This 900-Year-Old Castle Is the Priciest Home Ever Listed for Sale in Luxembourg
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This 900-Year-Old Castle Is the Priciest Home Ever Listed for Sale in Luxembourg

Château d’Ansembourg and the adjacent Domaine du Presbytère d’Ansembourg are on the market for €37.5 Million 

By Liz Lucking
Fri, Jun 12, 2026 12:11pmGrey Clock < 1 min
An almost 900-year-old castle in Luxembourg has hit the market for €37.5 million (US$43.3 million), making it the most expensive residential property ever offered for sale in the small European country.

The listing comprises the ancient Château d’Ansembourg and the adjacent Domaine du Presbytère d’Ansembourg, which are within central Luxembourg’s Valley of the Seven Castles.

Château d’Ansembourg is one of the seven castles the valley is named for and is regarded as one of the country’s most important privately owned châteaus, according to Ignace Meuwissen, the founder of Whisper Auctions, who is handling the sale.

The castle sits at the heart of an almost 500-acre estate overlooking the picturesque village of Ansembourg, and records of its existence date to 1135.

Domaine du Presbytère d’Ansembourg, meanwhile, is a more than 110-acre estate comprising a former presbytery, a chapel dating to 1678, a historic school site, forests and meadows.

“Properties of this calibre rarely become available,” Meuwissen said.

“What is being offered today is far more than a chateau. The combination of nearly nine centuries of documented history, 245 hectares of land and a unique location in the Valley of the Seven Castles creates an opportunity that is exceptionally rare within Europe. Opportunities of this scale and heritage value are seldom brought to market and are often preserved within families for generations.”

The properties are being marketed through a “semi-off-market sales process,” with limited information and marketing materials publicly available, and access to the properties is reserved for a small number of pre-qualified candidates, according to Meuwissen.

Both estates have been privately occupied by the same owner, whom Meuwissen declined to identify. Mansion Global could not confirm who the seller is.



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Luxury in Bellevue Hill has traditionally been measured through land, elevation and harbour outlooks. At Ōtium, a boutique residential development taking shape at 206B Victoria Road, the defining quality is quieter: a sense of separation from the city without leaving Sydney’s eastern suburbs.

Positioned above Cooper Park, the development turns away from the movement of Victoria Road and towards the reserve’s dense green canopy. Its north-western rear orientation has been designed to capture natural light, parkland views and the Sydney skyline beyond.

The result is a collection of residences conceived around privacy, space and a close connection with the surrounding landscape.

Award-winning architecture practice MHN Design Union has designed the building, using its elevated setting to establish a distinctly different outlook from many of Bellevue Hill’s apartment developments. Rather than treating the park as a distant backdrop, the architecture draws it into the residences through broad openings, private terraces and living spaces oriented towards the trees.

The Victoria Road elevation uses brickwork to give the building a grounded, enduring street presence. To the rear, the architecture becomes more open, with the residences extending towards private outdoor areas overlooking Cooper Park.

Inside, Ennen & Co has developed a warm and restrained material palette influenced by the building’s architectural forms and natural setting. Clean lines are offset by stronger moments of colour and texture, including deep green tiling, natural stone, marble and bespoke joinery.

The approach is deliberately understated. Instead of relying on conspicuous finishes, the interiors have been designed as a flexible backdrop for furniture, art and the individual preferences of each owner.

Ōtium comprises just eight homes; a garden residence, six upper-level residences and an expansive penthouse. The garden residence offers the most direct relationship with the landscaping, while the penthouse takes advantage of the development’s elevation with views across the parkland canopy towards the city.

A communal rooftop terrace provides another perspective over Bellevue Hill and Sydney. The space has been planned for quiet morning use as well as private gatherings, giving residents access to an elevated outdoor area beyond their individual terraces.

Construction is being undertaken by Ultra Building Co for developer Concretive. Ultra describes the development as a $16 million project and says its work has focused on natural stone, custom joinery, bespoke tiling, acoustic and thermal performance, and carefully resolved transitions between indoor and outdoor spaces.

The location places residents close to several distinct neighbourhood centres. Bellevue Road Village provides local cafés, shops and daily services, while Plumer Road, Double Bay and Bondi Junction extend the dining, retail and transport options. Cooper Park itself offers walking trails and tennis courts, with Sydney’s eastern beaches and the Royal Sydney Golf Club also within easy reach.

It is a location that allows daily life to remain highly connected while creating a more secluded atmosphere at home.

Ōtium is being marketed by Ray White Double Bay Projects, with agent Daniel Ungar noting the development’s strong appeal among buyers.

“Ōtium has resonated strongly with buyers because it offers a combination that is increasingly difficult to find in Bellevue Hill, generous, house-like proportions, privacy and a genuine connection to nature, without the maintenance of a freestanding home,” Ungar says

Above Cooper Park, Ōtium makes stillness itself part of the proposition, an increasingly valuable quality in one of Sydney’s most tightly held residential markets. It offers the security and lower-maintenance qualities of apartment living, but with larger interiors, private terraces and a natural outlook more commonly associated with a freestanding home.

Project details

  • Project: Ōtium
  • Address: 206B Victoria Road, Bellevue Hill, NSW
  • Developer: Concretive
  • Architect: MHN Design Union
  • Interior design: Ennen & Co
  • Builder: Ultra Building Co
  • Status: Under construction
  • Selling agents: Daniel Ungar & Zorick Toltsan | Ray White Double Bay Projects
  • Contact: 0400 112 202 | 0411 227 784
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