CondominiumResidential
666 Main St
WINCHESTER, MA 01890
0.13 ac
Lot SizeThe size of the land the home sits on, from county records.
1982
Year BuiltThe year the home was originally built, according to county records.
1
StoriesHow many floors the home has above ground.
Built 19824 floors47 units810–1,415 ft²
$36M
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.
$759K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$634
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.
+128.1%vs the Winchester ZIP median sale $/ft² ($278)
Sales Performance
$750K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+9.5%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
1
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
2.1%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+4.8%per yeartypical hold 7.1 yrsfrom 66 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
19871992199720022008201520212026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
19871992199720022008201520212026
110 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.
1 bd2 bd
1 bed
1 unit$629K · $776/ft²
2 bed
46 units$761K · $630/ft²
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 ba · 1,170 ft²
26 units$764K · $653/ft²
2 bd · 2.5 ba · 1,170 ft²
5 units$805K · $688/ft²
2 bd · 2 ba · 1,240 ft²
5 units$749K · $604/ft²
2 bd · 2 ba · 1,025 ft²
3 units$751K · $732/ft²
2 bd · 2 ba · 1,415 ft²
3 units$827K · $584/ft²
2 bd · 2 ba · 1,160 ft²
2 units$697K · $601/ft²
One-off layouts
3 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.
$619K–$650K
4 units
$685K–$715K
4 units
$721K–$749K
12 units
$751K–$776K
9 units
$782K–$811K
10 units
$815K–$829K
7 units
$879K–$879K
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
$643/ft²14 units · +1%
Floor 3
$642/ft²14 units · +1%
Floor 4
$660/ft²14 units · +4%
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 ·15
$704/ft²3 units · +11%
Line ·02
$692/ft²3 units · +9%
Line ·04
$684/ft²3 units · +8%
Line ·09
$683/ft²3 units · +8%
Line ·07
$670/ft²3 units · +6%
Line ·10
$668/ft²3 units · +5%
Line ·03
$667/ft²3 units · +5%
Line ·05
$643/ft²3 units · +1%
Line ·06
$634/ft²3 units · +0%
Line ·08
$621/ft²3 units · -2%
Line ·11
$609/ft²3 units · -4%
Line ·12
$609/ft²3 units · -4%
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.36%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.11.5 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.18%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$757,780
Median tax billThe middle annual property tax bill among the building's units.$7,683
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 312Feb 5, 2026$750,000$605/ft²Unit 206Sep 10, 2025$710,000$607/ft²Unit 309Jun 16, 2025$834,000$713/ft²Unit L2Feb 25, 2025$630,000$543/ft²Unit L3Feb 12, 2025$660,000$569/ft²Unit 203Aug 29, 2024$761,000$650/ft²Unit 202Mar 29, 2023$762,000$651/ft²Unit 407Jan 25, 2023$550,000$470/ft²Unit 309Apr 7, 2022$750,000$641/ft²Unit 412Dec 7, 2021$570,000$460/ft²
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.132 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.34%
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.1 percent flood zone
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
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.0.13
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
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.
HEM
Winchester High SchoolA+
High · Grades 9–12 · 0.2 mi
Lincoln Elementary SchoolA
Elementary · Grades KG–5 · 0.3 mi
McCall Middle SchoolA
Middle · Grades 6–8 · 0.4 mi
District: Winchester School District
Neighborhood · ZIP 01890These 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.23
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.109
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.82
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.3.4%
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.23,604
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,661 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$195,899
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$255,940
Average tempThe average temperature here across a full year.49°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.
666 Main St # L1
2 bd · 1 ba · 1,150 ft²
666 Main St # L2
2 bd · 2 ba · 1,160 ft²
666 Main St # L3
2 bd · 1 ba · 1,160 ft²
666 Main St # L4
1 bd · 1.5 ba · 810 ft²
666 Main St # L5
2 bd · 2 ba · 1,160 ft²
666 Main St # 201
2 bd · 2 ba · 1,415 ft²
666 Main St Apt 202
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 203
2 bd · 2 ba · 1,170 ft²
666 Main St # 204
2 bd · 2.5 ba · 1,170 ft²
666 Main St Apt 205
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 206
2 bd · 2 ba · 1,170 ft²
666 Main St # 207
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 208
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 209
2 bd · 2 ba · 1,170 ft²
666 Main St # 210
2 bd · 2 ba · 1,170 ft²
666 Main St # 211
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 212
2 bd · 2 ba · 1,170 ft²
666 Main St # 215
2 bd · 2.5 ba · 1,025 ft²
666 Main St # 217
2 bd · 2 ba · 1,240 ft²
666 Main St Apt 301
2 bd · 2 ba · 1,415 ft²
666 Main St Apt 302
2 bd · 2 ba · 1,170 ft²
666 Main St # 303
2 bd · 2 ba · 1,170 ft²
666 Main St # 304
2 bd · 2.5 ba · 1,170 ft²
666 Main St # 305
2 bd · 2 ba · 1,170 ft²
666 Main St # 306
2 bd · 2.5 ba · 1,170 ft²
666 Main St # 307
2 bd · 2.5 ba · 1,170 ft²
666 Main St Apt 308
2 bd · 2 ba · 1,170 ft²
666 Main St # 309
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 310
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 311
2 bd · 2 ba · 1,170 ft²
666 Main St # 312
2 bd · 2 ba · 1,240 ft²
666 Main St # 315
2 bd · 2 ba · 1,025 ft²
666 Main St # 317
2 bd · 2 ba · 1,240 ft²
666 Main St Apt 401
2 bd · 2 ba · 1,415 ft²
666 Main St Apt 402
2 bd · 2 ba · 1,170 ft²
666 Main St # 403
2 bd · 2 ba · 1,170 ft²
666 Main St # 404
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 405
2 bd · 2 ba · 1,170 ft²
666 Main St # 406
2 bd · 2.5 ba · 1,170 ft²
666 Main St # 407
2 bd · 2.5 ba · 1,170 ft²
666 Main St Apt 408
2 bd · 2 ba · 1,170 ft²
666 Main St # 409
2 bd · 2.5 ba · 1,170 ft²
666 Main St Apt 410
2 bd · 2 ba · 1,170 ft²
666 Main St Apt 411
2 bd · 2 ba · 1,170 ft²
666 Main St # 412
2 bd · 2 ba · 1,240 ft²
666 Main St # 415
2 bd · 2 ba · 1,025 ft²
666 Main St Apt 417
2 bd · 2 ba · 1,240 ft²
Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.
About 666 Main St
How many units are in 666 Main St, Winchester, MA?
666 Main St, Winchester, MA has 47 residential units across 4 floors, built in 1982, according to county assessor records.
What is a unit at 666 Main St, Winchester, MA worth?
The median TopHap Estimate across the 47 units at 666 Main St, Winchester, MA is $759,421. That works out to $634 per square foot. Units run from 810 to 1,415 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.
Is 666 Main St, Winchester, MA expensive for Winchester?
Units at 666 Main St, Winchester, MA carry a median of $634 per square foot, 128% above the Winchester median of $278 per square foot.
How often do units sell at 666 Main St, Winchester, MA?
1 units at 666 Main St, Winchester, MA sold in the last 12 months, out of 110 recorded arms-length sales all time. That is a turnover rate of 2.1% of the building per year. The median sale over that period was $750K.
Have units at 666 Main St, Winchester, MA appreciated?
Across 66 repeat sales of the same unit, 666 Main St, Winchester, MA returned a median 4.8% 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 7.1 years.
What floor plans does 666 Main St, Winchester, MA have?
The most common plan at 666 Main St, Winchester, MA is a 2-bedroom of 1,170 square feet, repeated 26 times, with a median estimate of $764,211. TopHap identifies 6 recurring plans in the building.
More homes on Main St
- 666 Main St # 312$741K2 bd · 2 ba · 1,240 ft² · Sold $750K · Feb 2026
- 666 Main St # 206$698K2 bd · 2 ba · 1,170 ft² · Sold Jan 2026
- 89 Main St$1.2M3 bd · 1.5 ba · 2,159 ft² · Sold $1.2M · Nov 2025
- 163 Main St$1.2M4 bd · 2.5 ba · 1,893 ft² · Sold $1.2M · Aug 2025
- 666 Main St # 205$730K2 bd · 2 ba · 1,170 ft² · Sold Aug 2025
- 666 Main St # 309$819K2 bd · 2 ba · 1,170 ft² · Sold $834K · Jun 2025
- 666 Main St # 310$769K2 bd · 2 ba · 1,170 ft² · Sold Jun 2025
- 410 Main St$1.7M3 bd · 2.5 ba · 2,071 ft² · Sold $1.6M · Mar 2025
- 666 Main St # L2$619K2 bd · 2 ba · 1,160 ft² · Sold $630K · Feb 2025
- 666 Main St # L3$648K2 bd · 1 ba · 1,160 ft² · Sold $660K · Feb 2025
- 897 Main St # 1$843K2 bd · 2 ba · 1,202 ft² · Sold $810K · Oct 2024
- 336 Main St$3.8M7 bd · 4.5 ba · 6,265 ft² · Sold $457K · Sep 2024
Closest homes
- 666 Main St Apt 208$727K0 ft · 2 bd · 2 ba · 1,170 ft² · Sold Aug 1990
- 666 Main St Apt 410$815K0 ft · 2 bd · 2 ba · 1,170 ft² · Sold Nov 2023
- 666 Main St$774K0 ft · 2 bd · 2.5 ba · 1,170 ft² · Sold $538K · Jul 2020
- 666 Main St$650K0 ft · 2 bd · 2 ba · 1,025 ft² · Sold $555K · Sep 2020
- 666 Main St$804K0 ft · 2 bd · 2 ba · 1,170 ft² · Sold Jul 2012
- 666 Main St Apt 205$730K0 ft · 2 bd · 2 ba · 1,170 ft² · Sold Aug 2025
- 666 Main St Apt 301$827K0 ft · 2 bd · 2 ba · 1,415 ft² · Sold $184K · Feb 1995
- 666 Main St$619K0 ft · 2 bd · 2 ba · 1,160 ft² · Sold $630K · Feb 2025
More homes in Winchester 01890
- 53 Winford Way$1.1M3 bd · 1 ba · 1,946 ft² · Sold $2.3M · Sep 2026
- 46 Clark St$1.1M4 bd · 1 ba · 1,466 ft² · Sold $1M · Sep 2026
- 2 Olde Lyme Rd$1.7M3 bd · 2 ba · 2,513 ft² · Sold $1.9M · Sep 2026
- 16 Glenwood Ave6 bd · 4.5 ba · 6,554 ft² · Sold $1.8M · Sep 2026
- 12 Upland Rd$917K2 bd · 1 ba · 1,455 ft² · Sold $800K · Sep 2026
- 9 Watson Pl$746K3 bd · 1 ba · 981 ft² · Sold $760K · Aug 2026
- 78 Bacon St$2.3M5 bd · 3.5 ba · 3,492 ft² · Sold $2.3M · Aug 2026
- 52 Salem St$1.2M3 bd · 2.5 ba · 2,004 ft² · Sold $1.2M · Aug 2026
- 2 Everett Ave$3.2M6 bd · 4 ba · 6,148 ft² · Sold $3.2M · Aug 2026
- 8 Hawthorne Rd$1.8M5 bd · 2.5 ba · 3,315 ft² · Sold $1.8M · Aug 2026
- 22 Salem St2 bd · 1 ba · 793 ft² · Sold $615K · Aug 2026
- 18 Graystone Cir$1.7M2 bd · 2.5 ba · 2,574 ft² · Sold $1.8M · Aug 2026
Assigned schools
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