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Single Family ResidenceResidential
$851,005$201 / 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 95How 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

518 SIMONDS RD

ASHBY, MA 01431
4
Beds
3.5
Baths
4,224 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.
6.05 ac
Lot SizeThe size of the land the home sits on, from county records.
2001
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
11
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

$851K
$805K low$897K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,763 (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.$706,700 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$85,400
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$621,300
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$583,015

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.41
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
18
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
56
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
39
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.Contemporary
CountyMIDDLESEX
Lot (acres)The size of the land the home sits on, from county records.6.05
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
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.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(7)

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
Ashby Elementary SchoolB-
Elementary · Grades KG–4 · 1.7 mi
M
Hawthorne Brook Middle SchoolC-
Middle · Grades 5–8 · 5.4 mi
H
North Middlesex Regional High SchoolB-
High · Grades 9–12 · 7.8 mi

District: North Middlesex School District

Neighborhood · ZIP 01431These 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.92
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.93
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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.2.9%
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.3,266
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.136 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$108,151
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$136,531
Average tempThe average temperature here across a full year.46°F
Annual precipHow much rain and melted snow falls here in a typical year.49 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

518 Simonds Rd 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 98% of homes in Ashby 01431
  • Among the lowest price per square foot in Middlesex County
  • Among the largest homes in Ashby 01431
  • Has a bigger lot than 95% of homes in Middlesex County
  • Newer than 89% of homes in Middlesex County

What homes are worth in Ashby 01431

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

This home
$204K$851K

This home is worth more than 98% of homes in Ashby 01431.

How it measures up in Ashby 01431

The dot is this home. The mark in the middle is the typical home in Ashby 01431.

Estimated value$851,005
CheaperTypical $459,735Pricier

Pricier than 98% of homes nearby

Price per ft²$201
CheaperTypical $265Pricier

Pricier than 14% of homes nearby

Living area4,224 ft²
SmallerTypical 1,764 ft²Bigger

Bigger than almost all homes nearby

Lot size6.05 ac
SmallerTypical 2.11 acBigger

Bigger than 81% of homes nearby

Year built2001
OlderTypical 1972Newer

Newer than 84% of homes nearby

How 518 Simonds Rd ranks against every home in each area.
MeasureThis homeAshby 01431Middlesex County
Estimated valuepricier than$851,00598% of homes58% of homes
Price per ft²pricier than$20114% of homesalmost no homes
Living areabigger than4,224 ft²almost all homes96% of homes
Lot sizebigger than6.05 ac81% of homes95% of homes
Year builtnewer than200184% of homes89% of homes

About 518 Simonds Rd

How much is 518 Simonds Rd, Ashby, MA worth?

The TopHap Estimate for 518 Simonds Rd, Ashby, MA is $851,005 as of Sep 24, 2026. The likely range is $804,543 to $897,467. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 518 Simonds Rd, Ashby, MA last sell?

518 Simonds Rd, Ashby, MA last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 518 Simonds Rd, Ashby, MA?

518 Simonds Rd, Ashby, MA has 4 bedrooms, 3.5 bathrooms, 4,224 square feet of living space and a 6.05-acre lot.

When was 518 Simonds Rd, Ashby, MA built?

518 Simonds Rd, Ashby, MA was built in 2001, making it 25 years old. It is a contemporary home. The building has 2 stories.

What schools serve 518 Simonds Rd, Ashby, MA?

518 Simonds Rd, Ashby, MA is assigned to Ashby Elementary School (elementary), rated B-; Hawthorne Brook Middle School (middle), rated C-; North Middlesex Regional High School (high), rated B-. All sit in North Middlesex School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 518 Simonds Rd, Ashby, MA compare to other homes in Ashby 01431?

Among the 1,214 homes in Ashby 01431, it is worth more than 98% of them ($851,005 against a typical $459,735), its price per square foot is higher than 14% of them ($201 against a typical $265), it is bigger than almost all of them (4,224 ft² against a typical 1,764 ft²), its lot is bigger than 81% of them (6.05 ac against a typical 2.11 ac) and it is newer than 84% of them (2001 against a typical 1972). Measured against all of Middlesex County, it is worth more than 58% 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 518 Simonds Rd, Ashby, MA?

The 2025 property tax bill for 518 Simonds Rd, Ashby, MA was $10,763. The county assessed it at $706,700.

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