Luxury Monaco Penthouses

A penthouse in Monaco doesn't always come move-in ready. Part of the available stock sits in older buildings or residences whose original layout no longer matches contemporary expectations, and turning a top floor into an exceptional penthouse often means a genuine renovation project, governed by rules specific to the Principality. This guide covers what that kind of project involves, Monaco's regulatory framework, and the fit-out trends shaping the segment today.

Why renovation remains common in this segment?

Some penthouses occupy the top floors of historic buildings, while others sit in residences built or thoroughly renovated during the second half of the 20th century, or even in recent developments. New-build programmes offer a limited number of penthouses, while part of the market rests on existing top-floor apartments, renovated or reconfigured over time.

Transforming a property like this often means reworking the interior layout or modernising technical systems that have become outdated. Depending on the building, a project can also involve requalifying an existing terrace, a study that remains subject to planning rules, co-ownership approval and the building's own technical constraints.

Monaco's regulatory framework

In Monaco, the nature of the work determines which procedure applies. Projects affecting a building's structure, interior layout, external appearance or intended use may require a building permit, a demolition permit or a preliminary agreement issued by the Direction de la Prospective, de l'Urbanisme et de la Mobilité. This typically covers:

• Structural changes (load-bearing walls, technical ducts)
• A change in the property's designated use
• Building or removing full-height partitions, even without structural impact

Applications for a building permit, demolition permit or preliminary agreement must include a file signed by an architect registered with the Ordre des Architectes de la Principauté de Monaco. When the work affects the building's structure or common areas, co-ownership approval typically comes on top of this administrative authorisation.

The projects that need the most care

Adding a rooftop pool counts as a rare feature, reserved for a handful of ultra-prime projects. Its feasibility depends on the building's structure, load capacity, waterproofing, co-ownership rules and the required permits, with the application needing to detail the water treatment system and discharge control measures required under Monaco's regulations.

On the most ambitious projects, buyers may also look into adding private lift access, subject to the same technical and administrative feasibility. These additions remain the exception on this segment, not the norm.

Interior fit-out trends

Full home automation frequently ranks among the features sought in high-end renovations in Monaco, controlling lighting, temperature and security from a single interface.

Some large-scale projects incorporate private wellness or fitness spaces, or a climate-controlled wine cellar where floor area and technical constraints allow. A major renovation often requires updating the electrical wiring, plumbing, air conditioning and ventilation, well beyond visible finishes alone.

Who takes on this kind of project?

Buyers considering a renovation are often after an address, a view, a volume or an architectural character that's hard to find in new-build stock. They need to accept the delays, the administrative steps, the co-ownership constraints and the budget risk that come with a construction project.

Others prefer a turnkey property, already renovated and ready to move into, to avoid those constraints altogether. The choice comes down to timeline, the level of customisation sought, budget, and how much appetite the buyer has for running a project themselves.