If and when additional income is needed for maintenance and/or support of the library building, a portion of it may be rented to a suitable tenant. Alternatively, a room could be provided at no charge as a gesture of good will (ie.- as a museum space for the Historical Preservation Committee or like organization).
Sec. 420-a A public library is wholly exempt from taxation if in fact the rental income derived from the rental portion of the library building is necessary for and actually applied to the maintenance and support of the library (9 Op. Compt. 238 #6222, June 15, 1953). Pg. 124 NYS Public Library Law