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Single Family ResidenceResidential
$1,109,360$292 / 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 $850,500 on Dec 30, 2016

458 PORTSMOUTH DR

BRENTWOOD, CA 94513
5
Beds
4.5
Baths
3,800 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.
0.23 ac
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.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.1M
$1M low$1.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$850,500 · Dec 30, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$15,823 (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.$1,098,322 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$195,324
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$902,998
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,076,788

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.
75
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
44
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.0.23
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.Yes

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.

E
Mary Casey Black Elementary SchoolB-
Elementary · Grades KG–5 · 0.2 mi
H
Liberty High SchoolB
High · Grades 9–12 · 1.1 mi
M
Edna Hill Middle SchoolB
Middle · Grades 6–8 · 1.4 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

458 Portsmouth 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 93% of homes in Barrington
  • Costs less per square foot than 91% of homes in Contra Costa County
  • Bigger than 96% of homes in Contra Costa County
  • Has a bigger lot than 97% of homes in Barrington
  • Newer than 96% 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
$427K$1.3M

This home is worth more than 93% 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$1,109,360
CheaperTypical $752,026Pricier

Pricier than 93% of homes nearby

Price per ft²$292
CheaperTypical $331Pricier

Pricier than 22% of homes nearby

Living area3,800 ft²
SmallerTypical 2,271 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.23 ac
SmallerTypical 0.16 acBigger

Bigger than 83% of homes nearby

Year built2016
OlderTypical 2002Newer

Newer than 90% of homes nearby

How 458 Portsmouth Dr ranks against every home in each area.
MeasureThis homeBarringtonBrentwood 94513Contra Costa County
Estimated valuepricier than$1,109,36093% of homes93% of homes72% of homes
Price per ft²pricier than$29247% of homes22% of homes9% of homes
Living areabigger than3,800 ft²94% of homes95% of homes96% of homes
Lot sizebigger than0.23 ac97% of homes83% of homes76% of homes
Year builtnewer than201678% of homes90% of homes96% of homes

About 458 Portsmouth Dr

How much is 458 Portsmouth Dr, Brentwood, CA worth?

The TopHap Estimate for 458 Portsmouth Dr, Brentwood, CA is $1,109,360 as of Sep 24, 2026. The likely range is $1,031,660 to $1,187,060. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 458 Portsmouth Dr, Brentwood, CA last sell?

458 Portsmouth Dr, Brentwood, CA last sold on Dec 30, 2016 for $850,500, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 458 Portsmouth Dr, Brentwood, CA?

458 Portsmouth Dr, Brentwood, CA has 5 bedrooms, 4.5 bathrooms, 3,800 square feet of living space and a 0.23-acre lot.

When was 458 Portsmouth Dr, Brentwood, CA built?

458 Portsmouth Dr, Brentwood, CA was built in 2016, making it 10 years old. The building has 2 stories.

What schools serve 458 Portsmouth Dr, Brentwood, CA?

458 Portsmouth Dr, Brentwood, CA is assigned to Mary Casey Black Elementary School (elementary), rated B-; Liberty High School (high), rated B; Edna Hill Middle School (middle), rated B. All sit in Brentwood Union Elementary School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 458 Portsmouth Dr, Brentwood, CA compare to other homes in Brentwood 94513?

Among the 21,449 homes in Brentwood 94513, it is worth more than 93% of them ($1,109,360 against a typical $752,026), its price per square foot is higher than 22% of them ($292 against a typical $331), it is bigger than 95% of them (3,800 ft² against a typical 2,271 ft²), its lot is bigger than 83% of them (0.23 ac 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 72% 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 458 Portsmouth Dr, Brentwood, CA?

The 2025 property tax bill for 458 Portsmouth Dr, Brentwood, CA was $15,823. The county assessed it at $1,098,322.

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