Both the Lombard Historical Society and the Lombard Historical Commission recognize suitable historic sites and buildings. There are three possible levels of designations for historic properties in Lombard.

"Historical Society" recognition is an honorary recognition of sites, people and architecture important to Lombard history. More than 30 historic homes, Lilacia Park, Maple Street Chapel and other sites in Lombard have Historical Society wooden recognition plaques. It carries no legal protection or restrictions for the property.

"Landmark" sites require the consent of their owner and formal application to the Historical Commission. Landmark recognition also requires Village board approval and provides legal status. This can give access to state and federal tax incentives and restoration aid. Landmark properties are protected against drastic changes, including demolition or major changes to the façade. Appeals to the restrictions can be made through the Village.

“National Register” status is designated through the State Historic Preservation Office in Springfield. There is no legal protection or restrictions for private property listed on the National Register, but projects using Federal or State funds are reviewed for adverse effects on Register sites and may be restricted. Maple Street Chapel is the only Lombard site currently on the National Register.

• The 60 year old Dairy Queen sign is one of only a few remaining “original” Dairy Queen signs. The Dairy Queen is at the southeast corner of Main and Maple.
• The Maple Street Chapel at the southwest corner of Main and Maple.
• The Sheldon Peck Homestead (355 E. Parkside), the pioneer home of a nationally-famous American portrait artist. More recently, the “hidden house” on Washington Street became a landmark.