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CondominiumResidential

84 Gainsborough St

BOSTON, MA 02115
789 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 18994 floors28 units470–1,518 ft²
$22M
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.
$755K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$980
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-28.8%vs the Boston ZIP median sale $/ft² ($1377)

Sales Performance

$765K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+15.0%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
3.6%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+5.9%per yeartypical hold 5.9 yrsfrom 44 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871991199720012005201220222026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871991199720012005201220222026

72 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.
$500K$773K$1M$1.3M470 ft²680 ft²889 ft²1,099 ft²1,308 ft²1,518 ft²
1 bd2 bd3 bd
1 bed
19 units
2 bed
8 units
3 bed
1 unit
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 · 634 ft²
4 units
1 bd · 1 ba · 470 ft²
3 units
1 bd · 1 ba · 666 ft²
3 units
1 bd · 1 ba · 789 ft²
3 units
2 bd · 1 ba · 805 ft²
3 units
2 bd · 1 ba · 1,006 ft²
3 units
One-off layouts
9 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.

$500K–$602K
3 units
$606K–$676K
8 units
$726K–$772K
6 units
$845K–$891K
4 units
$926K–$1M
5 units
$1M–$1M
1 unit
$1.3M–$1.3M
1 unit

Value by Floor & LineAverage estimated price per square foot by floor range, using unit numbers to infer floors. Higher floors usually price higher — the gap shows how much the view is worth here.

Floor 1
$1039/ft²
Floor 2
$981/ft²
Floor 3
$1128/ft²
Floor 4
$1024/ft²
Unit lines by $/ft²Condo units stacked vertically share a unit line — the last digits of the unit number (like 05 in 1205, 1305, 1405). Lines share a layout and exposure, so comparing estimated $/ft² by line shows which position in the building commands a premium.
Line ·01
$1328/ft²
Line ·06
$1096/ft²
Line ·05
$978/ft²
Line ·04
$968/ft²
Line ·02
$936/ft²
Line ·03
$926/ft²

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.14%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.18%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.16.3 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.71%
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.30%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$719,483
Median tax billThe middle annual property tax bill among the building's units.$7,060
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 303WMay 29, 2026$765,000Unit 4WApr 7, 2025$599,000Unit 101WMar 25, 2025$1,025,000Unit 303WDec 12, 2024$665,000Unit 105WDec 28, 2023$620,000Unit 5WOct 12, 2023$695,000Unit 203WAug 11, 2022$699,000Unit 405WOct 12, 2021$799,000Unit 406WDec 23, 2019$605,000Unit 404WJun 5, 2019$850,000

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.48 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.1985
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
Carter Developmental Center
Middle · Grades 6–12 · 0.3 mi
E
Joseph J. Hurley K-8 SchoolC+
Elementary · Grades PK–8 · 0.6 mi

District: Boston School District

Neighborhood · ZIP 02115These 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.110
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.103
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.79

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.21%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.32,960
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.43,192 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$59,808
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$97,096
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.47 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.

84 Gainsborough St # 4w
1 bd · 1 ba · 558 ft²
$606K
84 Gainsborough St # 5w
2 bd · 1 ba · 829 ft²
$734K
84 Gainsborough St # 6w
1 bd · 1 ba · 630 ft²
$891K
84 Gainsborough St # 101w
2 bd · 1.5 ba · 918 ft²
$1M
84 Gainsborough St # 102w
1 bd · 1.5 ba · 1,035 ft²
$872K
84 Gainsborough St # 103w
3 bd · 2 ba · 1,518 ft²
$1.3M
84 Gainsborough St # 104w
1 bd · 1 ba · 618 ft²
$611K
84 Gainsborough St # 105w
1 bd · 1 ba · 685 ft²
$650K
84 Gainsborough St # 106w
1 bd · 1 ba · 634 ft²
$856K
84 Gainsborough St # 107w
1 bd · 1 ba · 821 ft²
$939K
84 Gainsborough St # 201w
1 bd · 1 ba · 470 ft²
$500K
84 Gainsborough St # 202w
1 bd · 1 ba · 666 ft²
$636K
84 Gainsborough St # 203w
1 bd · 1 ba · 789 ft²
$726K
84 Gainsborough St # 204w
2 bd · 1 ba · 1,006 ft²
$971K
84 Gainsborough St # 205w
2 bd · 1 ba · 805 ft²
$772K
84 Gainsborough St # 206w
1 bd · 1 ba · 634 ft²
$646K
84 Gainsborough St # 301w
1 bd · 1 ba · 470 ft²
$951K
84 Gainsborough St # 302w
1 bd · 1 ba · 666 ft²
$635K
84 Gainsborough St # 303w
1 bd · 1 ba · 789 ft²
$766K
84 Gainsborough St # 304w
2 bd · 1 ba · 1,006 ft²
$926K
84 Gainsborough St # 305w
2 bd · 1 ba · 805 ft²
$767K
84 Gainsborough St # 306w
1 bd · 1 ba · 634 ft²
$602K
84 Gainsborough St # 401w
1 bd · 1 ba · 470 ft²
$514K
84 Gainsborough St # 402w
1 bd · 1 ba · 666 ft²
$662K
84 Gainsborough St # 403w
1 bd · 1 ba · 789 ft²
$745K
84 Gainsborough St # 404w
2 bd · 1 ba · 1,006 ft²
$1M
84 Gainsborough St # 405w
2 bd · 1 ba · 805 ft²
$845K
84 Gainsborough St # 406w
1 bd · 1 ba · 634 ft²
$676K

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

About 84 Gainsborough St

How many units are in 84 Gainsborough St, Boston, MA?

84 Gainsborough St, Boston, MA has 28 residential units across 4 floors, built in 1899, according to county assessor records.

What is a unit at 84 Gainsborough St, Boston, MA worth?

The median TopHap Estimate across the 28 units at 84 Gainsborough St, Boston, MA is $755,493. That works out to $980 per square foot. Units run from 470 to 1,518 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 84 Gainsborough St, Boston, MA expensive for Boston?

Units at 84 Gainsborough St, Boston, MA carry a median of $980 per square foot, 29% below the Boston median of $1377 per square foot.

How often do units sell at 84 Gainsborough St, Boston, MA?

1 units at 84 Gainsborough St, Boston, MA sold in the last 12 months, out of 72 recorded arms-length sales all time. That is a turnover rate of 3.6% of the building per year. The median sale over that period was $765K.

Have units at 84 Gainsborough St, Boston, MA appreciated?

Across 44 repeat sales of the same unit, 84 Gainsborough St, Boston, MA returned a median 5.9% 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 5.9 years.

What floor plans does 84 Gainsborough St, Boston, MA have?

The most common plan at 84 Gainsborough St, Boston, MA is a 1-bedroom of 634 square feet, repeated 4 times, with a median estimate of $660,883. TopHap identifies 6 recurring plans in the building.

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