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CondominiumResidential
Last sold for $290,000 on Sep 30, 2021

21 LINDEN ST

NORWALK, CT 06851
1985
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
Built 198525 units1,170–1,200 ft²
$11M
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.
$459K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$390
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

-11.3%vs the Norwalk ZIP median sale $/ft² ($440)

Sales Performance

$480K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+24.7%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
4.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+6.3%per yeartypical hold 6.6 yrsfrom 41 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871992199720022006201420212026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871992199720022006201420212026

64 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.
$405K$445K$485K$524K1,170 ft²1,176 ft²1,182 ft²1,188 ft²1,194 ft²1,200 ft²
2 bd
2 bed
25 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 · 2.5 ba · 1,170 ft²
14 units
2 bd · 2.5 ba · 1,180 ft²
4 units
2 bd · 2 ba · 1,170 ft²
2 units
2 bd · 2 ba · 1,200 ft²
2 units
2 bd · 2.5 ba · 1,200 ft²
2 units
One-off layouts
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.

$405K–$417K
3 units
$431K–$431K
1 unit
$439K–$446K
7 units
$458K–$461K
3 units
$465K–$475K
6 units
$485K–$491K
3 units
$505K–$505K
1 unit
$524K–$524K
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.80%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.8%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.11.2 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.100%
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.34%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$425,463
Median tax billThe middle annual property tax bill among the building's units.$5,811
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 12Jun 18, 2026$480,000Unit 5Jul 11, 2025$385,000Unit 15Jun 26, 2025$389,000Unit 16Nov 12, 2024$385,000Unit 2Jul 11, 2023$375,000Unit 25Oct 14, 2022$347,000BuildingSep 30, 2021$290,000Unit 11Dec 30, 2020$277,500Unit 6Oct 29, 2018$320,000Unit 1Oct 1, 2018$308,000

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.$5,471 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$230,440 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$230,440
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$230,440
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$161,308

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.40
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
5
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.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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
CountyWESTERN CONNECTICUT
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.1992
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Forced Air With Air Conditioning
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
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

Transaction History(8)

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.

M
West Rocks Middle SchoolC
Middle · Grades 6–8 · 0.5 mi
E
Silvermine Elementary SchoolD+
Elementary · Grades KG–5 · 1.1 mi
H
Norwalk High SchoolD
High · Grades 9–12 · 2.0 mi

District: Norwalk School District

Neighborhood · ZIP 06851These 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.86
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.111
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.90

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.24%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.8.4%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.31,871
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,096 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$110,256
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$139,232
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.50 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.

21 Linden St
2 bd · 2.5 ba · 1,170 ft²
$680K
21 Linden St
2 bd · 2.5 ba · 1,200 ft²
$491K
21 Linden St
2 bd · 2.5 ba · 1,170 ft²
$461K
21 Linden St # 3
2 bd · 1.5 ba · 1,170 ft²
$505K
21 Linden St # 4
2 bd · 2.5 ba · 1,170 ft²
$524K
21 Linden St # 5
2 bd · 2.5 ba · 1,170 ft²
$405K
21 Linden St # 6
2 bd · 2.5 ba · 1,170 ft²
$475K
21 Linden St # 7
2 bd · 2.5 ba · 1,200 ft²
$468K
21 Linden St # 8
2 bd · 2.5 ba · 1,180 ft²
$459K
21 Linden St # 9
2 bd · 2.5 ba · 1,170 ft²
$491K
21 Linden St # 10
2 bd · 2.5 ba · 1,170 ft²
$475K
21 Linden St # 11
2 bd · 2.5 ba · 1,170 ft²
$473K
21 Linden St # 12
2 bd · 2.5 ba · 1,170 ft²
$485K
21 Linden St # 13
2 bd · 2.5 ba · 1,170 ft²
$470K
21 Linden St # 14
2 bd · 2.5 ba · 1,180 ft²
$465K
21 Linden St # 15
2 bd · 2 ba · 1,170 ft²
$410K
21 Linden St # 16
2 bd · 2 ba · 1,200 ft²
$417K
21 Linden St # 17
2 bd · 2 ba · 1,200 ft²
$444K
21 Linden St # 18
2 bd · 2 ba · 1,170 ft²
$431K
21 Linden St # 19
2 bd · 2.5 ba · 1,180 ft²
$439K
21 Linden St # 20
2 bd · 2.5 ba · 1,170 ft²
$442K
21 Linden St # 22
2 bd · 2.5 ba · 1,170 ft²
$444K
21 Linden St # 23
2 bd · 2.5 ba · 1,170 ft²
$446K
21 Linden St # 24
2 bd · 2.5 ba · 1,170 ft²
$445K
21 Linden St # 25
2 bd · 2.5 ba · 1,170 ft²
$458K
21 Linden St # 26
2 bd · 2.5 ba · 1,180 ft²
$439K

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

About 21 Linden St

How many units are in 21 Linden St, Norwalk, CT?

21 Linden St, Norwalk, CT has 25 residential units across built in 1985, according to county assessor records.

What is a unit at 21 Linden St, Norwalk, CT worth?

The median TopHap Estimate across the 25 units at 21 Linden St, Norwalk, CT is $458,514. That works out to $390 per square foot. Units run from 1,170 to 1,200 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 21 Linden St, Norwalk, CT expensive for Norwalk?

Units at 21 Linden St, Norwalk, CT carry a median of $390 per square foot, 11% below the Norwalk median of $440 per square foot.

How often do units sell at 21 Linden St, Norwalk, CT?

1 units at 21 Linden St, Norwalk, CT sold in the last 12 months, out of 64 recorded arms-length sales all time. That is a turnover rate of 4.0% of the building per year. The median sale over that period was $480K.

Have units at 21 Linden St, Norwalk, CT appreciated?

Across 41 repeat sales of the same unit, 21 Linden St, Norwalk, CT returned a median 6.3% 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 6.6 years.

What floor plans does 21 Linden St, Norwalk, CT have?

The most common plan at 21 Linden St, Norwalk, CT is a 2-bedroom of 1,170 square feet, repeated 14 times, with a median estimate of $465,447. TopHap identifies 5 recurring plans in the building.

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