
Tracking 180,510 properties across Boston, Massachusetts — a community where the median home dates to 1920 and the oldest to 1725. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
Boston is the capital of Massachusetts and the largest city in New England — a property market of extraordinary complexity spread across neighborhoods that function as distinct markets within a single municipality. From the brownstones of Back Bay and the South End to the triple-deckers of Dorchester and Roxbury, from the waterfront towers of the Seaport to the single-family homes of West Roxbury and Roslindale, Boston contains more property diversity in its 90 square miles than most states.
The city's geography — a harbor, a river, and neighborhoods built on filled tidal flats — creates environmental exposure that varies block by block. Coastal flood zones run through the Seaport, East Boston, and Charlestown. The older neighborhoods bring construction that ranges from pre-Revolutionary homes in the North End to the Victorian-era housing stock that dominates most residential areas. Boston's institutional presence — more than 30 colleges and universities, world-class hospitals — creates massive land use concentrations that affect surrounding property markets.
For property professionals, Boston requires parcel-level intelligence by definition. A condo in the Back Bay and a triple-decker in Mattapan are both "Boston residential properties," but they exist in different markets with different risk profiles, different buyer pools, and different regulatory environments. ZIP-code or city-level generalizations are meaningless in a city where assessed values can vary by a factor of 50 within a single neighborhood.
FEMA flood zones, fire protection grades, radon, coastal exposure, storm surge — parcel by parcel
9,225 properties (5%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
Fire protection grades reflect proximity to fire stations and hydrant infrastructure. Grade affects insurance pricing in every New England state.
5,802 properties (3%) are within 3 miles of the ocean. 7,768 are classified as waterfront. The closest property is 133 ft from the coastline.
180,510 properties · Median year built 1920 · Avg 7,505 sf
378,773 municipal building permits on file · 32% of properties
NE Provenance tracks 378,773 building permits across 57,145 Boston properties — 32% coverage. 30,958 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.
Suffolk County · Massachusetts
Boston covers 50.0 square miles in Suffolk County, Massachusetts. The median assessed property value is $613K.
Single-family homes account for 35,299 of Boston's 180,510 properties, with 88,684 condominiums and 19,621 multi-family buildings. There are 6,044 commercial properties and 328 parcels of vacant land. About 57% of properties are owner-occupied, and 4% are owned by someone out of state.
Assessed values range widely — the middle 50% of properties fall between $382K and $917K, with the highest assessed property at $2143.1M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most of Boston (99%) is on municipal sewer. Electric service is provided by NSTAR ELECTRIC COMPANY. 10,973 properties have identified commercial activity — restaurants, retail, professional offices, and services that give Boston its character.
Environmental note: Boston has an average EPA lead paint indicator at the 64th percentile nationally, consistent with 32,861 properties built before 1900 when lead paint was standard. 116,016 properties exceed at least one EPA environmental justice threshold — a factor in lending compliance and environmental due diligence.
With 5% of properties in FEMA flood zones and 3% in the coastal zone, Boston concentrates several major underwriting variables. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsBoston's 10 property types, spanning construction from 1725 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 solutionsCollateral assessment requires flood zone verification, environmental screening, and ownership chain validation. 5% of Boston properties are in SFHAs where flood insurance is a federal lending requirement. NEP provides property-level compliance data from public records.
Lending solutions378,773 permits across 32% of properties means most Boston inspection assignments can start with documented renovation and system history, not a blank slate.
Inspection solutions180,510 Boston properties — each with risk profiles, building data, permit history, and ownership analysis from 140+ sources. Open any property and see the full picture.

Source: NE Provenance, “Professional Property Intelligence for New England,” neprovenance.com/insights/town/boston-ma. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.