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CondominiumResidential
$589,323$365 / 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 94How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $357,888 on May 25, 2018

170 SPLIT ROCK

ACTON, MA 01718
2
Beds
2.5
Baths
1,614 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.
7.77 ac
Lot SizeThe size of the land the home sits on, from county records.
1972
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.

Valuation

$589K
$552K low$626K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$357,888 · May 25, 2018
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$269,023
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$215,218
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.58%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$320,300
MSA MTG · recorded Sep 29, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,801 (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.$513,200 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$513,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$503,310

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountyMIDDLESEX
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(14)

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
Acton - Boxborough Regional High SchoolA
High · Grades 9–12 · 3.1 mi
E
Luther Conant Elementary SchoolA+
Elementary · Grades KG–6 · 3.2 mi
M
R. J. Grey Junior High SchoolA
Middle · Grades 7–8 · 3.3 mi

District: Acton-Boxborough School District

Neighborhood · ZIP 01718These 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.130
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.102
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.74

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.97%
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.2.0%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.59
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,659 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$134,897
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,056
Average tempThe average temperature here across a full year.48°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Owner occupied
Company ownedWhether the owner is a company or trust rather than a person.No

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

170 Split Rock 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 more than 97% of homes in Acton 01718
  • Costs more per square foot than 83% of homes in Acton 01718
  • Has a bigger lot than 96% of homes in Middlesex County
  • Among the newest homes in Acton 01718

What homes are worth in Acton 01718

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

This home
$400K$603K

This home is worth more than 97% of homes in Acton 01718.

How it measures up in Acton 01718

The dot is this home. The mark in the middle is the typical home in Acton 01718.

Estimated value$589,323
CheaperTypical $523,631Pricier

Pricier than 97% of homes nearby

Price per ft²$365
CheaperTypical $333Pricier

Pricier than 83% of homes nearby

Living area1,614 ft²
SmallerTypical 1,594 ft²Bigger

Bigger than 61% of homes nearby

Lot size7.77 ac
SmallerTypical 10.95 acBigger

Bigger than 28% of homes nearby

Year built1972
OlderTypical 1972Newer

Newer than almost all homes nearby

How 170 Split Rock ranks against every home in each area.
MeasureThis homeActon 01718Middlesex County
Estimated valuepricier than$589,32397% of homes24% of homes
Price per ft²pricier than$36583% of homes23% of homes
Living areabigger than1,614 ft²61% of homes40% of homes
Lot sizebigger than7.77 ac28% of homes96% of homes
Year builtnewer than1972almost all homes66% of homes

About 170 Split Rock

How much is 170 Split Rock, Acton, MA worth?

The TopHap Estimate for 170 Split Rock, Acton, MA is $589,323 as of Jul 14, 2026. The likely range is $552,216 to $626,430. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 170 Split Rock, Acton, MA last sell?

170 Split Rock, Acton, MA last sold on May 25, 2018 for $357,888, according to the county's recorded deed. TopHap holds 3 recorded sales for this parcel.

How big is 170 Split Rock, Acton, MA?

170 Split Rock, Acton, MA has 2 bedrooms, 2.5 bathrooms and 1,614 square feet of living space.

When was 170 Split Rock, Acton, MA built?

170 Split Rock, Acton, MA was built in 1972, making it 54 years old. The building has 2 stories.

What schools serve 170 Split Rock, Acton, MA?

170 Split Rock, Acton, MA is assigned to Acton - Boxborough Regional High School (high), rated A; Luther Conant Elementary School (elementary), rated A+; R. J. Grey Junior High School (middle), rated A. All sit in Acton-Boxborough School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 170 Split Rock, Acton, MA compare to other homes in Acton 01718?

Among the 277 homes in Acton 01718, it is worth more than 97% of them ($589,323 against a typical $523,631), its price per square foot is higher than 83% of them ($365 against a typical $333), it is bigger than 61% of them (1,614 ft² against a typical 1,594 ft²), its lot is bigger than 28% of them (7.77 ac against a typical 10.95 ac) and it is newer than almost all of them (1972 against a typical 1972). Measured against all of Middlesex County, it is worth more than 24% 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 170 Split Rock, Acton, MA?

The 2025 property tax bill for 170 Split Rock, Acton, MA was $8,801. The county assessed it at $513,200.

More homes on Split Rock

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Assigned schools

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