Skip to content
Skip to content
TopHapOpen in map
Single Family ResidenceResidential
$2,011,331$497 / 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 90How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

186 LYMAN ST

WALTHAM, MA 02452
4
Beds
3 / 1
Baths
4,049 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.
0.28 ac
Lot SizeThe size of the land the home sits on, from county records.
2018
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$2M
$1.8M low$2.2M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$16,398 (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.$1,669,900 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$487,000
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$1,182,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$1,637,000

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.37
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.
59
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
89
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
32
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Colonial
CountyMiddlesex
Lot (acres)The size of the land the home sits on, from county records.0.28
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.Hot Water
CoolingThe type of cooling or air conditioning in the home.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

Transaction History(1)

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
Thomas R Plympton Elementary SchoolC
Elementary · Grades KG–5 · 0.6 mi
H
Waltham Sr High SchoolC
High · Grades 9–12 · 0.8 mi
M
John F. Kennedy Middle SchoolA-
Middle · Grades 6–8 · 0.9 mi

District: Waltham School District

Neighborhood · ZIP 02452These 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.93
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.105
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.77

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.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.10.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.17,230
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,328 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$97,289
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$131,986
Average tempThe average temperature here across a full year.49°F
Annual precipHow much rain and melted snow falls here in a typical year.47 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

Owner Tools

Do you own this home?
Claim this home

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

186 Lyman 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 Piety Corner
  • Costs more per square foot than 65% of homes in Piety Corner
  • Bigger than 97% of homes in Piety Corner
  • Among the newest homes in Waltham 02452

What homes are worth in Waltham 02452

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

This home
$364K$1.8M

This home is worth more than almost all homes in Waltham 02452.

How it measures up in Waltham 02452

The dot is this home. The mark in the middle is the typical home in Waltham 02452.

Estimated value$2,011,331
CheaperTypical $839,997Pricier

Pricier than almost all homes nearby

Price per ft²$497
CheaperTypical $465Pricier

Pricier than 58% of homes nearby

Living area4,049 ft²
SmallerTypical 1,895 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.28 ac
SmallerTypical 0.35 acBigger

Bigger than 44% of homes nearby

Year built2018
OlderTypical 1977Newer

Newer than almost all homes nearby

How 186 Lyman St ranks against every home in each area.
MeasureThis homePiety CornerWaltham 02452Middlesex County
Estimated valuepricier than$2,011,331almost all homesalmost all homes95% of homes
Price per ft²pricier than$49765% of homes58% of homes58% of homes
Living areabigger than4,049 ft²97% of homes95% of homes96% of homes
Lot sizebigger than0.28 ac57% of homes44% of homes47% of homes
Year builtnewer than201898% of homesalmost all homes98% of homes

About 186 Lyman St

How much is 186 Lyman St, Waltham, MA worth?

The TopHap Estimate for 186 Lyman St, Waltham, MA is $2,011,331 as of Aug 30, 2026. The likely range is $1,814,153 to $2,208,509. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

How big is 186 Lyman St, Waltham, MA?

186 Lyman St, Waltham, MA has 4 bedrooms, 3 bathrooms, 4,049 square feet of living space and a 0.28-acre lot.

When was 186 Lyman St, Waltham, MA built?

186 Lyman St, Waltham, MA was built in 2018, making it 8 years old. It is a colonial home. The building has 2 stories.

What schools serve 186 Lyman St, Waltham, MA?

186 Lyman St, Waltham, MA is assigned to Thomas R Plympton Elementary School (elementary), rated C; Waltham Sr High School (high), rated C; John F. Kennedy Middle School (middle), rated A-. All sit in Waltham School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 186 Lyman St, Waltham, MA compare to other homes in Waltham 02452?

Among the 3,442 homes in Waltham 02452, it is worth more than almost all of them ($2,011,331 against a typical $839,997), its price per square foot is higher than 58% of them ($497 against a typical $465), it is bigger than 95% of them (4,049 ft² against a typical 1,895 ft²), its lot is bigger than 44% of them (0.28 ac against a typical 0.35 ac) and it is newer than almost all of them (2018 against a typical 1977). Measured against all of Middlesex County, it is worth more than 95% of 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 186 Lyman St, Waltham, MA?

The 2025 property tax bill for 186 Lyman St, Waltham, MA was $16,398. The county assessed it at $1,669,900.

More homes on Lyman St

Closest homes

More homes in Waltham 02452

Assigned schools

Explore the area

See this home in context

Open 186 Lyman 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