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Single Family ResidenceResidential
$1,230,750$739 / 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 85How 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 $1,225,000 on Jun 20, 2025

423 SUMNER AVE

APTOS, CA 95003
2
Beds
2
Baths
1,665 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.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1973
Year BuiltThe year the home was originally built, according to county records.

Valuation

$1.2M
$1M low$1.4M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,225,000 · Jun 20, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$15,303 (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.$1,249,500 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$849,660
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$399,840
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,211,250
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$1,375,830

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.26
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
27
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
23
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
50
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
33
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.Single Family Residence
CountySANTA CRUZ
Lot (acres)The size of the land the home sits on, from county records.0.14
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.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

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
Aptos Junior HighB-
Middle · Grades 7–8 · 0.9 mi
E
Rio Del Mar ElementaryA-
Elementary · Grades KG–6 · 1.1 mi
H
Aptos High SchoolB
High · Grades 9–12 · 1.8 mi

District: Pajaro Valley Joint Unified School District

Neighborhood · ZIP 95003These 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.108
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.423

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.83%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.8%
PopulationHow many people live in this area.24,334
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.691 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,307
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$167,097
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.28 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

423 Sumner Ave 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 76% of homes in Seascape Golf Club
  • Smaller than 69% of homes in Seascape Golf Club
  • Has a smaller lot than 69% of homes in Seascape Golf Club

What homes are worth in Aptos 95003

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

This home
$620K$4M

This home is worth more than 46% of homes in Aptos 95003.

How it measures up in Aptos 95003

The dot is this home. The mark in the middle is the typical home in Aptos 95003.

Estimated value$1,230,750
CheaperTypical $1,273,598Pricier

Pricier than 46% of homes nearby

Price per ft²$739
CheaperTypical $728Pricier

Pricier than 52% of homes nearby

Living area1,665 ft²
SmallerTypical 1,686 ft²Bigger

Bigger than 49% of homes nearby

Lot size0.14 ac
SmallerTypical 0.14 acBigger

Bigger than 47% of homes nearby

Year built1973
OlderTypical 1976Newer

Newer than 44% of homes nearby

How 423 Sumner Ave ranks against every home in each area.
MeasureThis homeSeascape Golf ClubAptos 95003Santa Cruz County
Estimated valuepricier than$1,230,75024% of homes46% of homes62% of homes
Price per ft²pricier than$73952% of homes52% of homes63% of homes
Living areabigger than1,665 ft²31% of homes49% of homes57% of homes
Lot sizebigger than0.14 ac31% of homes47% of homes42% of homes
Year builtnewer than197361% of homes44% of homes54% of homes

About 423 Sumner Ave

How much is 423 Sumner Ave, Aptos, CA worth?

The TopHap Estimate for 423 Sumner Ave, Aptos, CA is $1,230,750 as of Sep 24, 2026. The likely range is $1,046,016 to $1,415,484. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 423 Sumner Ave, Aptos, CA last sell?

423 Sumner Ave, Aptos, CA last sold on Jun 20, 2025 for $1,225,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 423 Sumner Ave, Aptos, CA?

423 Sumner Ave, Aptos, CA has 2 bedrooms, 2 bathrooms, 1,665 square feet of living space and a 0.14-acre lot.

When was 423 Sumner Ave, Aptos, CA built?

423 Sumner Ave, Aptos, CA was built in 1973, making it 53 years old.

What schools serve 423 Sumner Ave, Aptos, CA?

423 Sumner Ave, Aptos, CA is assigned to Aptos Junior High (middle), rated B-; Rio Del Mar Elementary (elementary), rated A-; Aptos High School (high), rated B. All sit in Pajaro Valley Joint Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 423 Sumner Ave, Aptos, CA compare to other homes in Aptos 95003?

Among the 10,171 homes in Aptos 95003, it is worth more than 46% of them ($1,230,750 against a typical $1,273,598), its price per square foot is higher than 52% of them ($739 against a typical $728), it is bigger than 49% of them (1,665 ft² against a typical 1,686 ft²), its lot is bigger than 47% of them (0.14 ac against a typical 0.14 ac) and it is newer than 44% of them (1973 against a typical 1976). Measured against all of Santa Cruz County, it is worth more than 62% 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 423 Sumner Ave, Aptos, CA?

The 2025 property tax bill for 423 Sumner Ave, Aptos, CA was $15,303. The county assessed it at $1,249,500.

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