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TownhouseResidential
$507,079$350 / 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 94How 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
Last sold for $515,000 on May 22, 2024

309 ROSEMARIE PL

BAY POINT, CA 94565
3
Beds
2.5
Baths
1,447 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.
2,340 ft²
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$507K
$475K low$539K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$515,000 · May 22, 2024
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.$50,079
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$40,063
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.91%
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.$457,000
AMERIS BANK · recorded Oct 17, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,608 (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.$497,000 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$231,612
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$265,388
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$525,300

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.
82
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
41
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
32
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.Townhouse
StyleThe architectural style of the home, such as ranch or colonial.Townhouse
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.1992
Lot (acres)The size of the land the home sits on, from county records.0.05
HeatingThe type of heating system 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(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
Rio Vista Elementary SchoolD
Elementary · Grades KG–5 · 0.1 mi
M
Riverview Middle SchoolC-
Middle · Grades 6–8 · 0.5 mi
H
Mt. Diablo High SchoolD+
High · Grades 9–12 · 4.7 mi

District: Mount Diablo Unified School District

Neighborhood · ZIP 94565These 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.83
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.85
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.393

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.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.11%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.98,541
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,554 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$86,849
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$110,627
Average tempThe average temperature here across a full year.59°F
Annual precipHow much rain and melted snow falls here in a typical year.19 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.No

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

309 Rosemarie Pl 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 83% of homes in Contra Costa County
  • Costs less per square foot than 79% of homes in Contra Costa County
  • Smaller than 67% of homes in Contra Costa County
  • Has a smaller lot than 95% of homes in Pittsburg 94565
  • Newer than 65% of homes in Contra Costa County

What homes are worth in Pittsburg 94565

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

This home
$288K$904K

This home is worth more than 44% of homes in Pittsburg 94565.

How it measures up in Pittsburg 94565

The dot is this home. The mark in the middle is the typical home in Pittsburg 94565.

Estimated value$507,079
CheaperTypical $522,749Pricier

Pricier than 44% of homes nearby

Price per ft²$350
CheaperTypical $345Pricier

Pricier than 53% of homes nearby

Living area1,447 ft²
SmallerTypical 1,497 ft²Bigger

Bigger than 45% of homes nearby

Lot size2,340 ft²
SmallerTypical 0.14 acBigger

Bigger than 5% of homes nearby

Year built1987
OlderTypical 1980Newer

Newer than 62% of homes nearby

How 309 Rosemarie Pl ranks against every home in each area.
MeasureThis homePittsburg 94565Contra Costa County
Estimated valuepricier than$507,07944% of homes17% of homes
Price per ft²pricier than$35053% of homes21% of homes
Living areabigger than1,447 ft²45% of homes33% of homes
Lot sizebigger than2,340 ft²5% of homes12% of homes
Year builtnewer than198762% of homes65% of homes

About 309 Rosemarie Pl

How much is 309 Rosemarie Pl, Bay Point, CA worth?

The TopHap Estimate for 309 Rosemarie Pl, Bay Point, CA is $507,079 as of Jul 14, 2026. The likely range is $475,452 to $538,706. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 309 Rosemarie Pl, Bay Point, CA last sell?

309 Rosemarie Pl, Bay Point, CA last sold on May 22, 2024 for $515,000, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 309 Rosemarie Pl, Bay Point, CA?

309 Rosemarie Pl, Bay Point, CA has 3 bedrooms, 2.5 bathrooms, 1,447 square feet of living space and a 0.05-acre lot.

When was 309 Rosemarie Pl, Bay Point, CA built?

309 Rosemarie Pl, Bay Point, CA was built in 1987, making it 39 years old. It is a townhouse home. The building has 2 stories.

What schools serve 309 Rosemarie Pl, Bay Point, CA?

309 Rosemarie Pl, Bay Point, CA is assigned to Rio Vista Elementary School (elementary), rated D; Riverview Middle School (middle), rated C-; Mt. Diablo High School (high), rated D+. All sit in Mount Diablo Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 309 Rosemarie Pl, Bay Point, CA compare to other homes in Pittsburg 94565?

Among the 24,012 homes in Pittsburg 94565, it is worth more than 44% of them ($507,079 against a typical $522,749), its price per square foot is higher than 53% of them ($350 against a typical $345), it is bigger than 45% of them (1,447 ft² against a typical 1,497 ft²), its lot is bigger than 5% of them (2,340 ft² against a typical 0.14 ac) and it is newer than 62% of them (1987 against a typical 1980). Measured against all of Contra Costa County, it is worth more than 17% 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 309 Rosemarie Pl, Bay Point, CA?

The 2025 property tax bill for 309 Rosemarie Pl, Bay Point, CA was $6,608. The county assessed it at $497,000.

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