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A new residential neighbourhood in Boitsfort on an iconic site


Discover the majestic world of Royale Belge, a sophisticated haven of calm and revitalisation. A heritage that comes back to life, where time seems to stand still just for you. The 165 apartments and penthouses of Souverain 23 are ideally located on the fringe of the Sonian Forest, in an area of approximately 4400 ha of nature. Breathe in the fresh air and enjoy.  The plans, illustrations and descriptions on this website are for guidance.

An exclusive environment

Step inside the iconic buildings on the fringe of the Sonian Forest, near Brussels, and make yourself at home in a prestigious location of peerless comfort.

Unrivalled quality of life

Superlative apartments, sylvan setting and ideal accessibility: this location makes the perfect springboard for getting out and about. You’ll just love every minute. Discover these ultra-modern residences with a retro touch. Carefully chosen materials and shades as bronze and wood, are combined in perfect harmony.

Sonian Forest

Assimilate the calm of natural surroundings with 4,400 hectares to explore on foot, by bicycle or on horseback. All this on your doorstep!

The apartments

Whether you aspire to move in to a luxury property or to invest profitably, Souverain 23 has the right apartment for you.

Souverain 23 was designed in accordance with the strict energy standards in Brussels. The digital concierge, energy-efficient floor heating and balanced ventilation provide a pleasant climate control in your entire flat.


Starting at 125 m2, all the penthouses offer wide terraces and spacious living with every amenity. A dedicated interior designer is at your service.

The penthouses at Souverain 23 feature wide terraces, each with an aromatic herb garden as a decorative border. There are splendid views of the green parkland around the estate.

Large glazed expanses are a striking feature of the penthouses. Through them, the interiors are bathed in soft, lovely daylight. Your windows stand as high as they are wide, conferring exceptional luminosity.

Each penthouse is equipped with stylish, floor-to-ceiling doors and a security door at the entrance level. That way, you can leave your worries behind and enjoy your own place, supported by smart living technology that simplifies daily life, if requested.


An elegant interior design deserves top notch materials. A luxurious Bulthaup kitchen with handleless cabinets, Miele appliances and natural stone worktops contribute to great comfort. A walk-in shower and wooden parquet floors complete the exclusive atmosphere.

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"Ideally positioned, Royale Belge enjoys excellent public transport to the European Quarter. Bus and tram stops close to the site connect you with everything!"

  • Royale Belge is only five minutes away from the E411 motorway and Brussels ring.
  • The cycle track allows you to explore the surrounding area.
  • The Fauconnerie bus stop on your doorstep and the nearby Herrmann-Debroux metro station connect with many bus and tram routes to whisk you to your destination.
  • Taxis and Uber from Boitsfort train station are another convenient option.
  • Metro station
  • E411
  • Bois de la Cambre
  • Avenue Louise
  • Woluwe Shopping Center
  • European Quarter

Souverain 25:
Prestigious services right next door

Royale Belge promises to be the place where you live a life you could never have imagined. Work, eat, relax and have fun … Every amenity is on site!

Souverain 25 gives you access to a spa, a hotel, a swimming pool, restaurants, offices and other coworking spaces. Take part in exciting cultural events, relish the cuisine of top chefs or exercise with a view of nature. Feel at home…because that is where you are!

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