Montana Parcel Earliest Build Year

Montana Parcel and Structures by Build Year The density of property development varies across time and space within the State of Montana. This map highlights areas developed recently and areas developed long ago. The Montana Department of Revenue (DOR) maintains property tax information for every parcel owned in the State of Montana. For property tax purposes, parcels are classified as residential, commercial, farmland, tax exempt and many more property types. The points on this map display the location of structures with parcel information from the property tax database. There is currently no way to identify the build year for individual structures. This requires that all structures within a parcel are assigned the same parcel information. This map is focused on parcels with buildings and includes Residential Dwellings, Commercial Buildings and Other Buildings. Two primary attributes in this point layer display different aspects of each parcel. 1. Earliest Build Year (YearBuiltMin) - The earliest year built for all residential dwellings and commercial buildings within a parcel. If a parcel has more than one building the earliest build year of any building in the parcel is assigned to YearBuiltMin. 2. Total Value - Total Building value plus Total Land value for each parcel. This is the assessed property tax value and not the market value of the property. Map compiled by Montana Department of Commerce. Property tax information from Montana Department of Revenue. Parcel boundaries, reservations, conservation easements, and public lands from Montana State Library. Imagery from ESRI. Tax Year: 2026 Last Updated: 8/12/2026