[1] The present structure is a south-facing multi-bay mansion, originally dating from the 17th century, but remodelled and extended in 1820 in the Elizabethan style.

To the north an office wing incorporates the 17th-century portion, and to the south and west is a large domed conservatory, the orangery, designed by William Burn in about the 1850s.

[2] The house sits within a large landscaped demesne which features a pair of 550-foot long parallel reflecting pools on the south lawn.

Later, in 1539, after vigorously supporting King Henry VIII's efforts to break with Rome and the Dissolution of the Monasteries, Brabazon secured the ownership of the Abbey of St. Thomas, Dublin, whose lands included Killruddery.

The result was a large building, featuring a North-facing entrance with a cupola, behind which clustered a number of wings forming an irregular quadrangle around a central courtyard.

[9] The property is managed as a working farm with a variety of enterprises to earn the funds to maintain the estate and provide a living.

They operate tours, events, sports, horse riding, festivals, concerts, filming location rentals, farmers market, cafe, and weddings.