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Single Family ResidenceResidential
$1,436,163$609 / 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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026
Last sold for $510,000 on Mar 5, 2010

840 SW 21ST ST

BOCA RATON, FL 33486
4
Beds
3 / 1
Baths
2,358 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.
1986
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$1.4M
$1.3M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$510,000 · Mar 5, 2010

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,573 (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.$347,585 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$337,789
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$940,706

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.12 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.0.2 percent flood zone

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
CountyPalm Beach
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.1991
Lot (acres)The size of the land the home sits on, from county records.0.23
ConstructionThe main material the home's frame and walls are built from.Concrete Blocks
RoofThe main material covering the roof, such as asphalt shingle or tile.Bermuda
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.Yes
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Patio · 300 ft²Porch · 564 ft²

Transaction History(1)

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
Addison Mizner SchoolA+
Elementary · Grades KG–8 · 1.4 mi
H
Boca Raton Community High SchoolB-
High · Grades 9–12 · 2.6 mi

District: Palm Beach County School District

Neighborhood · ZIP 33486These 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.58
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.78
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.16

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.38%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.23,397
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,308 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$111,538
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$143,548
Average tempThe average temperature here across a full year.76°F
Annual precipHow much rain and melted snow falls here in a typical year.60 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.66%

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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

840 Sw 21st 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 more than 91% of homes in Palm Beach County
  • Costs more per square foot than 91% of homes in Palm Beach County
  • Bigger than 80% of homes in Boca Raton 33486
  • Newer than 81% of homes in Boca Raton 33486

What homes are worth in Boca Raton 33486

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

This home
$174K$2.6M

This home is worth more than 85% of homes in Boca Raton 33486.

How it measures up in Boca Raton 33486

The dot is this home. The mark in the middle is the typical home in Boca Raton 33486.

Estimated value$1,436,163
CheaperTypical $814,078Pricier

Pricier than 85% of homes nearby

Price per ft²$609
CheaperTypical $454Pricier

Pricier than 79% of homes nearby

Living area2,358 ft²
SmallerTypical 1,742 ft²Bigger

Bigger than 80% of homes nearby

Lot size0.23 ac
SmallerTypical 0.23 acBigger

Bigger than 56% of homes nearby

Year built1986
OlderTypical 1973Newer

Newer than 81% of homes nearby

How 840 Sw 21st St ranks against every home in each area.
MeasureThis homePalm Beach FarmsBoca Raton 33486Palm Beach County
Estimated valuepricier than$1,436,16344% of homes85% of homes91% of homes
Price per ft²pricier than$60936% of homes79% of homes91% of homes
Living areabigger than2,358 ft²51% of homes80% of homes80% of homes
Lot sizebigger than0.23 ac54% of homes56% of homes54% of homes
Year builtnewer than198680% of homes81% of homes53% of homes

About 840 Sw 21st St

How much is 840 Sw 21st St, Boca Raton, FL worth?

The TopHap Estimate for 840 Sw 21st St, Boca Raton, FL is $1,436,163 as of Aug 30, 2026. The likely range is $1,323,566 to $1,548,760. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 840 Sw 21st St, Boca Raton, FL last sell?

840 Sw 21st St, Boca Raton, FL last sold on Mar 5, 2010 for $510,000, according to the county's recorded deed.

How big is 840 Sw 21st St, Boca Raton, FL?

840 Sw 21st St, Boca Raton, FL has 4 bedrooms, 3 bathrooms, 2,358 square feet of living space and a 0.23-acre lot.

When was 840 Sw 21st St, Boca Raton, FL built?

840 Sw 21st St, Boca Raton, FL was built in 1986, making it 40 years old. The building has 1 story.

What schools serve 840 Sw 21st St, Boca Raton, FL?

840 Sw 21st St, Boca Raton, FL is assigned to Addison Mizner School (elementary), rated A+; Boca Raton Community High School (high), rated B-. All sit in Palm Beach County School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 840 Sw 21st St, Boca Raton, FL compare to other homes in Boca Raton 33486?

Among the 8,495 homes in Boca Raton 33486, it is worth more than 85% of them ($1,436,163 against a typical $814,078), its price per square foot is higher than 79% of them ($609 against a typical $454), it is bigger than 80% of them (2,358 ft² against a typical 1,742 ft²), its lot is bigger than 56% of them (0.23 ac against a typical 0.23 ac) and it is newer than 81% of them (1986 against a typical 1973). Measured against all of Palm Beach 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 840 Sw 21st St, Boca Raton, FL?

The 2025 property tax bill for 840 Sw 21st St, Boca Raton, FL was $5,573. The county assessed it at $347,585.

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Assigned schools

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