The demesne itself surrounds Eyrecourt Castle, a late seventeenth-century seat long associated with the Eyre family, who were among the Protestant landowners who consolidated holdings in Connacht following the Cromwellian and Williamite settlements. A demesne house of this period would typically have served the practical needs of a landed estate, whether as a secondary residence, a steward's quarters, or an earlier structure predating the grander castle that came to define the property.

Eyrecourt Castle is itself a building of some architectural note, considered one of the more intact examples of late seventeenth-century Anglo-Irish domestic architecture in Connacht, though it has suffered considerably from neglect over the decades since it fell out of use. The presence of a separately classified house within the same demesne suggests the estate was a more complex ensemble than a single landmark building, with ancillary structures reflecting the working and residential layers of a large rural property. Seventeenth-century estate buildings in Ireland often drew on English architectural fashions while adapting to local materials and conditions, and those that survive in any form offer a relatively rare window into how landed properties were organised and occupied in the decades following the upheavals of mid-century.