Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential

18 River St

HUDSON, MA 01749
0.54 ac
Lot SizeThe size of the land the home sits on, from county records.
1984
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
Built 198414 units525–825 ft²
$3.9M
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.
$311K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$409
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+21.7%vs the Hudson ZIP median sale $/ft² ($336)

Sales Performance

$252K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
—
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
2
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
14.3%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+4.5%per yeartypical hold 5.6 yrsfrom 39 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871994200020042008201220182025
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871994200020042008201220182025

53 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.
$204K$246K$287K$328K525 ft²585 ft²645 ft²705 ft²765 ft²825 ft²
1 bd2 bd
1 bed
6 units
2 bed
8 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 · 525 ft²
6 units
2 bd · 1.5 ba · 775 ft²
4 units
2 bd · 1.5 ba · 825 ft²
4 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.

$204K–$218K
2 units
$221K–$230K
4 units
$311K–$312K
3 units
$313K–$328K
5 units

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.7%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.14%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.7.7 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.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.30%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$310,215
Median tax billThe middle annual property tax bill among the building's units.$3,929
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 1Dec 11, 2025$200,000Unit 13Oct 22, 2025$304,000Unit 13Aug 16, 2023$315,000Unit 24Apr 7, 2023$300,000Unit 24Aug 24, 2020$124,900Unit 24Sep 3, 2019$185,000Unit 24May 31, 2019$175,000Unit 24Sep 26, 2018$174,000Unit 24Jul 18, 2018$175,000Unit 24Jul 13, 2017$170,000

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

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.55
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Baseboard
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
C a FarleyB-
Elementary · Grades PK–4 · 0.6 mi
M
David J. Quinn Middle SchoolC
Middle · Grades 5–7 · 0.9 mi
H
Hudson High SchoolC
High · Grades 8–12 · 0.9 mi

District: Hudson School District

Neighborhood · ZIP 01749These 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.102
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 100.65

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.96%
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.5.8%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.20,357
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,766 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$107,752
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$128,047
Average tempThe average temperature here across a full year.48°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.

18 River St
1 bd · 1 ba · 525 ft²
$204K
18 River St # 5
1 bd · 1 ba · 525 ft²
$229K
18 River St # 13
2 bd · 1.5 ba · 775 ft²
$312K
18 River St # 24
2 bd · 1.5 ba · 825 ft²
$311K
18 River St # 24
2 bd · 1.5 ba · 825 ft²
$314K
18 River St # 24
1 bd · 1 ba · 525 ft²
$218K
18 River St # 24
2 bd · 1.5 ba · 825 ft²
$319K
18 River St # 24
2 bd · 1.5 ba · 775 ft²
$328K
18 River St # 24
2 bd · 1.5 ba · 775 ft²
$324K
18 River St # 24
1 bd · 1 ba · 525 ft²
$221K
18 River St # 24
2 bd · 1.5 ba · 825 ft²
$313K
18 River St # 24
2 bd · 1.5 ba · 775 ft²
$312K
18 River St # 24
1 bd · 1 ba · 525 ft²
$224K
18 River St # 24
1 bd · 1 ba · 525 ft²
$230K

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

About 18 River St

How many units are in 18 River St, Hudson, MA?

18 River St, Hudson, MA has 14 residential units across built in 1984, according to county assessor records.

What is a unit at 18 River St, Hudson, MA worth?

The median TopHap Estimate across the 14 units at 18 River St, Hudson, MA is $311,211. That works out to $409 per square foot. Units run from 525 to 825 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 18 River St, Hudson, MA expensive for Hudson?

Units at 18 River St, Hudson, MA carry a median of $409 per square foot, 22% above the Hudson median of $336 per square foot.

How often do units sell at 18 River St, Hudson, MA?

2 units at 18 River St, Hudson, MA sold in the last 12 months, out of 53 recorded arms-length sales all time. That is a turnover rate of 14.3% of the building per year. The median sale over that period was $252K.

Have units at 18 River St, Hudson, MA appreciated?

Across 39 repeat sales of the same unit, 18 River St, Hudson, MA returned a median 4.5% 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 5.6 years.

What floor plans does 18 River St, Hudson, MA have?

The most common plan at 18 River St, Hudson, MA is a 1-bedroom of 525 square feet, repeated 6 times, with a median estimate of $222,523. TopHap identifies 3 recurring plans in the building.

More homes on River St

Closest homes

More homes in Hudson 01749

Assigned schools

Explore the area

See this home in context

Open 18 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