Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$1,607,309$591 / 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 Aug 30, 2026
Last sold for $470,000 on Mar 1, 2004

831 SW 21ST ST

BOCA RATON, FL 33486
3 / 1
Baths
2,719 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.
1985
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.

Valuation

$1.6M
$1.5M low$1.7M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$470,000 · Mar 1, 2004

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,515 (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.$461,817 (2025)
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$448,802
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$960,975

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.10 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.1990
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.Tile
HeatingThe type of heating system in the home.Forced Air
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.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 · 792 ft²Porch · 422 ft²

Transaction History(4)

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 · 1.3 mi
H
Boca Raton Community High SchoolB-
High · Grades 9–12 · 2.5 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%

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

831 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 92% of homes in Palm Beach County
  • Costs more per square foot than 91% of homes in Palm Beach County
  • Bigger than 87% of homes in Boca Raton 33486
  • Newer than 78% 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 89% 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$1,607,309
CheaperTypical $814,078Pricier

Pricier than 89% of homes nearby

Price per ft²$591
CheaperTypical $454Pricier

Pricier than 76% of homes nearby

Living area2,719 ft²
SmallerTypical 1,742 ft²Bigger

Bigger than 87% of homes nearby

Lot size0.23 ac
SmallerTypical 0.23 acBigger

Bigger than 55% of homes nearby

Year built1985
OlderTypical 1973Newer

Newer than 78% of homes nearby

How 831 Sw 21st St ranks against every home in each area.
MeasureThis homePalm Beach FarmsBoca Raton 33486Palm Beach County
Estimated valuepricier than$1,607,30962% of homes89% of homes92% of homes
Price per ft²pricier than$59129% of homes76% of homes91% of homes
Living areabigger than2,719 ft²72% of homes87% of homes86% of homes
Lot sizebigger than0.23 ac54% of homes55% of homes54% of homes
Year builtnewer than198576% of homes78% of homes50% of homes

About 831 Sw 21st St

How much is 831 Sw 21st St, Boca Raton, FL worth?

The TopHap Estimate for 831 Sw 21st St, Boca Raton, FL is $1,607,309 as of Aug 30, 2026. The likely range is $1,498,897 to $1,715,721. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 831 Sw 21st St, Boca Raton, FL last sell?

831 Sw 21st St, Boca Raton, FL last sold on Mar 1, 2004 for $470,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 831 Sw 21st St, Boca Raton, FL?

831 Sw 21st St, Boca Raton, FL has 3 bathrooms, 2,719 square feet of living space and a 0.23-acre lot.

When was 831 Sw 21st St, Boca Raton, FL built?

831 Sw 21st St, Boca Raton, FL was built in 1985, making it 41 years old. The building has 1 story.

What schools serve 831 Sw 21st St, Boca Raton, FL?

831 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 831 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 89% of them ($1,607,309 against a typical $814,078), its price per square foot is higher than 76% of them ($591 against a typical $454), it is bigger than 87% of them (2,719 ft² against a typical 1,742 ft²), its lot is bigger than 55% of them (0.23 ac against a typical 0.23 ac) and it is newer than 78% of them (1985 against a typical 1973). Measured against all of Palm Beach County, it is worth more than 92% 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 831 Sw 21st St, Boca Raton, FL?

The 2025 property tax bill for 831 Sw 21st St, Boca Raton, FL was $7,515. The county assessed it at $461,817.

More homes on Sw 21st St

Closest homes

More homes in Boca Raton 33486

Assigned schools

Explore the area

See this home in context

Open 831 Sw 21st St 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