Seamless Property Mapping Across the State
The Massachusetts Interactive Property Map, developed by MassGIS, enables developers, banks, realtors, businesses, and homeowners to view seamless property and tax information across the Commonwealth.
One of a handful of such state-sponsored tools in the country, the ongoing effort is the product of MassGIS working with community assessors, their mapping consultants, and other stakeholders. 1
You can use the map to:
- Type an address or a place to zoom to that location.
- Click on the parcel to view property valuations.
- Draw a line between points
- Measure the distance in miles, feet, yards, meters, kilometers, nautical miles
- Click the “Basemap” button to change the background map.
- Aerial photography is available from several years, as are USGS Topo maps and others.
- Draw a shape to measure a location, region, or land segment
- Show measurements in U.S. or metric units
Using the Interactive Map
Non-Map Property Information
The assessment data are also available in accessible format in the Property Information Finder, which meets 508 Compliance Requirements and allows you to search for property assessment data by address only. It does not include a map or the other features provided by the Interactive Property Map.
1 Parcel Mapping
For full details about the statewide parcel mapping project and to download these free data for use in GIS software, see
- MassGIS Standard for Digital Parcels and Related Data Sets
- MassGIS Data - Level 3 Assessors’ Parcel Mapping
2 Property Assessments
MassGIS attempts to display annual updates of property information for each community. This, however, requires all communities to maintain and submit standardized assessor maps and assessor information. Until this effort is fully implemented, some of the assessor data may not be entirely current. The fiscal year of the information is displayed in a pop-up when you click a particular parcel.
The most up-to-date assessing information is available directly from each municipality, typically through the assessing department. Many municipal web sites have an online property lookup feature, usually on the assessor's page.
3 Data Sources
The Massachusetts Property Information viewer displays property boundaries from assessor parcel maps for all communities in the Commonwealth. Each parcel is linked to selected descriptive information from the assessor database.
- Data for Boston are being served in a web service hosted by the city
- Data for all other communities are being served from MassGIS' ArcGIS Online organizational account in a tiled web service that includes the standardized MassGIS Data - Level 3 Assessors’ Parcel Mapping.
4 Property Boundaries
Assessor’s parcel mapping is a representation of property boundaries, not an authoritative source.
- The authoritative record of property boundaries is recorded at the registries of deeds.
- A legally authoritative map of property boundaries can only be produced by a professional land surveyor.