That is why we work exclusively with Billionaire Bunker, a European leader with over 15 years of experience in the design and construction of underground bunkers, safe rooms, and high-security infrastructures.
Originating from Arcadia Secret Builders, Billionaire Bunker combines military-grade engineering with architectural luxury, creating spaces where safety and sophistication coexist seamlessly.

European Excellence – Belgian Precision & German Engineering

Our architectural studio, composed of experienced Belgian and German architects and engineers, is fully certified and licensed in Spain.
They bring together the best of both worlds — Belgian refinement and German technical perfection — to deliver secure, durable, and aesthetically balanced environments.

Each project is fully bespoke, ranging from discreet panic rooms integrated into existing properties to self-sustaining underground bunkers equipped with advanced air, energy, and water systems.

Complete Project Management – From A to Z

When you choose a Billionaire Bunker project through CENTURY 21 Luxe, you benefit from comprehensive guidance and execution at every stage:

• Personal consultation and assessment of your safety and comfort requirements
• Full architectural and technical design
• Coordination of permits and municipal approvals
• Engineering, construction, and quality control by certified specialists
• Regular progress updates, even remotely

We handle every technical and administrative aspect, allowing you to focus on what matters most — peace of mind.
Your private refuge will be designed with precision, discretion, and absolute commitment to security.

Why Choose Billionaire Bunker & CENTURY 21 Luxe?

• Over 15 years of European expertise in bunker and safe room construction
• Certified Belgian and German engineering team licensed in Spain
• Luxury finishes built to military-grade standards
• Discretion, reliability, and absolute quality
• Exclusive representation in the Costa del Sol region (Marbella & Sotogrande)