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CondominiumResidential

42 Beach St

BOSTON, MA 02111
760 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 189920 units566–885 ft²
$12M
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.
$634K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$817
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-17.3%vs the Boston ZIP median sale $/ft² ($988)

Sales Performance

—
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
0
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
0.0%
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.
+4.8%per yeartypical hold 3.3 yrsfrom 7 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
20092011201320172018202120232025
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
20092011201320172018202120232025

21 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.
$454K$588K$722K$855K566 ft²630 ft²693 ft²757 ft²820 ft²884 ft²
1 bd
1 bed
20 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 · 1.5 ba · 685 ft²
4 units
1 bd · 1.5 ba · 852 ft²
3 units
1 bd · 1.5 ba · 759 ft²
2 units
One-off layouts
11 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.

$454K–$462K
2 units
$540K–$540K
1 unit
$575K–$577K
2 units
$606K–$634K
5 units
$656K–$700K
6 units
$706K–$716K
2 units
$855K–$855K
1 unit

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.35%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.20%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.10.6 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.75%
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.33%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$580,006
Median tax billThe middle annual property tax bill among the building's units.$6,462
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 8DJun 24, 2025$849,000Unit 7BJun 20, 2025$695,000Unit 9ASep 16, 2024$569,000Unit 9CMar 28, 2024$619,000Unit 8COct 18, 2023$595,000Unit 3DAug 17, 2023$550,000Unit 10CApr 11, 2023$625,000Unit 8DFeb 18, 2022$699,000Unit 4AFeb 19, 2021$276,181Unit 3AMar 19, 2019$390,000

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

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.37 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.71%
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.minimal

Scores 0–100; higher = greater projected risk.

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.2007
Lot (acres)The size of the land the home sits on, from county records.0.02
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
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.

M
Quincy Upper SchoolD
Middle · Grades 6–12 · 0.3 mi
E
Josiah Quincy Elementary SchoolB
Elementary · Grades PK–5 · 0.3 mi

District: Boston School District

Neighborhood · ZIP 02111These 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.157
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.104
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.78

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.86%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.22%
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.10,326
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.27,210 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$82,381
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$110,947
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.

42 Beach St # 3a
1 bd · 1.5 ba · 566 ft²
$454K
42 Beach St # 3b
1 bd · 1.5 ba · 852 ft²
$677K
42 Beach St # 3c
1 bd · 1.5 ba · 757 ft²
$620K
42 Beach St # 3d
1 bd · 1.5 ba · 884 ft²
$634K
42 Beach St # 4a
1 bd · 1.5 ba · 685 ft²
$462K
42 Beach St # 7b
1 bd · 1.5 ba · 852 ft²
$700K
42 Beach St # 7c
1 bd · 1.5 ba · 759 ft²
$540K
42 Beach St Unit 7d
1 bd · 2 ba · 885 ft²
42 Beach St # 8a
1 bd · 1.5 ba · 685 ft²
$577K
42 Beach St # 8b
1 bd · 1.5 ba · 852 ft²
$706K
42 Beach St # 8c
1 bd · 1.5 ba · 759 ft²
$606K
42 Beach St # 8d
1 bd · 1.5 ba · 876 ft²
$855K
42 Beach St # 9a
1 bd · 1.5 ba · 685 ft²
$575K
42 Beach St # 9b
1 bd · 1.5 ba · 855 ft²
$687K
42 Beach St # 9c
1 bd · 1.5 ba · 758 ft²
$632K
42 Beach St # 9d
1 bd · 1.5 ba · 877 ft²
$716K
42 Beach St # 10a
1 bd · 1.5 ba · 685 ft²
$624K
42 Beach St # 10b
1 bd · 1.5 ba · 853 ft²
$656K
42 Beach St # 10c
1 bd · 1.5 ba · 760 ft²
$696K
42 Beach St # 10d
1 bd · 2.5 ba · 876 ft²
$670K

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

About 42 Beach St

How many units are in 42 Beach St, Boston, MA?

42 Beach St, Boston, MA has 20 residential units across built in 1899, according to county assessor records.

What is a unit at 42 Beach St, Boston, MA worth?

The median TopHap Estimate across the 20 units at 42 Beach St, Boston, MA is $634,097. That works out to $817 per square foot. Units run from 566 to 885 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 42 Beach St, Boston, MA expensive for Boston?

Units at 42 Beach St, Boston, MA carry a median of $817 per square foot, 17% below the Boston median of $988 per square foot.

How often do units sell at 42 Beach St, Boston, MA?

0 units at 42 Beach St, Boston, MA sold in the last 12 months, out of 21 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

Have units at 42 Beach St, Boston, MA appreciated?

Across 7 repeat sales of the same unit, 42 Beach St, Boston, MA returned a median 4.8% 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 3.3 years.

What floor plans does 42 Beach St, Boston, MA have?

The most common plan at 42 Beach St, Boston, MA is a 1-bedroom of 685 square feet, repeated 4 times, with a median estimate of $576,011. TopHap identifies 3 recurring plans in the building.

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