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CondominiumResidential
Last sold for $185,000 on Jun 4, 2021

20 KNOX ST

LAWRENCE, MA 01841
2.27 ac
Lot SizeThe size of the land the home sits on, from county records.
1987
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
Built 198743 units1,019–1,140 ft²
$13M
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.
$302K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$280
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-19.6%vs the Lawrence ZIP median sale $/ft² ($348)

Sales Performance

$298K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+10.8%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
2
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
4.7%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+4.6%per yeartypical hold 5.7 yrsfrom 59 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19902000200420082012201820222026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19902000200420082012201820222026

103 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.
$247K$273K$300K$326K1,019 ft²1,043 ft²1,067 ft²1,092 ft²1,116 ft²1,140 ft²
2 bd
2 bed
43 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 · 1.5 ba · 1,080 ft²
20 units
2 bd · 1.5 ba · 1,075 ft²
18 units
One-off layouts
5 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.

$247K–$250K
2 units
$279K–$279K
2 units
$294K–$296K
4 units
$296K–$305K
23 units
$307K–$315K
9 units
$319K–$326K
2 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.79%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.5%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.9.4 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.42%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$281,587
Median tax billThe middle annual property tax bill among the building's units.$2,057
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 23Jan 8, 2026$300,000Unit 43Dec 23, 2025$295,000Unit 9Nov 15, 2024$268,500Unit 24Oct 2, 2024$267,500Unit 6Jul 26, 2024$280,000Unit 6Jun 11, 2024$20,000Unit 21Sep 1, 2023$250,000Unit 25Jul 29, 2022$240,000Unit 2Nov 5, 2021$185,000Unit 7Jul 8, 2021$200,000

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

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$2,184 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$252,800 (2026)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$252,800
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$233,700
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$271,030

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.19 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.30%
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
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
CountyESSEX
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

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

E
Parthum Elementary SchoolD
Elementary · Grades KG–5 · 0.7 mi
M
Parthum Middle SchoolD+
Middle · Grades 5–8 · 0.7 mi
H
Lawrence High SchoolD-
High · Grades 9–12 · 2.2 mi

District: Lawrence School District

Neighborhood · ZIP 01841These 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.100
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.92
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.93

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.97%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.10%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.18%
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.53,889
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.17,591 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$50,780
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$64,109
Average tempThe average temperature here across a full year.48°F
Annual precipHow much rain and melted snow falls here in a typical year.45 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 Knox St
2 bd · 1.5 ba · 1,075 ft²
$308K
20 Knox St # 1
2 bd · 1.5 ba · 1,075 ft²
$301K
20 Knox St
2 bd · 1.5 ba · 1,075 ft²
$300K
20 Knox St # 3
2 bd · 1.5 ba · 1,075 ft²
$302K
20 Knox St # 4
2 bd · 1.5 ba · 1,076 ft²
$295K
20 Knox St # 5
2 bd · 1.5 ba · 1,075 ft²
$300K
20 Knox St # 6
2 bd · 1.5 ba · 1,075 ft²
$295K
20 Knox St # 7
2 bd · 1.5 ba · 1,024 ft²
$296K
20 Knox St # 8
2 bd · 1.5 ba · 1,122 ft²
20 Knox St # 9
2 bd · 1.5 ba · 1,075 ft²
$279K
20 Knox St # 10
2 bd · 1.5 ba · 1,075 ft²
$308K
20 Knox St # 11
2 bd · 1.5 ba · 1,075 ft²
$308K
20 Knox St # 12
2 bd · 1.5 ba · 1,075 ft²
$308K
20 Knox St # 13
2 bd · 1.5 ba · 1,075 ft²
$303K
20 Knox St # 14
2 bd · 1.5 ba · 1,075 ft²
$303K
20 Knox St # 15
2 bd · 1.5 ba · 1,075 ft²
$302K
20 Knox St # 16
2 bd · 1.5 ba · 1,075 ft²
$297K
20 Knox St # 17
2 bd · 1.5 ba · 1,075 ft²
$308K
20 Knox St # 18
2 bd · 1.5 ba · 1,075 ft²
$326K
20 Knox St # 19
2 bd · 1.5 ba · 1,075 ft²
$297K
20 Knox St # 21
2 bd · 1.5 ba · 1,075 ft²
$310K
20 Knox St # 22
2 bd · 1.5 ba · 1,075 ft²
$304K
20 Knox St # 23
2 bd · 1.5 ba · 1,080 ft²
$303K
20 Knox St # 24
2 bd · 1.5 ba · 1,080 ft²
$279K
20 Knox St # 25
2 bd · 1.5 ba · 1,080 ft²
$304K
20 Knox St # 26
2 bd · 1.5 ba · 1,080 ft²
$299K
20 Knox St # 27
2 bd · 1.5 ba · 1,080 ft²
$302K
20 Knox St # 28
2 bd · 1.5 ba · 1,080 ft²
$308K
20 Knox St # 29
2 bd · 1.5 ba · 1,080 ft²
$250K
20 Knox St # 30
2 bd · 1.5 ba · 1,080 ft²
$299K
20 Knox St # 31
2 bd · 1.5 ba · 1,080 ft²
$305K
20 Knox St # 32
2 bd · 1.5 ba · 1,080 ft²
$294K
20 Knox St # 33
2 bd · 1.5 ba · 1,080 ft²
$296K
20 Knox St # 34
2 bd · 1.5 ba · 1,080 ft²
$301K
20 Knox St # 35
2 bd · 1.5 ba · 1,080 ft²
$319K
20 Knox St # 36
2 bd · 1.5 ba · 1,080 ft²
$308K
20 Knox St # 37
2 bd · 1.5 ba · 1,080 ft²
$302K
20 Knox St # 38
2 bd · 1.5 ba · 1,080 ft²
$302K
20 Knox St # 39
2 bd · 1.5 ba · 1,080 ft²
$247K
20 Knox St # 40
2 bd · 1.5 ba · 1,019 ft²
$302K
20 Knox St # 41
2 bd · 1.5 ba · 1,080 ft²
$300K
20 Knox St # 42
2 bd · 1.5 ba · 1,080 ft²
$307K
20 Knox St # 43
2 bd · 1.5 ba · 1,080 ft²
$299K
20 Knox St # 44
2 bd · 1.5 ba · 1,140 ft²
$315K

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

About 20 Knox St

How many units are in 20 Knox St, Lawrence, MA?

20 Knox St, Lawrence, MA has 43 residential units across built in 1987, according to county assessor records.

What is a unit at 20 Knox St, Lawrence, MA worth?

The median TopHap Estimate across the 43 units at 20 Knox St, Lawrence, MA is $301,709. That works out to $280 per square foot. Units run from 1,019 to 1,140 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 20 Knox St, Lawrence, MA expensive for Lawrence?

Units at 20 Knox St, Lawrence, MA carry a median of $280 per square foot, 20% below the Lawrence median of $348 per square foot.

How often do units sell at 20 Knox St, Lawrence, MA?

2 units at 20 Knox St, Lawrence, MA sold in the last 12 months, out of 103 recorded arms-length sales all time. That is a turnover rate of 4.7% of the building per year. The median sale over that period was $298K.

Have units at 20 Knox St, Lawrence, MA appreciated?

Across 59 repeat sales of the same unit, 20 Knox St, Lawrence, MA returned a median 4.6% 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 5.7 years.

What floor plans does 20 Knox St, Lawrence, MA have?

The most common plan at 20 Knox St, Lawrence, MA is a 2-bedroom of 1,080 square feet, repeated 20 times, with a median estimate of $301,064. TopHap identifies 2 recurring plans in the building.

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