Watertown, MA
Middlesex County42.3653°N, 71.1843°W
Tracking 10,865 properties across Watertown, Massachusetts — a community where the median home dates to 1930 and the oldest to 1698. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
10,865
Properties Tracked
1930
Median Year Built
$846K
Median Assessed Value
0%
FEMA Flood Zone
3.16M
NEP Data Facts Tracked
Zone 1
Radon Zone
Click any parcel to view intelligence
Watertown, MAInc. 1630
Watertown is a dense inner suburb immediately west of Boston and Cambridge, with a housing stock that reflects its development as one of the earliest suburbs accessible by streetcar and automobile. The city's neighborhoods are compact and walkable, with a mix of single-family homes, two-families, and triple-deckers built primarily between 1880 and 1940. Watertown Square, at the junction of several commercial corridors, serves as the city's commercial center.
The Charles River forms Watertown's southern boundary, and the Arsenal on the Charles — a massive mixed-use development on a former military arsenal — represents the kind of adaptive reuse that has transformed many New England industrial properties. For property professionals, Watertown is an urban market where proximity to Cambridge and Boston drives values, and the older housing stock makes building condition and renovation history the critical assessment variables.
Risk Profile
FEMA flood zones, fire protection grades, radon — parcel by parcel
FEMA Flood Zones
12 properties (0%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
X
10,853
AE
12
Fire Protection Grades
Fire protection grades reflect proximity to fire stations and hydrant infrastructure. Grade affects insurance pricing in every New England state.
Grade A
2,078
Grade B
8,677
Grade C
110
Zone 1
Radon Risk
123 mph
Design Wind Speed
ASCE 7 standard
40 psf
Ground Snow Load
ASCE 7 standard
Very Low
FEMA Risk Index
NRI composite rating
The Property Landscape
10,865 properties · Median year built 1930 · Avg 2,896 sf
Property Types
Two-Family
4,039
Multi-Family
3,111
Single Family
2,860
Commercial
378
Institutional
255
Industrial
75
Other
53
Vacant Land
36
Three-Family
31
Mixed Use
16
Construction by Era
Pre-1800
7
1800-1849
106
1850-1899
863
1900-1949
5,920
1950-1979
2,106
1980-1999
876
2000+
744
Architectural Styles
Multi-Family
2,618
Colonial
1,383
Condominium
1,298
Townhouse
1,179
Cape Cod
620
Conventional
301
Ranch
282
APRTMNT-HR
137
Market Activity
Recorded transactions from Middlesex County Registry of Deeds
48%
Owner-Occupied
3%
Out-of-State Owners
NE Provenance tracks recorded deeds, mortgages, and liens for 98% of Watertown properties. Ownership intelligence includes transaction history, entity detection, portfolio identification, and lien analysis — assembled from public registry records into a single property-level profile.
Building Permits & Maintenance
63,832 municipal building permits on file · 67% of properties
NE Provenance tracks 63,832 building permits across 7,257 Watertown properties — 67% coverage. 4,142 properties have permit activity in the last five years.
Each permit record reveals maintenance decisions: roof replacements, electrical upgrades, kitchen renovations, solar installations. For insurance, lending, and appraisal professionals, permit history is the most objective evidence of property condition available from public records.
63,832
Permits on File
67%
Coverage
Properties with permits
4,142
Active (5yr)
Recent permit activity
97%
Condition Rated
NEP assessment
Living in Watertown
Middlesex County · Massachusetts
Zip Codes024530245802472
35,329
Population
2020 Census
10,865
Properties
$846K
Median Assessed
48%
Owner-Occupied
4.1
Square Miles
Watertown covers 4.1 square miles in Middlesex County, Massachusetts. The median assessed property value is $846K.
Single-family homes account for 2,860 of Watertown's 10,865 properties and 7,181 multi-family buildings. There are 378 commercial properties and 36 parcels of vacant land. About 48% of properties are owner-occupied, and 3% are owned by someone out of state.
Assessed values range widely — the middle 50% of properties fall between $619K and $1.0M, with the highest assessed property at $533.1M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most of Watertown (100%) is on municipal sewer. Electric service is provided by NSTAR ELECTRIC COMPANY. 1,188 properties have identified commercial activity — restaurants, retail, professional offices, and services that give Watertown its character.
Environmental note: Watertown has an average EPA lead paint indicator at the 55th percentile nationally, consistent with 976 properties built before 1900 when lead paint was standard. 1,706 properties exceed at least one EPA environmental justice threshold — a factor in lending compliance and environmental due diligence.
What Watertown Property Intelligence Means for Professionals
Insurance & Underwriting
Watertown's fire protection grade distribution (2,078 Grade A, 8,677 Grade B) directly affects premium calculation. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
Watertown's 10 property types, spanning construction from 1698 to present, require local market knowledge for accurate comparable selection and valuation. NEP assembles building characteristics, environmental exposure, and condition signals into a single property profile.
Real estate solutionsLending & Title
Collateral assessment requires flood zone verification, environmental screening, and ownership chain validation. NEP provides property-level compliance data from public records.
Lending solutionsInspection & Property Services
63,832 permits across 67% of properties means most Watertown inspection assignments can start with documented renovation and system history, not a blank slate.
Inspection solutionsExplore Watertown property intelligence.
10,865 Watertown properties — each with risk profiles, building data, permit history, and ownership analysis from 140+ sources. Open any property and see the full picture.
Newburyport, MA · Federalist · 3,524 sq ft · 4 bed / 3 bath · Built 1800 · Historic District
NEP Property Intelligence Summary
ConditionC1Fire ClassBFlood ZoneXOwnerIndividualOccupancyOwner-Occupied
Purchased2018 (8yr)Permits11 totalSystems3 updatedLiensClearAssessed$1.6MOcean0.3 mi
EraPre-1940HistoricDesignatedRenovationRecentRadonZone 1
Cite this data
Source: NE Provenance, “Professional Property Intelligence for New England,” neprovenance.com/insights/town/watertown-ma. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.