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Planned Unit Development (Pud)Residential
$790,054$501 / 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 96How 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 $502,000 on Oct 20, 2017

663 ALDER LN

WALNUT, CA 91789
3
Beds
3
Baths
1,578 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.
1,472 ft²
Lot SizeThe size of the land the home sits on, from county records.
1986
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$790K
$757K low$823K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$502,000 · Oct 20, 2017

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,351 (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.$582,607 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$234,434
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$348,173
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$571,185

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.10 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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.minimal

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Planned Unit Development (Pud)
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyLOS ANGELES
Lot (acres)The size of the land the home sits on, from county records.0.03
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.Composition 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.No

Transaction History(7)

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
Walnut Elementary SchoolA
Elementary · Grades KG–5 · 0.9 mi
H
Walnut High SchoolA+
High · Grades 9–12 · 1.1 mi
M
South Pointe Middle SchoolA+
Middle · Grades 6–8 · 1.3 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

663 Alder Ln 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 less than 91% of homes in Walnut 91789
  • Costs less per square foot than 88% of homes in Walnut 91789
  • Smaller than 77% of homes in Walnut 91789
  • Among the smallest lots in Walnut 91789
  • Newer than 82% 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
$493K$2.6M

This home is worth more than 9% 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$790,054
CheaperTypical $1,118,306Pricier

Pricier than 9% of homes nearby

Price per ft²$501
CheaperTypical $565Pricier

Pricier than 12% of homes nearby

Living area1,578 ft²
SmallerTypical 1,990 ft²Bigger

Bigger than 23% of homes nearby

Lot size1,472 ft²
SmallerTypical 0.23 acBigger

Smaller than almost all homes nearby

Year built1986
OlderTypical 1983Newer

Newer than 69% of homes nearby

How 663 Alder Ln ranks against every home in each area.
MeasureThis homeWalnut 91789Los Angeles County
Estimated valuepricier than$790,0549% of homes43% of homes
Price per ft²pricier than$50112% of homes31% of homes
Living areabigger than1,578 ft²23% of homes50% of homes
Lot sizebigger than1,472 ft²almost no homesalmost no homes
Year builtnewer than198669% of homes82% of homes

About 663 Alder Ln

How much is 663 Alder Ln, Walnut, CA worth?

The TopHap Estimate for 663 Alder Ln, Walnut, CA is $790,054 as of Sep 24, 2026. The likely range is $757,169 to $822,939. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 663 Alder Ln, Walnut, CA last sell?

663 Alder Ln, Walnut, CA last sold on Oct 20, 2017 for $502,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 663 Alder Ln, Walnut, CA?

663 Alder Ln, Walnut, CA has 3 bedrooms, 3 bathrooms, 1,578 square feet of living space and a 0.03-acre lot.

When was 663 Alder Ln, Walnut, CA built?

663 Alder Ln, Walnut, CA was built in 1986, making it 40 years old. It is a cape cod home. The building has 2 stories.

What schools serve 663 Alder Ln, Walnut, CA?

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

How does 663 Alder Ln, Walnut, CA compare to other homes in Walnut 91789?

Among the 13,202 homes in Walnut 91789, it is worth more than 9% of them ($790,054 against a typical $1,118,306), its price per square foot is higher than 12% of them ($501 against a typical $565), it is bigger than 23% of them (1,578 ft² against a typical 1,990 ft²), its lot is bigger than almost none of them (1,472 ft² against a typical 0.23 ac) and it is newer than 69% of them (1986 against a typical 1983). Measured against all of Los Angeles County, it is worth more than 43% 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 663 Alder Ln, Walnut, CA?

The 2025 property tax bill for 663 Alder Ln, Walnut, CA was $7,351. The county assessed it at $582,607.

More homes on Alder Ln

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Assigned schools

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