Sudbury, MA
Middlesex County42.3834°N, 71.4162°W
Tracking 7,263 properties across Sudbury, Massachusetts — a community where the median home dates to 1971 and the oldest to 1667. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
7,263
Properties Tracked
1971
Median Year Built
$931K
Median Assessed Value
4%
FEMA Flood Zone
2.10M
NEP Data Facts Tracked
Zone 1
Radon Zone
Click any parcel to view intelligence
Sudbury, MAInc. 1638
Sudbury is an affluent residential town west of Boston, known for its historic town center — anchored by the First Parish Church and the Wayside Inn, one of the oldest operating inns in America. The town's housing stock includes significant pre-Revolutionary homes in the center and along the old roads, extensive post-war suburban development in the 1950s-80s, and newer construction on the remaining buildable parcels.
The Sudbury River and its associated wetlands create flood zone exposure and environmental constraints across much of the town's eastern section. For property professionals, Sudbury is a high-value residential market with strong schools, large lots, and the kind of community character that sustains demand even in softer markets. The range of construction eras — from 1700s colonials to 2020s new builds — creates significant variation in building condition and systems that requires property-level assessment.
Risk Profile
FEMA flood zones, fire protection grades, radon — parcel by parcel
FEMA Flood Zones
306 properties (4%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
X
6,957
AE
297
A
9
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
14
Grade B
1,468
Grade C
5,435
Grade D
182
Grade E
164
Zone 1
Radon Risk
123 mph
Design Wind Speed
ASCE 7 standard
40 psf
Ground Snow Load
ASCE 7 standard
Relatively Low
FEMA Risk Index
NRI composite rating
The Property Landscape
7,263 properties · Median year built 1971 · Avg 2,757 sf
Property Types
Single Family
5,461
Condominium
609
Institutional
530
Vacant Land
355
Commercial
187
Multi-Family
35
Agricultural / Open Space
32
Mixed Use
29
Industrial
20
Residential Other
4
Construction by Era
Pre-1800
47
1800-1849
61
1850-1899
69
1900-1949
350
1950-1979
3,262
1980-1999
1,458
2000+
1,140
Architectural Styles
Colonial
3,002
Condominium
677
Cape Cod
544
Ranch
477
Split Level
440
Contemporary
326
Raised Ranch
282
Antique
160
Market Activity
Recorded transactions from Middlesex County Registry of Deeds
18
Sales (12 mo)
Arms-length transactions
$1.3M
Median Sale Price
Past 12 months
82%
Owner-Occupied
1%
Out-of-State Owners
NE Provenance tracks recorded deeds, mortgages, and liens for 100% of Sudbury 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
39,838 municipal building permits on file · 76% of properties
NE Provenance tracks 39,838 building permits across 5,550 Sudbury properties — 76% coverage. 3,791 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.
39,838
Permits on File
76%
Coverage
Properties with permits
3,791
Active (5yr)
Recent permit activity
88%
Condition Rated
NEP assessment
Living in Sudbury
Middlesex County · Massachusetts
Zip Codes0170101776
18,934
Population
2020 Census
7,263
Properties
$931K
Median Assessed
82%
Owner-Occupied
24.8
Square Miles
Sudbury covers 24.8 square miles in Middlesex County, Massachusetts. The median assessed property value is $931K.
Single-family homes account for 5,461 of Sudbury's 7,263 properties, with 609 condominiums. There are 187 commercial properties and 355 parcels of vacant land. About 82% of properties are owner-occupied.
Assessed values range widely — the middle 50% of properties fall between $693K and $1.3M, with the highest assessed property at $67.8M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most properties rely on private septic systems. Electric service is provided by NSTAR ELECTRIC COMPANY. 994 properties have identified commercial activity — restaurants, retail, professional offices, and services that give Sudbury its character. 312 properties have swimming pools.
What Sudbury Property Intelligence Means for Professionals
Insurance & Underwriting
Sudbury's fire protection grade distribution (14 Grade A, 1,468 Grade B) directly affects premium calculation. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
Sudbury's 10 property types, spanning construction from 1667 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. 4% of Sudbury properties are in SFHAs where flood insurance is a federal lending requirement. NEP provides property-level compliance data from public records.
Lending solutionsInspection & Property Services
39,838 permits across 76% of properties means most Sudbury inspection assignments can start with documented renovation and system history, not a blank slate.
Inspection solutionsExplore Sudbury property intelligence.
7,263 Sudbury 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/sudbury-ma. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.