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CondominiumResidential
$8,685,472$1,516 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 82How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026
Last sold for $6,000,000 on Sep 30, 2016

4 BYRON ST

BOSTON, MA 02108
4
Beds
7 / 2
Baths
5,729 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.14 ac
Lot SizeThe size of the land the home sits on, from county records.
1890
Year BuiltThe year the home was originally built, according to county records.
9
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$8.7M
$7.2M low$10M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$6,000,000 · Sep 30, 2016

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$92,998 (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.$8,030,900 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$8,030,900
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$7,855,170

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.36 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.2018
Lot (acres)The size of the land the home sits on, from county records.0.14
HeatingThe type of heating system in the home.Hot Water
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

Transaction History(3)

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.

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%

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

How this home compares

4 Byron St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Among the most valuable homes in Suffolk County
  • Costs more per square foot than 95% of homes in Suffolk County
  • Among the largest homes in Suffolk County
  • Among the largest lots in Beacon Hill
  • Older than 87% of homes in Suffolk County

What homes are worth in Boston 02108

Each bar is how many homes fall in that price range. The marker is this home.

This home
$457K$10M

This home is worth more than 96% of homes in Boston 02108.

How it measures up in Boston 02108

The dot is this home. The mark in the middle is the typical home in Boston 02108.

Estimated value$8,685,472
CheaperTypical $1,600,051Pricier

Pricier than 96% of homes nearby

Price per ft²$1516
CheaperTypical $1397Pricier

Pricier than 65% of homes nearby

Living area5,729 ft²
SmallerTypical 1,300 ft²Bigger

Bigger than 94% of homes nearby

Lot size0.14 ac
SmallerTypical 1,133 ft²Bigger

Bigger than almost all homes nearby

Year built1890
OlderTypical 1899Newer

Newer than 37% of homes nearby

How 4 Byron St ranks against every home in each area.
MeasureThis homeBeacon HillBoston 02108Suffolk County
Estimated valuepricier than$8,685,47298% of homes96% of homesalmost all homes
Price per ft²pricier than$151673% of homes65% of homes95% of homes
Living areabigger than5,729 ft²96% of homes94% of homesalmost all homes
Lot sizebigger than0.14 acalmost all homesalmost all homes85% of homes
Year builtnewer than189037% of homes37% of homes13% of homes

About 4 Byron St

How much is 4 Byron St, Boston, MA worth?

The TopHap Estimate for 4 Byron St, Boston, MA is $8,685,472 as of Sep 24, 2026. The likely range is $7,153,989 to $9,999,999. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 4 Byron St, Boston, MA last sell?

4 Byron St, Boston, MA last sold on Sep 30, 2016 for $6,000,000, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 4 Byron St, Boston, MA?

4 Byron St, Boston, MA has 4 bedrooms, 7 bathrooms, 5,729 square feet of living space and a 0.14-acre lot.

When was 4 Byron St, Boston, MA built?

4 Byron St, Boston, MA was built in 1890, making it 136 years old.

What schools serve 4 Byron St, Boston, MA?

4 Byron St, Boston, MA is assigned to Boston Adult Technical Academy (high); Josiah Quincy Elementary School (elementary), rated B+; Quincy Upper School (middle), rated D+. All sit in Boston School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 4 Byron St, Boston, MA compare to other homes in Boston 02108?

Among the 1,489 homes in Boston 02108, it is worth more than 96% of them ($8,685,472 against a typical $1,600,051), its price per square foot is higher than 65% of them ($1516 against a typical $1397), it is bigger than 94% of them (5,729 ft² against a typical 1,300 ft²), its lot is bigger than almost all of them (0.14 ac against a typical 1,133 ft²) and it is newer than 37% of them (1890 against a typical 1899). Measured against all of Suffolk County, it is worth more than almost all homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 4 Byron St, Boston, MA?

The 2025 property tax bill for 4 Byron St, Boston, MA was $92,998. The county assessed it at $8,030,900.

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