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Single Family ResidenceResidential
$1,017,973$502 / 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 88How 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

4488 RIVER ASH CT

CONCORD, CA 94521
4
Beds
3
Baths
2,026 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.
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1976
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1M
$895K low$1.1M high
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.$557,973
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$446,378
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.45%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$285,000
FIRST REPUBLIC BANK · recorded Mar 31, 2020
2nd MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$175,000
FIRST REPUBLIC BANK

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,922 (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.$368,432 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$121,028
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$247,404
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$361,208

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.34
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
79
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
43
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
36
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
14
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.

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
StyleThe architectural style of the home, such as ranch or colonial.Raised Ranch
CountyCONTRA COSTA
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.0.13
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Wood Shingle
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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(2)

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
Highlands Elementary SchoolB+
Elementary · Grades KG–5 · 1.6 mi
M
Foothill Middle SchoolA
Middle · Grades 6–8 · 2.6 mi
H
Northgate High SchoolA
High · Grades 9–12 · 3.1 mi

District: Mount Diablo Unified School District

Neighborhood · ZIP 94521These 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.96
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 100.556

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.3%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.4%
PopulationHow many people live in this area.43,000
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,071 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$121,996
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$147,183
Average tempThe average temperature here across a full year.58°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.78%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.Yes

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

4488 River Ash Ct 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 86% of homes in Concord 94521
  • Costs more per square foot than 77% of homes in Concord 94521
  • Bigger than 77% of homes in Concord 94521
  • Has a smaller lot than 78% of homes in Walnut Country The Crossings
  • Newer than 77% of homes in Walnut Country The Crossings

What homes are worth in Concord 94521

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

This home
$297K$1.5M

This home is worth more than 86% of homes in Concord 94521.

How it measures up in Concord 94521

The dot is this home. The mark in the middle is the typical home in Concord 94521.

Estimated value$1,017,973
CheaperTypical $732,335Pricier

Pricier than 86% of homes nearby

Price per ft²$502
CheaperTypical $449Pricier

Pricier than 77% of homes nearby

Living area2,026 ft²
SmallerTypical 1,588 ft²Bigger

Bigger than 77% of homes nearby

Lot size0.13 ac
SmallerTypical 0.17 acBigger

Bigger than 27% of homes nearby

Year built1976
OlderTypical 1972Newer

Newer than 68% of homes nearby

How 4488 River Ash Ct ranks against every home in each area.
MeasureThis homeWalnut Country The CrossingsConcord 94521Contra Costa County
Estimated valuepricier than$1,017,97356% of homes86% of homes68% of homes
Price per ft²pricier than$50242% of homes77% of homes57% of homes
Living areabigger than2,026 ft²61% of homes77% of homes62% of homes
Lot sizebigger than0.13 ac22% of homes27% of homes37% of homes
Year builtnewer than197677% of homes68% of homes49% of homes

About 4488 River Ash Ct

How much is 4488 River Ash Ct, Concord, CA worth?

The TopHap Estimate for 4488 River Ash Ct, Concord, CA is $1,017,973 as of Jul 14, 2026. The likely range is $895,051 to $1,140,895. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4488 River Ash Ct, Concord, CA last sell?

4488 River Ash Ct, Concord, CA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 4488 River Ash Ct, Concord, CA?

4488 River Ash Ct, Concord, CA has 4 bedrooms, 3 bathrooms, 2,026 square feet of living space and a 0.13-acre lot.

When was 4488 River Ash Ct, Concord, CA built?

4488 River Ash Ct, Concord, CA was built in 1976, making it 50 years old. It is a raised ranch home. The building has 2 stories.

What schools serve 4488 River Ash Ct, Concord, CA?

4488 River Ash Ct, Concord, CA is assigned to Highlands Elementary School (elementary), rated B+; Foothill Middle School (middle), rated A; Northgate High School (high), rated A. All sit in Mount Diablo Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4488 River Ash Ct, Concord, CA compare to other homes in Concord 94521?

Among the 14,273 homes in Concord 94521, it is worth more than 86% of them ($1,017,973 against a typical $732,335), its price per square foot is higher than 77% of them ($502 against a typical $449), it is bigger than 77% of them (2,026 ft² against a typical 1,588 ft²), its lot is bigger than 27% of them (0.13 ac against a typical 0.17 ac) and it is newer than 68% of them (1976 against a typical 1972). Measured against all of Contra Costa County, it is worth more than 68% 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 4488 River Ash Ct, Concord, CA?

The 2025 property tax bill for 4488 River Ash Ct, Concord, CA was $4,922. The county assessed it at $368,432.

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