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.

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).

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

ESRI file geodatabase and shapefile polygon feature class representing City of Somerville, Massachusetts fiscal year 2021 Assessor's parcels. These datasets comply with the MassGIS Level 3 Standard for property tax parcels and are the same datasets available for download from MassGIS.

For more information on the MassGIS Property Tax Parcel Standard please see: https://www.mass.gov/info-details/massgis-data-property-tax-parcels

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

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.

This is the data set of residential sales used by the Cook County Assessor in their Computer Assisted Mass Appraisal system used to assess residential property values. This data set contains property information for every arm's-length residential sale in Cook County where class is within a specified list of classes. For disclaimers, see data set narrative at https://datacatalog.cookcountyil.gov/stories/s/p2kt-hk36 This data set was replaced by the more comprehensive data set Cook County Assessor's Sales.

This is the data set of residential sales used by the Cook County Assessor in their Computer Assisted Mass Appraisal system used to assess residential property values. This data set contains property information for every arm's-length residential sale in Cook County where class is within a specified list of classes. For disclaimers, see data set narrative at https://datacatalog.cookcountyil.gov/stories/s/p2kt-hk36 This data set was replaced by the more comprehensive data set Cook County Assessor's Sales.

Town of Rochester, MA GIS Viewer

Gives property, or parcel, ownership together with value information, which ensures fair assessment of Boston taxable and non-taxable property of all types and classifications. To preserve their integrity, the identifiers PID, CM_ID, GIS_ID, ZIPCODE, and MAIL_ZIPCODE all are marked with an underscore ("_") as the last character.

Year-specific documentation for the FY2008 through FY2013 files is not currently available, but the format of those files is equivalent to that described in the FY2014 documentation.

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 map service contains three feature classes and one table.Feature service also available.See the datalayer page for full details.

The State Department of Revenue (DOR) has approves assessed values each fiscal year for the Somerville Board of Assessors. The assessed values and data presented reflects information available for the FY 2014-2018 actual tax bills issued January 1 of each year. Assessments for each fiscal year have an effective market date of January 1 of the preceding year.

Note that ownership information shows record owner as of January 1. However, a second line of ownership, if applicable, showing "S/O" indicates a subsequent owner who purchased the property after January 1 but prior to the following assessment. In this instance, title information including sale price, sale date, and book & page will not appear in the data base until next year.

As of February 14, 2020 this dataset will be considered archived information and will no longer be updated. First-pass property values as assessed by the Cook County Assessor in their Computer Assisted Mass Appraisal system used to assess residential properties. This dataset contains first pass values for 2019 and corresponds with residential PINs in the Cook County Assessor's Assessment Data. These are NOT final assessed values. For Disclaimers, see dataset narrative at https://datacatalog.cookcountyil.gov/stories/s/p2kt-hk36

Assessment dataset used by the Cook County Assessor in their Computer Assisted Mass Appraisal (CAMA) system used to assess residential properties in Northern Triennial Townships. This dataset contains property information for every residential PIN in the northern triennial townships where class is within a specified list of classes. For disclaimers, see dataset narrative at https://datacatalog.cookcountyil.gov/stories/s/p2kt-hk36

Explore the historical Whois records related to ma-assessors.com (Domain). Get insights into ownership history and changes over time.

Town of Seekonk, MA GIS Viewer

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

Extract of Cambridge Assessing Department on-line property database file for the most recently released fiscal year. Contains residential, condo, commercial and exempt data. Please refer to Cambridge's property database website for official assessment data: https://www.cambridgema.gov/propertydatabaseThis Feature Service will be updated annually with the latest fiscal year's data.The following fields are contained in the property database table.Field NameDescriptionPIDInternal Unique Parcel IDGISIDLink to ML in GIS Parcels layerBldgNumBuilding Number on ParcelAddressParcel AddressUnitUnit NumberStateClassCodeState Classification CodePropertyClassClassification Code descriptionZoningZoning (Unofficial)Map/LotAssessor's Map and Lot IDLandAreaLand area in square feetYearOfAssessmentFiscal Year of Assessment for this recordTaxDistrictDistrict for valuation groupingResidentialExemptionReceiving Residential exemption for fiscal yearBuildingValueAssessed value of building improvements on the parcelLandValueAssessed value of land on the parcelAssessedValueTotal assessed valueSalePricePrice listed for last deed transfer for the parcelBook/PageBook and Page number from the registry of deeds for last deed transactionSaleDateDate of last deed transactionPreviousAssessedValueTotal assessed value for the prior fiscal yearOwner_NameName of owner of record for the date of assessmentOwner_CoOwnerNameName of co-owner of record for the date of assessmentOwner_AddressAddress of owner of record for the date of assessmentOwner_Address2Second line of address of owner of record for the date of assessmentOwner_CityCity of owner of record for the date of assessmentOwner_StateState of owner of record for the date of assessmentOwner_ZipZip code of owner of record for the date of assessmentExterior_StyleBuilding style descriptionExterior_occupancyBuilding occupany, or use, type descriptionExterior_NumStoriesNumber of stories for the buildingExterior_WallTypeExterior wall material descriptionExterior_WallHeightAverage height of floors in a commercial or apartment buildingExterior_RoofTypeRoof structure descriptionExterior_RoofMaterialRoof material descriptionExterior_FloorLocationFloor level for condominium unitsExterior_ViewView quality rating for condominiumsInterior_LivingAreaFinished area of buildingInterior_NumUnitsNumber of units in a commercial or apartment buildingInterior_TotalRoomsTotal number of rooms in a condominium or residential buildingInterior_BedroomsTotal number of bedrooms in a condominium or residetential buildingInterior_KitchensKitchen description in condominium unitInterior_FullBathsCount of full bathrooms in a condominium unit or residential buildingInterior_HalfBathsCount of half bathrooms in a condominium unit or residential buildingInterior_FireplacesCount of fireplaces in residential buildingsInterior_FlooringDescription of primary floor cover materialInterior_LayoutLayout description for condominium unitInterior_LaundryInUnitYes or No flag for in unit laundry for condominiumSystems_HeatTypeHeat system type descriptionSystems_HeatFuelHeat fuel type descriptionSystems_CentralAirCentral air conditioning system indicatorSystems_PlumbingRating of plumbing system for commercial buildingCondition_YearBuiltActual year built of buildingCondition_InteriorConditionDescription of interior condition of residential buildingCondition_OverallConditionDescription of overall condition of buildingCondition_OverallGradeDescription of overall grade of buildingParking_OpenNumber of open parking spaces for residential building or condominium unitParking_CoveredNumber of covered parking spaces for residential building or condominium unitParking_GarageNumber of garage parking spaces for residential building or condominium unitUnfinishedBasementGrossUnfinished basement areaFinishedBasementGrossFinished basement area

Land, building, and total assessed values for all Cook County parcels, from 1999 to present. The Assessor's Office uses these values for reporting, evaluating assessment performance over time, and research. When working with Parcel Index Numbers (PINs) make sure to zero-pad them to 14 digits. Some datasets may lose leading zeros for PINs when downloaded. This data is parcel-level. Each row contains the assessed values for a single PIN for a single year. Important notes:Assessed values are available in three stages: 1) mailed, these are the initial values estimated by the Assessor's Office and mailed to taxpayers. 2) certified, these are values after the Assessor's Office closes appeals. 3) Board of Review certified, these are values after the Board of Review closes appeals. The values in this data are assessed values, NOT market values. Assessed values must be adjusted by their level of assessment to arrive at market value. Note that levels of assessment have changed throughout the time period covered by this data set. This data set will be updated roughly contemporaneously (monthly) with the Assessor's website as values are mailed and certified. However, note that there may be small discrepancies between the Assessor's site and this data set, as each pulls from a slightly different system. If you find a discrepancy, please email the Data Department using the contact link below. This dataset contains data for the current tax year, which may not yet be complete or final. Assessed values for any given year are subject to change until review and certification of values by the Cook County Board of Review, though there are a few rare circumstances where values may change for the current or past years after that. Rowcount for a given year is final once the Assessor has certified the assessment roll all townships. Current property class codes, their levels of assessment, and descriptions can be found on the Assessor's website. Note that class codes details can change across time.For more information on the sourcing of attached data and the preparation of this dataset, see the Assessor's Standard Operating Procedures for Open Data on GitHub. Read about the Assessor's 2025 Open Data Refresh.

City of Pittsfield, MA GIS Viewer