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CondominiumResidential

20 Porter St

JAMAICA PLAIN, MA 02130
2,332 ft²
Lot SizeThe size of the land the home sits on, from county records.
1905
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 19053 units504–764 ft²
$1.5M
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.
$520K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$900
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+119.1%vs the Jamaica Plain ZIP median sale $/ft² ($411)

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.
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
202220242025

3 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.

1 bed
2 units
2 bed
1 unit

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–$454K
1 unit
$520K–$520K
1 unit
$530K–$530K
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.100%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.0%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.1.4 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.33%
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.26%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$488,057
Median tax billThe middle annual property tax bill among the building's units.$4,858
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 2May 23, 2025$449,000Unit 3Nov 5, 2024$520,000Unit 2Apr 14, 2022$419,000

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

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.44
39
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
1
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
60
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
88
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
32
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%

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.2018
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
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.

E
Ellis Mendell Elementary SchoolB-
Elementary · Grades PK–5 · 0.1 mi
H
Greater Egleston Community High School
High · Grades 9–12 · 0.2 mi
M
Rafael Hernandez K-8 SchoolB-
Middle · Grades PK–8 · 0.3 mi

District: Boston School District

Neighborhood · ZIP 02130These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.29%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.37,863
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.10,409 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$114,234
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$156,638
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.48 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.

20 Porter St # 1
2 bd · 1 ba · 764 ft²
$530K
20 Porter St
1 bd · 1 ba · 504 ft²
$454K
20 Porter St # 3
1 bd · 1 ba · 540 ft²
$520K

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

About 20 Porter St

How many units are in 20 Porter St, Jamaica Plain, MA?

20 Porter St, Jamaica Plain, MA has 3 residential units across built in 1905, according to county assessor records.

What is a unit at 20 Porter St, Jamaica Plain, MA worth?

The median TopHap Estimate across the 3 units at 20 Porter St, Jamaica Plain, MA is $520,000. That works out to $900 per square foot. Units run from 504 to 764 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 20 Porter St, Jamaica Plain, MA expensive for Jamaica Plain?

Units at 20 Porter St, Jamaica Plain, MA carry a median of $900 per square foot, 119% above the Jamaica Plain median of $411 per square foot.

How often do units sell at 20 Porter St, Jamaica Plain, MA?

0 units at 20 Porter St, Jamaica Plain, MA sold in the last 12 months, out of 3 recorded arms-length sales all time. That is a turnover rate of 0.0% of the building per year.

More homes on Porter St

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Assigned schools

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