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.Complete Help (PDF)Parcel Legend:Full Map LegendAbout this ViewerThis viewer displays land property boundaries from assessor parcel maps across Massachusetts. Each parcel is linked to selected descriptive information from assessor databases. Data for all 351 cities and towns are the standardized "Level 3" tax parcels served by MassGIS. More details ...Read about and download parcel dataUpdatesV 1.1: Added 'Layers' tab. (2018)V 1.2: Reformatted popup to use HTML table for columns and made address larger. (Jan 2019)V 1.3: Added 'Download Parcel Data by City/Town' option to list of layers. This box is checked off by default but when activated a user can identify anywhere and download data for that entire city/town, except Boston. (March 14, 2019)V 1.4: Data for Boston is included in the "Level 3" standardized parcels layer. (August 10, 2020)V 1.4 MassGIS, EOTSS 2021

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 June 24, 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.

City of Pittsfield, MA GIS Viewer

Download PDFs of Assessor's tax maps for Dedham, Massachusetts

Town of Rochester, MA GIS Viewer

City of Everett, MA GIS Maps - including PDFs

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

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

Status of Standardized (Level 3) Tax Map Maintenance in Massachusetts

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 Middleborough, MA GIS Viewer

This dataset contains point features representing the approximate location of tax parcels contained in County Assessor tax rolls. Individual county data was integrated into this statewide publication by the Arkansas Geographic Information Office (AGIO). The Computer Aided Mass Appraisal (CAMA) systems maintained in each county are used to populate the database attributes for each centroid feature. The entity attribute structure conforms to the Arkansas Cadastral Mapping Standard. The digital cadastral data is provided as a publication version that only represents a snapshot of the production data at the time it was received from the county. Published updates may be made to counties throughout the year. These will occur after new data is digitized or updates to existing data are finished. Production versions of the data exist in the various counties where daily and weekly updates occur. Users should consult the BEGIN_DATE attribute column to determine the age of the data for a given county. This column reflects the date when AGIO received the data from the county. Only parcels with an associated Computer Assisted Mass Appraisal (CAMA) record are provided. This means a CAMA record may exist, but no point geometry or vice-versa. Cadastral data is dynamic by its nature; therefore it is impossible for any county to ever be considered complete. The data is NOT topologically enforced. As a statewide integrator, AGIO publishes the data but does not make judgment calls about where points or polygon lines are meant to be located. Therefore each county data set is published without topology rules being enforced. GIS Technicians use best practices such as polygon closure and vertex snapping, however, topology is not built for each county. Users should be aware, by Arkansas Law (15-21-504 2 B) digital cadastral data does not represent legal property boundary descriptions, nor is it suitable for boundary determination of the individual parcels included in the cadastre. Users requiring a boundary determination should consult an Arkansas Registered Land Surveyor (http://www.arkansas.gov/pels/search/search.php) on boundary questions. The digital cadastral data is intended to be a graphical representation of the tax parcel only. Just because a county is listed does NOT imply the data represents county wide coverage. AGIO worked with each county to determine a level of production that warranted the data was ready to be published. For example, in some counties only the north part of the county was covered or in other cases only rural parcels are covered and yet in others only urban parcels. The approach is to begin incremental publishing as production blocks are ready, even though a county may not have county wide coverage. Each case represents a significant amount of data that will be useful immediately. Users should consult the BEGIN_DATE attribute column to determine the age of the data for a given county. This date reflects when the data was received from the county. Digital cadastral data users should be aware the County Assessor Mapping Program adopted a phased approach for developing cadastral data. Phase One includes the production of a parcel centroid for each parcel that bears the attributes prescribed by the state cadastral mapping standard. Phase Two includes the production of parcel polygon geometry and bears the standard attributes. The Arkansas standard closely mirrors the federal Cadastral Core Data Standard established by the Federal Geographic Data Committee, Subcommittee for Cadastral Data. Counties within this file include: Arkansas, Ashley, Baxter, Boone, Carroll, Chicot, Clark, Clay, Columbia, Conway, Craighead, Crawford, Cross, Desha, Faulkner, Franklin, Hot Spring, Howard, Izard, Jackson, Jefferson, Lafayette, Lincoln, Little River, Logan, Lonoke, Madison, Mississippi, Montgomery, Nevada, Newton, Perry, Pike, Poinsett, Polk, Pope, Pulaski, Randolph, Saline, Sebastian, Stone, Van Buren, Washington and White.

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.

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 Boylston, MA GIS Viewer

This layer contains polygons that split the City of Cambridge into 286 city blocks. Each block boundary is associated with an Assessors map, and a group of parcels. Each individual parcel has a map and lot associated to it. The 'map' refers to one of these blocks, the 'lot' is the tax parcel within the block. Explore all our data on the Cambridge GIS Data Dictionary.Attributes NameType DetailsDescription PCIX_NO type: Stringwidth: 6precision: 0 Block number

BSIZE_MAP_SCALE type: Integerwidth: 4precision: 10

BSIZE_INCH_TO_FOOT type: Integerwidth: 4precision: 10

DSIZE_MAP_SCALE type: Integerwidth: 4precision: 10

DSIZE_INCH_TO_FOOT type: Integerwidth: 4precision: 10

ROTATION type: Doublewidth: 8precision: 38

This dataset consists of tax parcels for Easton, Massachusetts. Tax parcels represent property boundaries for the purpose of tax assessment. Tax parcels are not an authoritative source of property boundaries. The authoritative record of property boundaries are recorded at the Bristol County Registry of Deeds. Only a professional land surveyor my produce a legally authoritative map of property boundaries.Assessor property values are for fiscal year 2025. Tax parcels include recorded plans and deeds through December 2023.Ownership information is updated the first Friday each month and may not reflect current ownership.This feature class contains redundant geometry in cases where there are multiple condominium units on a given tax parcel.