On July 14, 1789 the Revolution occurred, a little less than two months after the publication of the advertisement of setting on sale of the field, before a purchaser had presented himself, and prevented the realization of this project.

In 1792, the castle in major part was unfurnished. The marquis de Roquelaure finishes on the scaffold in 1794, and its widow Marie Louise de Houchin died in 1797, having forsaken the castle of Kergroadez, which was put under sequestration on September 9, 1798 (23 fructidor year 7) by decree of the department of Finistere, at a rate of the inscription on the list of the emigrants of part of the heirs to fire sior to Roquelaure.

Not to leave with the plunderers the benefit these materials, the direction of the Recording of the Field made carry out systematic demounting leads of roof and their storage in sure place. This organized taking away degraded the slate covers, which also had they to be the subject of recovery. The penetration of rain water started to attack the floors of stage.

The sales of State-owned furniture took place in 1807: frames, beams and windows and even the stoup of the vault

The sequestration on the ruined castle from now on will be raised only in 1809, but as of before this date, the procedures of succession were in hand between the heirs to the last lords of Kergroadez.

The single direct heir to Marie Louise de Houchin and Francois, marquis de Roquelaure, having died minor in 1799, the succession was divided after liquidation in 1829 between Therese Sirey, the natural sister of the marchioness of Houchin and the niece of the marquis de Roquelaure.

It is with the latter, Marie Julie de Bessuejouls de Roquelaure, then widowed without children, that échut the share in which was included the castle and the major part of the grounds of Kergroadez. To its death in 1835, this good passed to his/her small-niece Jeanne Olympe de Mealet of Fargues, marries of Guillaume de Cassagne of Beaufort, says Mr. de Miramon; these owners rather attached to the western south of France preserved this heritage like field of report/ratio managed remotely until 1860.