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Single Family ResidenceResidential
$1,017,122$520 / 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 95How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Oct 21, 2026
Last sold for $519,000 on Aug 27, 2004

644 MOSAIC CIR

OCEANSIDE, CA 92057
4
Beds
2.5
Baths
1,957 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.
4,179 ft²
Lot SizeThe size of the land the home sits on, from county records.
1992
Year BuiltThe year the home was originally built, according to county records.
3
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1M
$963K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$519,000 · Aug 27, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,138 (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.$737,845 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$426,501
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$311,344
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$723,379

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.43
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
81
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
31
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
15
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
89
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
CountySAN DIEGO
Lot (acres)The size of the land the home sits on, from county records.0.96
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
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
Alamosa Park Elementary SchoolA-
Elementary · Grades KG–5 · 0.3 mi
M
Roosevelt Middle SchoolC-
Middle · Grades 6–8 · 0.4 mi
H
Vista High SchoolC
High · Grades 9–12 · 3.0 mi

District: Vista Unified School District

Neighborhood · ZIP 92057These 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.67
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.97
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.216

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.96%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.21%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.4%
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.55,095
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,704 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$100,851
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,948
Average tempThe average temperature here across a full year.62°F
Annual precipHow much rain and melted snow falls here in a typical year.14 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.68%

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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

644 Mosaic Cir 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 78% of homes in Oceanside 92057
  • Costs more per square foot than 65% of homes in Oceanside 92057
  • Bigger than 70% of homes in San Diego County
  • Among the smallest lots in Ivey Ranch / Rancho Del Oro
  • Newer than 66% of homes in San Diego County

What homes are worth in Oceanside 92057

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

This home
$384K$1.4M

This home is worth more than 78% of homes in Oceanside 92057.

How it measures up in Oceanside 92057

The dot is this home. The mark in the middle is the typical home in Oceanside 92057.

Estimated value$1,017,122
CheaperTypical $780,459Pricier

Pricier than 78% of homes nearby

Price per ft²$520
CheaperTypical $490Pricier

Pricier than 65% of homes nearby

Living area1,957 ft²
SmallerTypical 1,506 ft²Bigger

Bigger than 69% of homes nearby

Lot size4,179 ft²
SmallerTypical 0.26 acBigger

Smaller than almost all homes nearby

Year built1992
OlderTypical 1988Newer

Newer than 64% of homes nearby

How 644 Mosaic Cir ranks against every home in each area.
MeasureThis homeIvey Ranch / Rancho Del OroOceanside 92057San Diego County
Estimated valuepricier than$1,017,12273% of homes78% of homes61% of homes
Price per ft²pricier than$52063% of homes65% of homes39% of homes
Living areabigger than1,957 ft²65% of homes69% of homes70% of homes
Lot sizebigger than4,179 ft²almost no homesalmost no homes7% of homes
Year builtnewer than199244% of homes64% of homes66% of homes

About 644 Mosaic Cir

How much is 644 Mosaic Cir, Oceanside, CA worth?

The TopHap Estimate for 644 Mosaic Cir, Oceanside, CA is $1,017,122 as of Oct 21, 2026. The likely range is $962,831 to $1,071,413. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 644 Mosaic Cir, Oceanside, CA last sell?

644 Mosaic Cir, Oceanside, CA last sold on Aug 27, 2004 for $519,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 644 Mosaic Cir, Oceanside, CA?

644 Mosaic Cir, Oceanside, CA has 4 bedrooms, 2.5 bathrooms, 1,957 square feet of living space and a 0.96-acre lot.

When was 644 Mosaic Cir, Oceanside, CA built?

644 Mosaic Cir, Oceanside, CA was built in 1992, making it 34 years old.

What schools serve 644 Mosaic Cir, Oceanside, CA?

644 Mosaic Cir, Oceanside, CA is assigned to Alamosa Park Elementary School (elementary), rated A-; Roosevelt Middle School (middle), rated C-; Vista High School (high), rated C. All sit in Vista Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 644 Mosaic Cir, Oceanside, CA compare to other homes in Oceanside 92057?

Among the 18,275 homes in Oceanside 92057, it is worth more than 78% of them ($1,017,122 against a typical $780,459), its price per square foot is higher than 65% of them ($520 against a typical $490), it is bigger than 69% of them (1,957 ft² against a typical 1,506 ft²), its lot is bigger than almost none of them (4,179 ft² against a typical 0.26 ac) and it is newer than 64% of them (1992 against a typical 1988). Measured against all of San Diego County, it is worth more than 61% 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 644 Mosaic Cir, Oceanside, CA?

The 2025 property tax bill for 644 Mosaic Cir, Oceanside, CA was $8,138. The county assessed it at $737,845.

More homes on Mosaic Cir

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Assigned schools

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