,472 against a typical $1,108,255), its price per square foot is higher than 26% of them ($522 against a typical $562), it is bigger than 51% of them (2,002 ft² against a typical 1,986 ft²), its lot is bigger than 35% of them (0.2 ac against a typical 0.23 ac) and it is newer than 40% of them (1979 against a typical 1983). Measured against all of Los Angeles County, it is worth more than 67% 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 1243 Blenarm Dr, Walnut, CA?

The 2025 property tax bill for 1243 Blenarm Dr, Walnut, CA was $8,158. The county assessed it at $336,331.

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