REDDICK MANSION AND GARDENS MANSION TOURS: FRIDAY-MONDAY | 11AM & 1PM OT ne of the most expensive and ornate private homes in the Midwest when completed in 1858, the Mansion was built by businessman, politician, and philanthropist William Reddick. Home to the Reddick family for nearly 30 years, the mansion anchors Washington Square, site of the first Lincoln-Douglas debate. This ornate 22-room mansion is open for tours. Tours are offered at 11 am and 1 pm. PLEASE CALL FOR OTHER ARRANGEMENTS & GROUP TOURS JOIN US FOR OUR ANNUAL GOLF OUTING, SAT. JUNE 10TH, PINE HILLS GOLF CLUB, OTTAWA, IL. VISIT OUR WEBSITE FOR OTHER EVENTS. 100 WEST LAFAYETTE ST. | OTTAWA, IL 61350 815-433-6100 | REDDICKMANSION.ORG REDDICK MANSION AND GARDENS MANSION TOURS : FRIDAY - MONDAY | 11AM & 1PM OT ne of the most expensive and ornate private homes in the Midwest when completed in 1858 , the Mansion was built by businessman , politician , and philanthropist William Reddick . Home to the Reddick family for nearly 30 years , the mansion anchors Washington Square , site of the first Lincoln - Douglas debate . This ornate 22 - room mansion is open for tours . Tours are offered at 11 am and 1 pm . PLEASE CALL FOR OTHER ARRANGEMENTS & GROUP TOURS JOIN US FOR OUR ANNUAL GOLF OUTING , SAT . JUNE 10TH , PINE HILLS GOLF CLUB , OTTAWA , IL . VISIT OUR WEBSITE FOR OTHER EVENTS . 100 WEST LAFAYETTE ST . | OTTAWA , IL 61350 815-433-6100 | REDDICKMANSION.ORG