Penobscot County Assessor

Find Penobscot County Maine assessor, assessment, auditor's, and appraiser's office, revenue commissions, GIS, and tax equalization departments. Assessors provide information on property and land tax assessment, property listings, values, valuations, property search, and records.


Old Town Assessor 53 Brunswick Street Old Town ME 04468 207-827-6148


Orono Assessor 59 Main Street Orono ME 04473 207-866-5050

Orrington Assessor 29 Center Drive Orrington ME 04474 207-825-3745

Penobscot County Registry Of Deeds 97 Hammond Street Bangor ME 04401 207-942-8797

What is an Assessor?

An assessor determines the values of properties in a local jurisdiction, such as a county or state. This assessment is then used to determine the taxable value of each property and the corresponding property tax amount. An assessor works with an auditor's office or local revenue commission to determine real estate and property value increases and decreases. The department may work with an appraiser's office on new construction projects to produce property and land tax assessments.

Assessors use a variety of GIS maps and tax equalization tools to determine valuations within their specific boundaries. The assessor determines which properties are exempt from property taxes and ensures that taxpayers aren't overburdened, as well as ensuring that properties aren't undervalued or overvalued. Assessors may provide valuable information for related property searches.