Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential
$710,063$442 / 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 96How 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
Last sold for $645,000 on Sep 15, 2023

18 UNION ST UNIT 1

NATICK, MA 01760
Building report
3
Beds
2
Baths
1,608 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.
1990
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$710K
$685K low$735K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$645,000 · Sep 15, 2023

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,366 (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.$615,900 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$615,900
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$591,800

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountyMiddlesex
HeatingThe type of heating system in the home.Forced Air
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.

E
Lilja Elementary SchoolA-
Elementary · Grades KG–4 · 0.9 mi
H
Natick High SchoolA
High · Grades 9–12 · 1.3 mi
M
Wilson Middle SchoolA-
Middle · Grades 5–8 · 1.6 mi

District: Natick School District

Neighborhood · ZIP 01760These 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.79
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.99
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.70

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.35%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.4.7%
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.37,721
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,380 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$133,738
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$174,842
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

18 Union St Unit 1 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.

  • Worth less than 73% of homes in Natick 01760
  • Costs less per square foot than 75% of homes in Natick 01760
  • Newer than 82% of homes in Middlesex County

What homes are worth in Natick 01760

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

This home
$303K$2M

This home is worth more than 27% of homes in Natick 01760.

How it measures up in Natick 01760

The dot is this home. The mark in the middle is the typical home in Natick 01760.

Estimated value$710,063
CheaperTypical $859,001Pricier

Pricier than 27% of homes nearby

Price per ft²$442
CheaperTypical $490Pricier

Pricier than 25% of homes nearby

Living area1,608 ft²
SmallerTypical 1,705 ft²Bigger

Bigger than 44% of homes nearby

Year built1990
OlderTypical 1955Newer

Newer than 81% of homes nearby

How 18 Union St Unit 1 ranks against every home in each area.
MeasureThis homeNatick 01760Middlesex County
Estimated valuepricier than$710,06327% of homes41% of homes
Price per ft²pricier than$44225% of homes45% of homes
Living areabigger than1,608 ft²44% of homes40% of homes
Year builtnewer than199081% of homes82% of homes

About 18 Union St Unit 1

How much is 18 Union St Unit 1, Natick, MA worth?

The TopHap Estimate for 18 Union St Unit 1, Natick, MA is $710,063 as of Aug 30, 2026. The likely range is $685,108 to $735,018. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Union St Unit 1, Natick, MA last sell?

18 Union St Unit 1, Natick, MA last sold on Sep 15, 2023 for $645,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 18 Union St Unit 1, Natick, MA?

18 Union St Unit 1, Natick, MA has 3 bedrooms, 2 bathrooms and 1,608 square feet of living space.

When was 18 Union St Unit 1, Natick, MA built?

18 Union St Unit 1, Natick, MA was built in 1990, making it 36 years old. The building has 2 stories.

What schools serve 18 Union St Unit 1, Natick, MA?

18 Union St Unit 1, Natick, MA is assigned to Lilja Elementary School (elementary), rated A-; Natick High School (high), rated A; Wilson Middle School (middle), rated A-. All sit in Natick School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Union St Unit 1, Natick, MA compare to other homes in Natick 01760?

Among the 12,050 homes in Natick 01760, it is worth more than 27% of them ($710,063 against a typical $859,001), its price per square foot is higher than 25% of them ($442 against a typical $490), it is bigger than 44% of them (1,608 ft² against a typical 1,705 ft²) and it is newer than 81% of them (1990 against a typical 1955). Measured against all of Middlesex County, it is worth more than 41% 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 18 Union St Unit 1, Natick, MA?

The 2025 property tax bill for 18 Union St Unit 1, Natick, MA was $7,366. The county assessed it at $615,900.

More homes on Union St Unit 1

Closest homes

More homes in Natick 01760

Assigned schools

Explore the area

See this home in context

Open 18 Union St Unit 1 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