Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential

15 River St

BOSTON, MA 02108
2,047 ft²
Lot SizeThe size of the land the home sits on, from county records.
1900
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.
Built 19009 floors46 units502–2,047 ft²
$44M
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.
$841K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$1360
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-14.2%vs the Boston ZIP median sale $/ft² ($1584)

Sales Performance

$987K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+10.4%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
2
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
4.3%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+3.1%per yeartypical hold 5.4 yrsfrom 52 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20052008201120142017202020232026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20052008201120142017202020232026

98 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.
$598K$1.5M$2.4M$3.2M502 ft²811 ft²1,120 ft²1,429 ft²1,738 ft²2,047 ft²
1 bd2 bd
1 bed
24 units
2 bed
22 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 · 505 ft²
6 units
2 bd · 1 ba · 778 ft²
6 units
2 bd · 1 ba · 841 ft²
6 units
1 bd · 1 ba · 502 ft²
5 units
1 bd · 1 ba · 519 ft²
5 units
2 bd · 1 ba · 797 ft²
5 units
1 bd · 1 ba · 721 ft²
3 units
One-off layouts
10 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.

$598K–$862K
28 units
$978K–$1.2M
14 units
$1.7M–$1.8M
3 units
$3.2M–$3.2M
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 2
$1339/ft²
Floors 3–4
$1376/ft²
Floors 5–6
$1315/ft²
Floors 7–8
$1297/ft²
Floor 9
$1800/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 ·02
$1574/ft²
Line ·06
$1358/ft²
Line ·04
$1358/ft²
Line ·01
$1334/ft²
Line ·05
$1290/ft²
Line ·03
$1274/ft²
Line ·07
$1158/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.9%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.24%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.10.7 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.46%
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.32%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$826,125
Median tax billThe middle annual property tax bill among the building's units.$9,709
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 507May 15, 2026$775,000Unit 704Apr 9, 2026$1,199,000Unit 306Jul 11, 2025$735,000Unit 602Jul 7, 2025$1,017,500Unit 803Apr 1, 2025$775,000Unit 401Jan 29, 2025$1,012,500Unit 803Mar 20, 2024$770,000Unit 806Jun 30, 2023$720,000Unit 803Oct 12, 2022$700,000Unit 604Sep 23, 2022$1,150,000

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.24 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.2020
Lot (acres)The size of the land the home sits on, from county records.0.05
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.

H
Boston Adult Technical Academy
High · Grades 9–12 · 0.6 mi
E
Josiah Quincy Elementary SchoolB
Elementary · Grades PK–5 · 0.7 mi
M
Quincy Upper SchoolD
Middle · Grades 6–12 · 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.

15 River St # 201
2 bd · 1.5 ba · 2,047 ft²
$3.2M
15 River St # 203
1 bd · 1 ba · 571 ft²
$742K
15 River St # 204
1 bd · 1 ba · 631 ft²
$778K
15 River St # 205
1 bd · 1 ba · 589 ft²
$829K
15 River St # 206
1 bd · 1 ba · 512 ft²
$599K
15 River St # 301
2 bd · 1 ba · 778 ft²
$862K
15 River St # 302
1 bd · 1 ba · 797 ft²
$1.8M
15 River St # 303
1 bd · 1 ba · 505 ft²
$599K
15 River St # 304
2 bd · 1 ba · 841 ft²
$1.1M
15 River St # 305
1 bd · 1 ba · 502 ft²
$598K
15 River St # 306
2 bd · 1 ba · 519 ft²
$706K
15 River St # 307
1 bd · 1 ba · 721 ft²
$853K
15 River St # 401
2 bd · 1 ba · 778 ft²
$1.1M
15 River St # 402
2 bd · 1 ba · 797 ft²
$1.1M
15 River St # 403
1 bd · 1 ba · 505 ft²
$715K
15 River St # 404
2 bd · 1 ba · 841 ft²
$1.1M
15 River St # 405
2 bd · 1.5 ba · 502 ft²
$719K
15 River St # 406
1 bd · 1 ba · 519 ft²
$712K
15 River St # 501
2 bd · 1 ba · 778 ft²
$1.1M
15 River St # 502
2 bd · 1 ba · 797 ft²
$1.1M
15 River St # 503
1 bd · 1 ba · 505 ft²
$599K
15 River St # 504
2 bd · 1 ba · 841 ft²
$1.2M
15 River St # 505
1 bd · 1 ba · 502 ft²
$715K
15 River St # 506
1 bd · 1 ba · 519 ft²
$710K
15 River St # 507
1 bd · 1 ba · 721 ft²
$799K
15 River St # 601
2 bd · 1 ba · 778 ft²
$1.1M
15 River St # 602
2 bd · 1 ba · 797 ft²
$978K
15 River St # 603
1 bd · 1 ba · 505 ft²
$599K
15 River St # 604
2 bd · 1 ba · 841 ft²
$1.2M
15 River St # 605
1 bd · 1 ba · 502 ft²
$598K
15 River St # 606
1 bd · 1 ba · 519 ft²
$696K
15 River St # 701
2 bd · 1 ba · 778 ft²
$862K
15 River St # 702
2 bd · 1 ba · 797 ft²
$1M
15 River St # 703
1 bd · 1 ba · 505 ft²
$599K
15 River St # 704
2 bd · 1 ba · 841 ft²
$1.2M
15 River St # 705
1 bd · 1 ba · 502 ft²
$598K
15 River St # 706
1 bd · 1 ba · 519 ft²
$770K
15 River St # 707
1 bd · 1 ba · 721 ft²
$853K
15 River St # 801
2 bd · 1 ba · 778 ft²
$862K
15 River St # 802
2 bd · 1 ba · 797 ft²
$1.1M
15 River St # 803
1 bd · 1 ba · 505 ft²
$739K
15 River St # 804
2 bd · 1 ba · 841 ft²
$1.2M
15 River St # 805
1 bd · 1 ba · 502 ft²
$598K
15 River St # 806
1 bd · 1 ba · 519 ft²
$733K
15 River St Apt 901
2 bd · 3 ba · 1,166 ft²
$1.8M
15 River St # 902
2 bd · 1.5 ba · 812 ft²
$1.7M

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

About 15 River St

How many units are in 15 River St, Boston, MA?

15 River St, Boston, MA has 46 residential units across 9 floors, built in 1900, according to county assessor records.

What is a unit at 15 River St, Boston, MA worth?

The median TopHap Estimate across the 46 units at 15 River St, Boston, MA is $841,139. That works out to $1360 per square foot. Units run from 502 to 2,047 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 15 River St, Boston, MA expensive for Boston?

Units at 15 River St, Boston, MA carry a median of $1360 per square foot, 14% below the Boston median of $1584 per square foot.

How often do units sell at 15 River St, Boston, MA?

2 units at 15 River St, Boston, MA sold in the last 12 months, out of 98 recorded arms-length sales all time. That is a turnover rate of 4.3% of the building per year. The median sale over that period was $987K.

Have units at 15 River St, Boston, MA appreciated?

Across 52 repeat sales of the same unit, 15 River St, Boston, MA returned a median 3.1% 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 5.4 years.

What floor plans does 15 River St, Boston, MA have?

The most common plan at 15 River St, Boston, MA is a 1-bedroom of 505 square feet, repeated 6 times, with a median estimate of $598,500. TopHap identifies 7 recurring plans in the building.

More homes on River St

Closest homes

More homes in Boston 02108

Assigned schools

Explore the area

See this home in context

Open 15 River St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map