An Coimisiún Pleanála has refused permission for the planned restoration of Dalyston House in Kylebrack, Loughrea.
The home, built in the 1700s, is currently in a state of disrepair and is listed as a protected structure.
According to a report contained in the planning file, Dalyston House was built in the mid-1700s and later became the seat of Charles O'Farrell.
In 1906, it was valued at £50, in the 1960s it was stripped of its fittings, and today, it's a ruin.
But owner Flan Frawley is planning to rebuild it based on historical photos and records, and the project was initially approved by county planners last year.
There was a large number of local submissions, with many raising concerns over alleged unauthorised work that had been going on for years.
Also noted by many was the apparent "ambiguity" whether the development is domestic or commercial.
Two locals took an appeal to An Coimisiún Pleanála, which has now refused permission.
They held it was not demonstrated that Dalyston House would be redeveloped in such a way that would ensure an authentic reconstruction that would protect, conserve, and enhance the ruin.
