Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$2,032,813$803 / 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 Sep 24, 2026
Last sold for $825,000 on May 20, 2014

644 SAND SHELL AVE

CARLSBAD, CA 92011
4
Beds
4
Baths
2,531 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.
0.11 ac
Lot SizeThe size of the land the home sits on, from county records.
2003
Year BuiltThe year the home was originally built, according to county records.

Valuation

$2M
$1.9M low$2.2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$825,000 · May 20, 2014

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,813 (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.$1,031,554 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$479,506
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$552,048
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,011,328

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.25
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
28
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
10
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.0.11
PoolWhether the property has a pool, and what kind, such as in-ground.Yes

Transaction History(7)

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
Pacific Rim Elementary SchoolA+
Elementary · Grades KG–5 · 0.7 mi
M
Aviara Oaks Middle SchoolA
Middle · Grades 6–8 · 2.1 mi
H
Carlsbad High SchoolA-
High · Grades 9–12 · 4.2 mi

District: Carlsbad Unified School District

Neighborhood · ZIP 92011These 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.77
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.264

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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.40%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.0%
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.23,048
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,154 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$149,688
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$164,758
Average tempThe average temperature here across a full year.61°F
Annual precipHow much rain and melted snow falls here in a typical year.12 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.68%

Owner Tools

Do you own this home?
Claim this home

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 Sand Shell Ave 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 91% of homes in San Diego County
  • Costs more per square foot than 84% of homes in San Diego County
  • Bigger than 96% of homes in South Beach
  • Has a smaller lot than 90% of homes in San Diego County
  • Newer than 96% of homes in South Beach

What homes are worth in Carlsbad 92011

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

This home
$742K$3.2M

This home is worth more than 71% of homes in Carlsbad 92011.

How it measures up in Carlsbad 92011

The dot is this home. The mark in the middle is the typical home in Carlsbad 92011.

Estimated value$2,032,813
CheaperTypical $1,651,430Pricier

Pricier than 71% of homes nearby

Price per ft²$803
CheaperTypical $759Pricier

Pricier than 65% of homes nearby

Living area2,531 ft²
SmallerTypical 1,670 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.11 ac
SmallerTypical 0.23 acBigger

Bigger than 32% of homes nearby

Year built2003
OlderTypical 1998Newer

Newer than 95% of homes nearby

How 644 Sand Shell Ave ranks against every home in each area.
MeasureThis homeSouth BeachCarlsbad 92011San Diego County
Estimated valuepricier than$2,032,81362% of homes71% of homes91% of homes
Price per ft²pricier than$80351% of homes65% of homes84% of homes
Living areabigger than2,531 ft²96% of homes88% of homes84% of homes
Lot sizebigger than0.11 ac80% of homes32% of homes10% of homes
Year builtnewer than200396% of homes95% of homes84% of homes

About 644 Sand Shell Ave

How much is 644 Sand Shell Ave, Carlsbad, CA worth?

The TopHap Estimate for 644 Sand Shell Ave, Carlsbad, CA is $2,032,813 as of Sep 24, 2026. The likely range is $1,908,824 to $2,156,802. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 644 Sand Shell Ave, Carlsbad, CA last sell?

644 Sand Shell Ave, Carlsbad, CA last sold on May 20, 2014 for $825,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 644 Sand Shell Ave, Carlsbad, CA?

644 Sand Shell Ave, Carlsbad, CA has 4 bedrooms, 4 bathrooms, 2,531 square feet of living space and a 0.11-acre lot.

When was 644 Sand Shell Ave, Carlsbad, CA built?

644 Sand Shell Ave, Carlsbad, CA was built in 2003, making it 23 years old.

What schools serve 644 Sand Shell Ave, Carlsbad, CA?

644 Sand Shell Ave, Carlsbad, CA is assigned to Pacific Rim Elementary School (elementary), rated A+; Aviara Oaks Middle School (middle), rated A; Carlsbad High School (high), rated A-. All sit in Carlsbad Unified School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 644 Sand Shell Ave, Carlsbad, CA compare to other homes in Carlsbad 92011?

Among the 22,674 homes in Carlsbad 92011, it is worth more than 71% of them ($2,032,813 against a typical $1,651,430), its price per square foot is higher than 65% of them ($803 against a typical $759), it is bigger than 88% of them (2,531 ft² against a typical 1,670 ft²), its lot is bigger than 32% of them (0.11 ac against a typical 0.23 ac) and it is newer than 95% of them (2003 against a typical 1998). Measured against all of San Diego County, it is worth more than 91% 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 Sand Shell Ave, Carlsbad, CA?

The 2025 property tax bill for 644 Sand Shell Ave, Carlsbad, CA was $11,813. The county assessed it at $1,031,554.

More homes on Sand Shell Ave

Closest homes

More homes in Carlsbad 92011

Assigned schools

Explore the area

See this home in context

Open 644 Sand Shell Ave on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map