These records are a continuation of the Baltimore City Assessors' records described in RG. 4, Series 2 and the field assessors' workbooks in RG. 4, Series 3. The essential difference is that the sheets are standardized forms as opposed to the more informal nature of the other records. The records provide names of the owner and street; mailing address; location and description of the property with a lot number, house number, and size of lot; and the values of the lot, improvements, and exemptions. These records were maintained by the Appeal Tax Court and the Department of Assessments after 1934 (the Department of Assessments has been part of the state government since 1975).

Researchers using these records will need to know the ward, section, and block numbers of the property. This information can be obtained from the volumes of Real Estate Tax Assessments, published by the city government and by the Real Estate Index Bureau of Baltimore and its successors between 1928 and 1991. They are arranged by street address. See BRG4 Series 6.

There are assessment volumes for Baltimore and Anne Arundel Counties of the areas annexed to the city in 1918. These records are from Baltimore County Districts 1, 3, 9, and 12-15 for the years 1919-24 and Anne Arundel County Districts 3 and 5, 1919-23.

Microfilm of volumes from 1982-1987 is represented at the end of this series. 1985-1986 was not microfilmed.

There are also a number of assessment records for public service corporations.