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CondominiumResidential

103 South St

BOSTON, MA 02111
1,914 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 189926 units1,088–2,831 ft²
$29M
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.
$918K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$732
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+45.0%vs the Boston ZIP median sale $/ft² ($505)

Sales Performance

$1M
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+33.4%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
2
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
7.7%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+6.7%per yeartypical hold 5.2 yrsfrom 37 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19972001200420082012201720212026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19972001200420082012201720212026

65 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.
$762K$1.4M$2M$2.6M1,088 ft²1,437 ft²1,785 ft²2,134 ft²2,482 ft²2,831 ft²
1 bd2 bd3 bd
1 bed
12 units
2 bed
12 units
3 bed
2 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.
2 bd · 1 ba · 1,140 ft²
2 units
3 bd · 2 ba · 2,511 ft²
2 units
One-off layouts
22 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.

$762K–$976K
15 units
$991K–$1.2M
3 units
$1.2M–$1.3M
2 units
$1.8M–$1.8M
1 unit
$1.9M–$1.9M
3 units
$2.6M–$2.6M
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.0%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.8%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.11.9 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.50%
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.51%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$901,041
Median tax billThe middle annual property tax bill among the building's units.$8,825
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 2AJul 31, 2026$1,275,000Unit 3BNov 21, 2025$820,000Unit 5DOct 16, 2024$785,000Unit 3BFeb 9, 2022$784,000Unit 2DApr 30, 2021$779,000Unit 5COct 28, 2019$1,700,000Unit 3AOct 18, 2019$1,174,500Unit 5EAug 7, 2019$1,075,000Unit 3CJun 5, 2019$800,000Unit 5CMar 20, 2019$1,750,000

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.28 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.80%
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.1997
Lot (acres)The size of the land the home sits on, from county records.0.04
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
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 · 0.4 mi
E
Josiah Quincy Elementary SchoolB
Elementary · Grades PK–5 · 0.4 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.

103 South St # 2a
1 bd · 2 ba · 2,169 ft²
$1.3M
103 South St # 2b
1 bd · 1 ba · 1,187 ft²
$991K
103 South St # 2c
1 bd · 2 ba · 1,255 ft²
$795K
103 South St # 2d
2 bd · 1 ba · 1,088 ft²
$810K
103 South St # 2e
1 bd · 1 ba · 1,133 ft²
$796K
103 South St # 2f
2 bd · 1 ba · 1,142 ft²
103 South St # 3a
2 bd · 2 ba · 1,914 ft²
$1.2M
103 South St # 3b
2 bd · 1 ba · 1,199 ft²
$823K
103 South St # 3c
2 bd · 1 ba · 1,240 ft²
$822K
103 South St # 3d
2 bd · 1 ba · 1,174 ft²
$918K
103 South St # 3e
2 bd · 1 ba · 1,170 ft²
$851K
103 South St # 3f
2 bd · 1 ba · 1,140 ft²
$828K
103 South St # 4a
1 bd · 2 ba · 1,883 ft²
$1.2M
103 South St # 4b
2 bd · 1 ba · 1,140 ft²
$844K
103 South St # 4c
3 bd · 2 ba · 2,511 ft²
$1.9M
103 South St # 4d
1 bd · 1 ba · 1,178 ft²
$762K
103 South St # 4e
2 bd · 1 ba · 1,208 ft²
$893K
103 South St # 5a
1 bd · 1 ba · 1,878 ft²
$1.1M
103 South St # 5b
1 bd · 1 ba · 1,161 ft²
$976K
103 South St # 5c
3 bd · 2 ba · 2,511 ft²
$1.9M
103 South St # 5d
1 bd · 1 ba · 1,138 ft²
$794K
103 South St # 5e
2 bd · 2 ba · 1,296 ft²
$949K
103 South St # 6a
1 bd · 2 ba · 2,151 ft²
$1.8M
103 South St # 6b
1 bd · 1 ba · 1,091 ft²
$836K
103 South St # 6c
2 bd · 2 ba · 2,831 ft²
$2.6M
103 South St # 6d
1 bd · 2 ba · 2,445 ft²
$1.9M

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

About 103 South St

How many units are in 103 South St, Boston, MA?

103 South St, Boston, MA has 26 residential units across built in 1899, according to county assessor records.

What is a unit at 103 South St, Boston, MA worth?

The median TopHap Estimate across the 26 units at 103 South St, Boston, MA is $917,751. That works out to $732 per square foot. Units run from 1,088 to 2,831 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 103 South St, Boston, MA expensive for Boston?

Units at 103 South St, Boston, MA carry a median of $732 per square foot, 45% above the Boston median of $505 per square foot.

How often do units sell at 103 South St, Boston, MA?

2 units at 103 South St, Boston, MA sold in the last 12 months, out of 65 recorded arms-length sales all time. That is a turnover rate of 7.7% of the building per year. The median sale over that period was $1M.

Have units at 103 South St, Boston, MA appreciated?

Across 37 repeat sales of the same unit, 103 South St, Boston, MA returned a median 6.7% 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 5.2 years.

What floor plans does 103 South St, Boston, MA have?

The most common plan at 103 South St, Boston, MA is a 2-bedroom of 1,140 square feet, repeated 2 times, with a median estimate of $836,087. TopHap identifies 2 recurring plans in the building.

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Assigned schools

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