The choir and the high chapel were built between 1451 and 1454, with the nave and the oratory between 1460 and 1464.

Together with the Château de Montsoreau (1453) and the Palais Jacques-Cœur (1451), Châteaudun's 15th-century additions are among the earliest examples of residences built essentially for leisure in France.

François I of Orléans-Longueville[3] began construction of the north wing (the "aile Longueville") between 1469 and 1491.

The upper floors were added by François II d'Orléans-Longueville and his descendants during the first quarter of the 16th century.

Converted by Jean de Dunois during the early Renaissance into a comfortable residence, the main body of the building is roofed in the gothic style.