MassGIS' standardized assessors’ parcel mapping data set contains property (land lot) boundaries and database information from each community's assessor.The data were developed through a competitive procurement funded by MassGIS. Each community in the Commonwealth was bid on by one or more vendors and the unit of work awarded was a city or town. The specification for this work was Level 3 of the MassGIS Digital Parcel Standard.This feature service contains three feature classes and one table.Map service also available.See the datalayer page for full details.

To access parcel information:Enter an address or zoom in by using the +/- tools or your mouse scroll wheel. Parcels will draw when zoomed in.Click on a parcel to display a popup with information about that parcel.Click the "Basemap" button to display background aerial imagery.From the "Layers" button you can turn map features on and off. Check on 'Download Parcel Data by City/Town' and click in the map for links to download all parcel data for that municipality.Complete Help (PDF)Parcel Legend:Full Map LegendAbout this ViewerThe map displays land property boundaries from assessor parcel maps across Massachusetts. Parcel information is from local assessor databases. More...Read about and download parcel dataAlso available: an accessible, non-map-based Property Information FinderDISCLAIMER: 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.V 1.4 MassGIS, EOTSS 2021

MassGIS' standardized ("Level 3") property tax parcel mapping data set was developed through a competitive procurement funded by MassGIS. Each community in the Commonwealth was bid on by one or more vendors and the unit of work awarded was a city or town. The specification for this work was Level 3 of the MassGIS Digital Parcel Standard. Standardization of assessor parcel mapping is complete for all 351 Massachusetts' cities and towns. MassGIS is now incorporating updates from municipalities into the database. This hosted feature layer is exported from MassGIS' internal database of the feature class GISDATA.L3_TAXPAR_POLY_ASSESS, which links L3_TAXPAR_POLY and L3_ASSESS. The export includes the expression: (POLY_TYPE IN ('FEE', 'TAX')) OR (POLY_TYPE IN ('ROW', 'PRIV_ROW', 'RAIL_ROW', 'WATER') AND PROP_ID IS NOT NULL) It contains several fields from GISDATA.L3_ASSESS and stacked polygons where multiple assessor records link to a parcel. It contains features that do not have an associated record in GISDATA.L3_ASSESS, except for rights of way and water bodies. ROWs and water bodies with a non-null PROP_ID are included. The data in this feature layer is used for the popups in the Massachusetts Interactive Property Map. See full data descriptionA hosted tile layer will draw very quickly at map scale of 1:18,056 (level 15) to 1:564 (level 20).

This map service contains the Property Tax Parcel Mapping from MassGIS. The data are cached and stored as a tiled map service (levels 15-20) at ArcGIS Online for fast display.

This tile cache was last updated on May 1, 2025.

MassGIS' standardized "Level 3" assessors’ parcel mapping data set contains property (land lot) boundaries and database information from each community's assessor.

The data were developed through a competitive procurement funded by MassGIS. Each community in the Commonwealth was bid on by one or more vendors and the unit of work awarded was a city or town. The specification for this work was Level 3 of the MassGIS Digital Parcel Standard. Standardized data are available for all of Massachusetts' 351 cities and towns.

MassGIS is continuing the project, updating parcel data provided by municipalities. See the L3 Parcel Fiscal Year Status Map.To query the parcels, use the hosted feature layer.

The Danvers, MA - GIS provides the general public and other interested parties local government property tax and assessment information.

Town of Boylston, MA GIS Viewer

City of Everett, MA GIS Maps - including PDFs

The digital parcel data in this data layer were provided to MassGIS by communities, or their regional planning agency partners, that received parcel grants from MassGIS in 2002 and 2006. Each municipality's parcels found in this data set were provided to MassGIS separately and then appended together to form this single data layer. Most of the parcel data included in this data layer has not been updated since it was received by MassGIS in 2002/2003 and 2006. This data layer is under development. At the present time data are available for only 45 municipalities. The grant recipients were required to deliver digital parcel data complying with "Level II" of the MassGIS Standard for Digital Parcels and Related Data Sets. The data submitted by grant recipients were subjected to a rigorous quality assurance process to ensure compliance with the standard. The standard establishes requirements for how parcel boundaries are compiled. It also requires establishing a few attributes of the polygons that are unique to the standard. In addition, the standard requires that a minimum selection of information from the assessor's database be included in a separate database table that can be linked to the parcel polygons. At Level II of the standard, an "intersection table" is required, which makes it possible to correctly model the one-to-many and many-to-many relationships that exist between assessor map polygons and assessor databases. In ArcSDE. MassGIS stores the polygons as ASSESSPAR_POLY. The intersection table is named ASSESSPAR_POLY_INT and the database table is named ASSESSPAR_POLY_DATA.

Town of Rehoboth, MA GIS Viewer

Polygon feature class representing the City of Somerville, Massachusetts zoning map adopted December 12, 2019 as part of the City of Somerville Zoning Overhaul (https://www.somervillezoning.com/). Last amended by City Council December 12, 2024 per Ordinance 2024-16. This dataset last updated April 4, 2025.

Town of Middleborough, MA GIS Viewer

Data source is the Office of Tax and Revenue’s Computer-Assisted Mass Appraisal (CAMA) system. The CAMA system is used by the Assessment Division (AD) within the Real Property Tax Administration to value real estate for ad valorem real property tax purposes.The intent of this data is to provide a sale history for active properties listed among the District of Columbia’s real property tax assessment roll. This data is updated daily. The AD constantly maintains sale data, adding new data and updating existing data. Daily updates represent a “snapshot” at the time the data was extracted from the CAMA system, and data is always subject to change.

Town of Westminster, MA GIS Viewer

This polygon layer contains all of the property parcels in Cambridge. Each parcel has a unique Map and Lot ID number that links it to a record in the Assessing Department's Vision database system. Created for internal use by the Assessing Department to provide a visual reference associated with each parcel in the CAMA database. Created for interdepartmental and external use as part of the web viewers on the City's website. Also created for addressing/geocoding needs, although the Buildings and Master Address List are currently more accurate than Parcels. NOTE: The Parcels GIS data layer is NOT used by Assessing to calculate land area or taxes. Assessors refer to actual deeds or plans accepted by the Massachusetts Land Court. The figures stored in the GIS data layer are for general reference purposes only.

For more information and download links see: https://www.cambridgema.gov/GIS/gisdatadictionary/Assessing

Town of Warren, MA GIS Viewer

City of Somerville, MA GIS Viewer

This layer package contains GIS data in Esri File Geodatabase format, compatible with ArcGIS for Desktop 10.0 and higher. This data is also available for download as a zip archive in shapefile format. Amherst, MA Zoning Map Layers as of June, 2014. For zoning bylaw information, please consult http://www.amherstma.gov/index.aspx?nid=476

City of Quincy, MA GIS Viewer

To be used for reference by Brookline Planning & Community Development Department staff. Purpose of creating map was to gather all basic information necessary for zoning case review into one place. May not have the most up-to-date information so use with caution.

The protected and recreational open space datalayer contains conservation lands and outdoor recreational facilities in Massachusetts. The associated database contains relevant information about each parcel, including ownership, level of protection, public accessibility, assessor’s map and lot numbers, and related legal interests held on the land, including conservation restrictions. Conservation and outdoor recreational facilities owned by federal, state, county, municipal, and nonprofit enterprises are included in this datalayer. Not all lands in this layer are protected in perpetuity, though nearly all have at least some level of protection.

Although the initial data collection effort for this data layer has been completed, open space changes continually and this data layer is therefore considered to be under development. Additionally, due to the collaborative nature of this data collection effort, the accuracy and completeness of open space data varies across the state’s municipalities. Attributes, while comprehensive in scope, may be incomplete for many parcels.

The OpenSpace dataset includes two feature classes:

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this layer: Protected and Recreational OpenSpace Polygons - polygons of recreational and conservation lands as described above

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a sister layer: Protected and Recreational OpenSpace Boundaries (arcs) - attributed lines that represent boundaries of the polygons

The following types of land are included in the polygon datalayer:

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conservation land- habitat protection with minimal recreation, such as walking trails

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recreation land- outdoor facilities such as town parks, commons, playing fields, school fields, golf courses, bike paths, scout camps, and fish and game clubs. These may be privately or publicly owned facilities.

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town forests

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parkways - green buffers along roads, if they are a recognized conservation resource

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agricultural land- land protected under an Agricultural Preservation Restriction (APR) and administered by the state Department of Agricultural Resources (DAR, formerly the Dept. of Food and Agriculture (DFA))

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aquifer protection land - not zoning overlay districts

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watershed protection land - not zoning overlay districts

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cemeteries - if a recognized conservation or recreation resource

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forest land -- if designated as a Forest Legacy AreaMore information, including details for attribute codes, is available at the MassGIS metadata page for OpenSpace.