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Single Family ResidenceResidential
$469,187$351 / 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 93How 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 $122,000 on Jul 31, 1987

20 GROSVENOR ST

AYER, MA 01432
3
Beds
2.5
Baths
1,336 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.
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
1
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.
1
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$469K
$435K low$504K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$122,000 · Jul 31, 1987

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,669 (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.$390,400 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$112,200
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$278,200
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$487,635

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.Ranch
CountyMIDDLESEX
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.1988
Lot (acres)The size of the land the home sits on, from county records.0.21
ConstructionThe main material the home's frame and walls are built from.Concrete
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
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
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
Ayer Shirley Regional High SchoolB
High · Grades 9–12 · 1.3 mi
E
Page Hilltop Elementary SchoolB-
Elementary · Grades PK–5 · 1.3 mi
M
Ayer Shirley Regional Middle SchoolB-
Middle · Grades 6–8 · 3.7 mi

District: Ayer-Shirley School District

Neighborhood · ZIP 01432These 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.116
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.100
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69

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.27%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.2%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.3%
PopulationHow many people live in this area.8,319
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.972 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$96,941
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$133,807
Average tempThe average temperature here across a full year.48°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%

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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

20 Grosvenor 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.

  • Worth less than 88% of homes in Middlesex County
  • Costs less per square foot than 80% of homes in Middlesex County
  • Smaller than 74% of homes in Middlesex County
  • Has a smaller lot than 82% of homes in Ayer 01432
  • Older than 76% of homes in Ayer 01432

What homes are worth in Ayer 01432

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

This home
$285K$934K

This home is worth more than 29% of homes in Ayer 01432.

How it measures up in Ayer 01432

The dot is this home. The mark in the middle is the typical home in Ayer 01432.

Estimated value$469,187
CheaperTypical $555,840Pricier

Pricier than 29% of homes nearby

Price per ft²$351
CheaperTypical $351Pricier

Pricier than 50% of homes nearby

Living area1,336 ft²
SmallerTypical 1,641 ft²Bigger

Bigger than 30% of homes nearby

Lot size0.21 ac
SmallerTypical 0.45 acBigger

Bigger than 18% of homes nearby

Year built1940
OlderTypical 1976Newer

Newer than 24% of homes nearby

How 20 Grosvenor St ranks against every home in each area.
MeasureThis homeAyer 01432Middlesex County
Estimated valuepricier than$469,18729% of homes12% of homes
Price per ft²pricier than$35150% of homes20% of homes
Living areabigger than1,336 ft²30% of homes26% of homes
Lot sizebigger than0.21 ac18% of homes36% of homes
Year builtnewer than194024% of homes36% of homes

About 20 Grosvenor St

How much is 20 Grosvenor St, Ayer, MA worth?

The TopHap Estimate for 20 Grosvenor St, Ayer, MA is $469,187 as of Sep 24, 2026. The likely range is $434,558 to $503,816. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 20 Grosvenor St, Ayer, MA last sell?

20 Grosvenor St, Ayer, MA last sold on Jul 31, 1987 for $122,000, according to the county's recorded deed.

How big is 20 Grosvenor St, Ayer, MA?

20 Grosvenor St, Ayer, MA has 3 bedrooms, 2.5 bathrooms, 1,336 square feet of living space and a 0.21-acre lot.

When was 20 Grosvenor St, Ayer, MA built?

20 Grosvenor St, Ayer, MA was built in 1940, making it 86 years old. It is a ranch home. The building has 1 story.

What schools serve 20 Grosvenor St, Ayer, MA?

20 Grosvenor St, Ayer, MA is assigned to Ayer Shirley Regional High School (high), rated B; Page Hilltop Elementary School (elementary), rated B-; Ayer Shirley Regional Middle School (middle), rated B-. All sit in Ayer-Shirley School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 20 Grosvenor St, Ayer, MA compare to other homes in Ayer 01432?

Among the 2,710 homes in Ayer 01432, it is worth more than 29% of them ($469,187 against a typical $555,840), its price per square foot is higher than 50% of them ($351 against a typical $351), it is bigger than 30% of them (1,336 ft² against a typical 1,641 ft²), its lot is bigger than 18% of them (0.21 ac against a typical 0.45 ac) and it is newer than 24% of them (1940 against a typical 1976). Measured against all of Middlesex County, it is worth more than 12% 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 20 Grosvenor St, Ayer, MA?

The 2025 property tax bill for 20 Grosvenor St, Ayer, MA was $4,669. The county assessed it at $390,400.

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