Standing in the Great Hall of Dundarave in the village of Bushmills, on the north Antrim coast, Sir Malcolm Macnaghten cuts a lonely figure. Under the stony gaze of stout marble busts and gilded portraits of ancestors, he is preparing the historic seat of the clan Macnaghten for sale.

The estate, close to the Giants Causeway, has been used as a summer residence since the 1920s and Sir Malcolm says it no longer has any practical place in the lives of the remaining family.

Originally built between 1846 and 1849 to a classical Georgian design by Sir Charles Lanyon, Dundarave was planned as an alternative residence to the nearby Bushmills House, which no longer stands.

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Off the vaulted vestibule entrance is the stunning Great Hall which was modelled on the Reform Club in London. Scaling the full height of the building a railed gallery landing tops marble-effect archways on each side of the perfect square. High above the decorative mantelpiece on Corinthian pillars, 20 cast-iron Doric columns support an ornate cupola pouring light down on the baronial hall. It’s certainly a departure from what you’d expect – even in the grandest of houses.

Childhood holidays

Though it is one of the largest privately owned estates in

Northern Ireland

, and the Republic for that matter, the house is not widely known. The first Macnaghten came from Scotland in the 16th century and served as secretary to the earls of Antrim, the O’Donnells. The lands they acquired included a large portion of the village of Bushmills, which the clan rebuilt in the late 1800s. Included in this sale through agents Savills is the 22,500sq ft house and 486 acres of land for £5 million (€6.2million).

Passed from generation to generation of Macnaghtens, who have long since settled in the UK, it is fondly recalled as a childhood holiday home.

Sir Malcolm remembers wreaking havoc racing bikes around the upstairs gallery when his grandmother was in residence. But Dundarave wasn’t always the first port of call for the Macnaghtens, who for many years opted instead for another slightly less grand Victorian Gothic property, closer to the sea at nearby Runkerry.

Renovation

Sir Charles Macnaghten undertook a major renovation of the house in 1910, when it was completely rewired and replumbed. But soon afterwards tragedy struck when he died, and his only two sons were subsequently killed during the Battle of the Somme.

Dundarave has not had full-time residents since the 1920s, though it has occasionally been used as a shooting lodge or for family events. Last year the estate hosted an open day, and Sir Malcolm met older residents of Bushmills who said it was their first time seeing the house, though they had family who had worked there for many years.

Despite its imposing basalt stone façade, Dundarave is a very liveable house crying out for new inhabitants. Off the Great Hall, the diningroom alone would fit a large three-bed semi – a two-storey at that. It interconnects through one and a half foot thick walls to the ballroom with its original marble mantelpiece and three huge Wyatt windows.

Intricate cornicework

Everywhere intricate cornicework, friezes and recessed panels decorate the original ceilings. The morningroom basks in sunshine and looks out along the avenue through original bay sash windows. This was the family drawingroom and by tradition each successive lady of the house decorated it to her own taste. Now Sir Malcolm has to figure out what to do with the furniture and art accumulated over the years which he says is too big and out of place to sit comfortably in the homes which he and his relatives now occupy.

Cobbled courtyard

Upstairs are seven main bedrooms off the galleried landing, three of which have separate dressing rooms. A further wing houses seven more bedrooms and two bathrooms. Accommodation is certainly not an issue here.

Outside is a most unusual cobbled semi-circular courtyard with outhouses, which leads up steps to the old farmyard and stables with its beautiful clock tower where a bell rang daily for lunch and at close of day.

There is a further manager’s house, a garden cottage and four lodges, including the original gate lodge, a Grade 1 listed building.

Though slightly forlorn, Dundarave could be used immediately as a residence. It’s clear from the polish on the wood floors, the working doorknobs, the gleaming hanging pots and pans in the scullery of the old kitchen that the small house staff that remain still take their work very seriously. They address Sir Malcolm as “Sir”. He looks a little uncomfortable with it all, though he enjoys the fine food served to him in the diningroom.

Tomorrow he will take an Easyjet flight back to his “other life” in England, with his job in IT and his more modest home south of London.