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CondominiumResidential

21 Beacon St

BOSTON, MA 02108
325 ft²
Lot SizeThe size of the land the home sits on, from county records.
1899
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 1899155 units262–929 ft²
$90M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$602K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$1241
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-2.4%vs the Boston ZIP median sale $/ft² ($1272)

Sales Performance

$562K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
-14.7%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
4
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
2.6%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+7.2%per yeartypical hold 6.2 yrsfrom 209 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871992199820032009201420212026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871992199820032009201420212026

360 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

Every unit: size vs estimated valueEvery unit in the building as one dot: across is its size, up is our current value estimate, and color is its bedroom count. Vertical columns of dots are recurring floor plans; the height spread within a column shows how much floor, view and condition move prices for the same layout.
$201K$507K$814K$1.1M262 ft²395 ft²529 ft²662 ft²796 ft²929 ft²
Studio1 bd2 bd
Studio
13 units
1 bed
135 units
2 bed
7 units
Recurring floor plansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.
1 bd · 1 ba · 438 ft²
10 units
1 bd · 1 ba · 600 ft²
10 units
1 bd · 1 ba · 290 ft²
9 units
1 bd · 1 ba · 325 ft²
9 units
1 bd · 1 ba · 409 ft²
9 units
1 bd · 1 ba · 426 ft²
9 units
1 bd · 1 ba · 459 ft²
9 units
1 bd · 1 ba · 514 ft²
9 units
1 bd · 1 ba · 563 ft²
9 units
Studio · 1 ba · 262 ft²
8 units
1 bd · 1 ba · 427 ft²
8 units
1 bd · 1 ba · 535 ft²
7 units
1 bd · 1 ba · 574 ft²
7 units
1 bd · 1 ba · 588 ft²
7 units
One-off layouts
35 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$201K–$258K
2 units
$321K–$410K
9 units
$434K–$542K
33 units
$547K–$660K
70 units
$661K–$763K
28 units
$893K–$984K
5 units
$1M–$1.1M
3 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.11%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.29%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.16.0 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.41%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.25%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$609,115
Median tax billThe middle annual property tax bill among the building's units.$5,976
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 5IMar 31, 2026$583,000Unit 6KFeb 12, 2026$450,000Unit 4SDec 23, 2025$540,000Unit 7EOct 30, 2025$715,000Unit 4IJun 26, 2025$800,000Unit 7RMay 9, 2025$608,000Unit 10EMar 18, 2025$660,000Unit 2FFeb 28, 2025$575,000Unit 5TJan 13, 2025$658,500Unit 2FSep 9, 2024$307,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountySUFFOLK
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.1996
Lot (acres)The size of the land the home sits on, from county records.0.01
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Eliot K-8 SchoolA-
Elementary · Grades PK–8 · 0.7 mi
H
Boston Adult Technical Academy
High · Grades 9–12 · 0.7 mi

District: Boston School District

Neighborhood · ZIP 02108These 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.161
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.106
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.75

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.84%
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.1.6%
PopulationHow many people live in this area.4,496
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.33,417 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$154,589
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$241,580
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.46 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

21 Beacon St # 2a
1 bd · 1 ba · 600 ft²
$638K
21 Beacon St # 2b
1 bd · 1 ba · 438 ft²
$598K
21 Beacon St # 2d
1 bd · 1 ba · 290 ft²
$321K
21 Beacon St # 2e
1 bd · 1 ba · 772 ft²
$685K
21 Beacon St # 2f
1 bd · 1 ba · 427 ft²
$541K
21 Beacon St # 2g
1 bd · 1 ba · 535 ft²
$660K
21 Beacon St # 2h
2 bd · 2 ba · 929 ft²
$893K
21 Beacon St # 2i
1 bd · 1 ba · 574 ft²
$637K
21 Beacon St # 2j
1 bd · 1 ba · 588 ft²
$563K
21 Beacon St # 2t
1 bd · 1 ba · 591 ft²
$631K
21 Beacon St # 3a
1 bd · 1 ba · 600 ft²
$715K
21 Beacon St # 3b
1 bd · 1 ba · 438 ft²
$549K
21 Beacon St # 3c
1 bd · 1 ba · 459 ft²
$548K
21 Beacon St # 3d
1 bd · 1 ba · 290 ft²
$400K
21 Beacon St # 3e
1 bd · 1 ba · 514 ft²
21 Beacon St # 3f
1 bd · 1 ba · 427 ft²
$552K
21 Beacon St # 3g
1 bd · 1 ba · 535 ft²
$555K
21 Beacon St # 3h
2 bd · 2 ba · 929 ft²
$725K
21 Beacon St # 3i
1 bd · 1 ba · 574 ft²
$722K
21 Beacon St # 3j
1 bd · 1 ba · 588 ft²
$635K
21 Beacon St # 3k
1 ba · 262 ft²
$410K
21 Beacon St # 3l
1 bd · 1 ba · 325 ft²
$528K
21 Beacon St # 3m
1 bd · 1 ba · 409 ft²
$566K
21 Beacon St # 3n
1 bd · 1 ba · 563 ft²
$675K
21 Beacon St # 3p
1 bd · 1 ba · 426 ft²
$540K
21 Beacon St # 3q
1 ba · 330 ft²
$404K
21 Beacon St # 3r
1 bd · 1 ba · 560 ft²
$668K
21 Beacon St # 3s
1 bd · 1 ba · 508 ft²
$614K
21 Beacon St # 3t
1 bd · 1 ba · 591 ft²
$633K
21 Beacon St # 4a
1 bd · 1 ba · 600 ft²
$667K
21 Beacon St # 4b
1 bd · 1 ba · 438 ft²
$603K
21 Beacon St # 4c
1 bd · 1 ba · 459 ft²
$569K
21 Beacon St # 4d
1 bd · 1 ba · 290 ft²
$393K
21 Beacon St # 4e
1 bd · 1 ba · 514 ft²
$619K
21 Beacon St # 4f
1 bd · 1 ba · 427 ft²
$626K
21 Beacon St # 4g
1 bd · 1 ba · 535 ft²
$605K
21 Beacon St # 4h
2 bd · 2 ba · 929 ft²
$1.1M
21 Beacon St # 4i
1 bd · 1 ba · 574 ft²
$762K
21 Beacon St # 4j
1 bd · 1 ba · 588 ft²
$618K
21 Beacon St # 4k
1 ba · 262 ft²
$576K
21 Beacon St # 4l
1 bd · 1 ba · 325 ft²
$516K
21 Beacon St # 4m
1 bd · 1 ba · 409 ft²
$456K
21 Beacon St # 4n
1 bd · 1 ba · 563 ft²
$641K
21 Beacon St # 4p
1 bd · 1 ba · 426 ft²
$510K
21 Beacon St # 4q
1 ba · 330 ft²
$542K
21 Beacon St # 4r
1 bd · 1 ba · 560 ft²
$674K
21 Beacon St # 4s
1 bd · 1 ba · 508 ft²
$524K
21 Beacon St # 4t
1 bd · 1 ba · 591 ft²
$636K
21 Beacon St # 5a
1 bd · 1 ba · 600 ft²
$745K
21 Beacon St # 5b
1 bd · 1 ba · 438 ft²
$581K
21 Beacon St # 5c
1 bd · 1 ba · 459 ft²
$583K
21 Beacon St # 5d
1 bd · 1 ba · 290 ft²
$450K
21 Beacon St # 5e
1 bd · 1 ba · 514 ft²
$603K
21 Beacon St # 5f
1 bd · 1 ba · 427 ft²
$589K
21 Beacon St # 5g
1 bd · 1 ba · 535 ft²
$653K
21 Beacon St # 5h
2 bd · 2 ba · 929 ft²
$964K
21 Beacon St # 5i
1 bd · 1 ba · 574 ft²
$571K
21 Beacon St # 5j
1 bd · 1 ba · 588 ft²
$651K
21 Beacon St # 5k
1 ba · 262 ft²
$434K
21 Beacon St # 5l
1 bd · 1 ba · 325 ft²
$490K
21 Beacon St # 5m
1 bd · 1 ba · 409 ft²
$525K
21 Beacon St # 5n
1 bd · 1 ba · 563 ft²
$669K
21 Beacon St # 5p
1 bd · 1 ba · 426 ft²
$534K
21 Beacon St # 5q
1 ba · 330 ft²
$441K
21 Beacon St # 5r
1 bd · 1 ba · 560 ft²
$601K
21 Beacon St # 5s
1 bd · 1 ba · 508 ft²
$624K
21 Beacon St # 5t
1 bd · 1 ba · 591 ft²
$618K
21 Beacon St # 6a
1 bd · 1 ba · 600 ft²
$638K
21 Beacon St # 6b
1 bd · 1 ba · 438 ft²
$580K
21 Beacon St # 6c
1 bd · 1 ba · 459 ft²
$623K
21 Beacon St # 6d
1 bd · 1 ba · 290 ft²
$450K
21 Beacon St # 6e
1 bd · 1 ba · 514 ft²
21 Beacon St # 6f
1 bd · 1 ba · 427 ft²
21 Beacon St # 6g
1 bd · 1 ba · 535 ft²
$652K
21 Beacon St # 6h
2 bd · 2 ba · 929 ft²
$1.1M
21 Beacon St # 6i
1 bd · 1 ba · 574 ft²
$600K
21 Beacon St # 6j
1 bd · 1 ba · 588 ft²
$640K
21 Beacon St # 6k
1 bd · 1 ba · 262 ft²
$440K
21 Beacon St # 6l
1 bd · 1 ba · 325 ft²
$522K
21 Beacon St # 6m
1 bd · 1 ba · 409 ft²
$604K
21 Beacon St # 6n
1 bd · 1 ba · 563 ft²
$720K
21 Beacon St # 6p
1 bd · 1 ba · 426 ft²
$592K
21 Beacon St # 6q
1 ba · 330 ft²
$472K
21 Beacon St # 6r
1 bd · 1 ba · 560 ft²
$718K
21 Beacon St # 6s
1 bd · 1 ba · 508 ft²
$628K
21 Beacon St # 6t
1 bd · 1 ba · 591 ft²
$668K
21 Beacon St # 7a
1 bd · 1 ba · 600 ft²
$672K
21 Beacon St # 7b
1 bd · 1 ba · 438 ft²
$582K
21 Beacon St # 7c
1 bd · 1 ba · 459 ft²
$577K
21 Beacon St # 7d
1 bd · 1 ba · 290 ft²
$409K
21 Beacon St # 7e
1 bd · 1 ba · 514 ft²
$689K
21 Beacon St # 7f
1 bd · 1 ba · 427 ft²
$201K
21 Beacon St # 7g
1 bd · 1 ba · 535 ft²
$606K
21 Beacon St # 7h
2 bd · 2 ba · 929 ft²
$956K
21 Beacon St # 7i
1 bd · 1 ba · 574 ft²
$763K
21 Beacon St # 7j
1 bd · 1 ba · 588 ft²
$713K
21 Beacon St # 7k
1 ba · 262 ft²
$441K
21 Beacon St # 7l
1 bd · 1 ba · 325 ft²
21 Beacon St # 7m
1 bd · 1 ba · 409 ft²
$521K
21 Beacon St # 7n
1 bd · 1 ba · 563 ft²
$641K
21 Beacon St # 7p
1 bd · 1 ba · 426 ft²
$360K
21 Beacon St # 7q
1 ba · 330 ft²
$439K
21 Beacon St # 7r
1 bd · 1 ba · 560 ft²
$577K
21 Beacon St # 7s
1 bd · 1 ba · 508 ft²
$661K
21 Beacon St # 7t
1 bd · 1 ba · 591 ft²
21 Beacon St # 8a
1 bd · 1 ba · 600 ft²
$666K
21 Beacon St # 8b
1 bd · 1 ba · 438 ft²
$646K
21 Beacon St # 8c
1 bd · 1 ba · 459 ft²
$634K
21 Beacon St # 8d
1 bd · 1 ba · 290 ft²
$406K
21 Beacon St # 8e
1 bd · 1 ba · 514 ft²
$688K
21 Beacon St # 8f
1 bd · 1 ba · 427 ft²
$601K
21 Beacon St # 8g
1 bd · 1 ba · 535 ft²
$655K
21 Beacon St Apt 8h
2 bd · 2 ba · 929 ft²
$984K
21 Beacon St # 8i
1 bd · 1 ba · 574 ft²
$710K
21 Beacon St # 8j
1 bd · 1 ba · 588 ft²
$738K
21 Beacon St # 8k
1 ba · 262 ft²
$461K
21 Beacon St # 8l
1 bd · 1 ba · 325 ft²
$486K
21 Beacon St # 8m
1 bd · 1 ba · 409 ft²
$539K
21 Beacon St # 8n
1 bd · 1 ba · 563 ft²
$738K
21 Beacon St # 8p
1 bd · 1 ba · 426 ft²
$574K
21 Beacon St # 8t
1 bd · 1 ba · 591 ft²
$691K
21 Beacon St # 9a
1 bd · 1 ba · 600 ft²
$658K
21 Beacon St # 9b
1 bd · 1 ba · 438 ft²
$518K
21 Beacon St # 9c
1 bd · 1 ba · 459 ft²
$599K
21 Beacon St # 9d
1 bd · 1 ba · 290 ft²
$502K
21 Beacon St # 9e
1 bd · 1 ba · 514 ft²
$657K
21 Beacon St # 9f
1 bd · 1 ba · 427 ft²
$522K
21 Beacon St # 9g
1 bd · 1 ba · 665 ft²
$687K
21 Beacon St # 9h
1 bd · 1 ba · 609 ft²
$651K
21 Beacon St # 9i
1 bd · 2 ba · 861 ft²
$1M
21 Beacon St # 9j
1 bd · 2 ba · 861 ft²
$953K
21 Beacon St # 9k
1 ba · 262 ft²
$445K
21 Beacon St # 9l
1 bd · 1 ba · 325 ft²
$526K
21 Beacon St # 9m
1 bd · 1 ba · 409 ft²
$563K
21 Beacon St # 9n
1 bd · 1 ba · 563 ft²
$637K
21 Beacon St # 9p
1 bd · 1 ba · 426 ft²
$547K
21 Beacon St # 10a
1 bd · 1 ba · 600 ft²
$684K
21 Beacon St # 10b
1 bd · 1 ba · 438 ft²
$585K
21 Beacon St # 10c
1 bd · 1 ba · 459 ft²
$626K
21 Beacon St # 10e
1 bd · 1 ba · 514 ft²
$623K
21 Beacon St # 10k
1 ba · 262 ft²
$576K
21 Beacon St # 10l
1 bd · 1 ba · 325 ft²
$515K
21 Beacon St # 10m
1 bd · 1 ba · 409 ft²
$497K
21 Beacon St # 10n
1 bd · 1 ba · 563 ft²
$655K
21 Beacon St # 10p
1 bd · 1 ba · 426 ft²
$571K
21 Beacon St # 11a
1 bd · 1 ba · 600 ft²
$674K
21 Beacon St # 11b
1 bd · 1 ba · 438 ft²
$567K
21 Beacon St # 11c
1 bd · 1 ba · 459 ft²
$258K
21 Beacon St # 11d
1 bd · 1 ba · 290 ft²
$457K
21 Beacon St # 11e
1 bd · 1 ba · 514 ft²
$637K
21 Beacon St # 11k
1 ba · 262 ft²
$379K
21 Beacon St # 11l
1 bd · 1 ba · 325 ft²
$508K
21 Beacon St # 11m
1 bd · 1 ba · 409 ft²
$558K
21 Beacon St # 11n
1 bd · 1 ba · 563 ft²
$657K
21 Beacon St # 11p
1 bd · 1 ba · 426 ft²
$597K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 21 Beacon St

How many units are in 21 Beacon St, Boston, MA?

21 Beacon St, Boston, MA has 155 residential units across built in 1899, according to county assessor records.

What is a unit at 21 Beacon St, Boston, MA worth?

The median TopHap Estimate across the 155 units at 21 Beacon St, Boston, MA is $601,909. That works out to $1241 per square foot. Units run from 262 to 929 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 21 Beacon St, Boston, MA expensive for Boston?

Units at 21 Beacon St, Boston, MA carry a median of $1241 per square foot, 2% below the Boston median of $1272 per square foot.

How often do units sell at 21 Beacon St, Boston, MA?

4 units at 21 Beacon St, Boston, MA sold in the last 12 months, out of 360 recorded arms-length sales all time. That is a turnover rate of 2.6% of the building per year. The median sale over that period was $562K.

Have units at 21 Beacon St, Boston, MA appreciated?

Across 209 repeat sales of the same unit, 21 Beacon St, Boston, MA returned a median 7.2% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 6.2 years.

What floor plans does 21 Beacon St, Boston, MA have?

The most common plan at 21 Beacon St, Boston, MA is a 1-bedroom of 438 square feet, repeated 10 times, with a median estimate of $581,613. TopHap identifies 14 recurring plans in the building.

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