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Single Family ResidenceResidential
$593,985$253 / 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 Sep 24, 2026
Last sold for $480,000 on Jul 29, 2016

321 ALTA ST

BRENTWOOD, CA 94513
4
Beds
3
Baths
2,345 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.
2,675 ft²
Lot SizeThe size of the land the home sits on, from county records.
2016
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

$594K
$551K low$637K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$480,000 · Jul 29, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,036 (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.$567,978 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$189,405
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$378,573
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$556,842

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.33
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
72
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
45
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
23
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
25
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
CountyCONTRA COSTA
Lot (acres)The size of the land the home sits on, from county records.0.06
CoolingThe type of cooling or air conditioning in the home.Central
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
Garin Elementary SchoolB+
Elementary · Grades KG–5 · 0.6 mi
M
Edna Hill Middle SchoolB
Middle · Grades 6–8 · 0.7 mi
H
Liberty High SchoolB
High · Grades 9–12 · 1.1 mi

District: Brentwood Union Elementary School District

Neighborhood · ZIP 94513These 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.48
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.83
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.368

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.98%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.26%
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.1.4%
PopulationHow many people live in this area.76,553
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.833 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$129,971
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$155,579
Average tempThe average temperature here across a full year.60°F
Annual precipHow much rain and melted snow falls here in a typical year.16 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

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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

321 Alta St 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 84% of homes in Brentwood 94513
  • Costs less per square foot than 96% of homes in Brentwood 94513
  • Bigger than 74% of homes in Contra Costa County
  • Has a smaller lot than 97% of homes in Brentwood 94513
  • Newer than 97% of homes in Contra Costa County

What homes are worth in Brentwood 94513

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

This home
$417K$1.3M

This home is worth more than 16% of homes in Brentwood 94513.

How it measures up in Brentwood 94513

The dot is this home. The mark in the middle is the typical home in Brentwood 94513.

Estimated value$593,985
CheaperTypical $750,991Pricier

Pricier than 16% of homes nearby

Price per ft²$253
CheaperTypical $332Pricier

Pricier than 4% of homes nearby

Living area2,345 ft²
SmallerTypical 2,246 ft²Bigger

Bigger than 55% of homes nearby

Lot size2,675 ft²
SmallerTypical 0.16 acBigger

Bigger than 3% of homes nearby

Year built2016
OlderTypical 2002Newer

Newer than 90% of homes nearby

How 321 Alta St ranks against every home in each area.
MeasureThis homeBrentwood 94513Contra Costa County
Estimated valuepricier than$593,98516% of homes31% of homes
Price per ft²pricier than$2534% of homes4% of homes
Living areabigger than2,345 ft²55% of homes74% of homes
Lot sizebigger than2,675 ft²3% of homes14% of homes
Year builtnewer than201690% of homes97% of homes

About 321 Alta St

How much is 321 Alta St, Brentwood, CA worth?

The TopHap Estimate for 321 Alta St, Brentwood, CA is $593,985 as of Sep 24, 2026. The likely range is $550,551 to $637,419. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 321 Alta St, Brentwood, CA last sell?

321 Alta St, Brentwood, CA last sold on Jul 29, 2016 for $480,000, according to the county's recorded deed.

How big is 321 Alta St, Brentwood, CA?

321 Alta St, Brentwood, CA has 4 bedrooms, 3 bathrooms, 2,345 square feet of living space and a 0.06-acre lot.

When was 321 Alta St, Brentwood, CA built?

321 Alta St, Brentwood, CA was built in 2016, making it 10 years old. The building has 2 stories.

What schools serve 321 Alta St, Brentwood, CA?

321 Alta St, Brentwood, CA is assigned to Garin Elementary School (elementary), rated B+; Edna Hill Middle School (middle), rated B; Liberty High School (high), rated B. All sit in Brentwood Union Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 321 Alta St, Brentwood, CA compare to other homes in Brentwood 94513?

Among the 21,449 homes in Brentwood 94513, it is worth more than 16% of them ($593,985 against a typical $750,991), its price per square foot is higher than 4% of them ($253 against a typical $332), it is bigger than 55% of them (2,345 ft² against a typical 2,246 ft²), its lot is bigger than 3% of them (2,675 ft² against a typical 0.16 ac) and it is newer than 90% of them (2016 against a typical 2002). Measured against all of Contra Costa County, it is worth more than 31% 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 321 Alta St, Brentwood, CA?

The 2025 property tax bill for 321 Alta St, Brentwood, CA was $8,036. The county assessed it at $567,978.

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