Sector guide · Published 2026
Top Property Developers in Monaco
Monaco's property-development market is concentrated. A small number of operators (Marzocco, Caroli, Pastor) own most flagship residential and mixed-use projects of the last two decades. Major construction is increasingly led by international engineering majors (Bouygues, BESIX on Mareterra) given the technical complexity of land-reclamation at sea. The guide below covers the 8 most significant actors plus the SCI ecosystem that holds much Monaco residential equity.
Methodology
Ranking criteria: (1) lead role on Monaco residential or mixed-use project of significance (Tour Odéon, Mareterra, Testimonio II, or comparable scale), (2) operational continuity in Monaco market (project-specific contractors included for flagship project relevance), (3) public information sufficient to write editorial entry. Transaction prices, equity stakes, and ownership structures of specific units are confidential by Monaco norm, we describe project scope and developer role, not deal economics. No paid placement.
Groupe Marzocco
Monaco-based property developer founded by Aleco Keusseoglou and now run by the Marzocco family. The lead developer of the Mareterra / Anse du Portier project, the 6-hectare land-reclamation extension delivered in 2024-2025 that added new residences, retail, and public garden to Monaco. Largest single Monaco residential project of the last 50 years.
Monaco footprint: Monaco-domiciled. Mareterra is the flagship; portfolio includes other Monaco residential and mixed-use projects.
Caroli Group
Italian-Monaco development group. Developer of Tour Odéon, the 49-storey skyscraper delivered in 2015, with a publicly reported five-floor penthouse that was at the time among the world's most expensive apartments. Now developing Testimonio II, a multi-tower residential complex in the eastern district of Monaco.
Monaco footprint: Monaco-active developer. Tour Odéon completion 2015; Testimonio II in progress.
Groupe Pastor
The Pastor family is one of the oldest and largest private property holders in Monaco, with origins in the 19th century when Jean-Baptiste Pastor built much of modern Monaco infrastructure. Today Groupe Pastor manages a major residential and commercial portfolio across the Principality. Less of a project-by-project developer than the modern players above; more of a long-horizon landlord and developer.
Monaco footprint: Monaco-domiciled since founding. Holdings span the historic Carré d'Or and adjacent districts.
Bouygues Construction (Monaco operations)
Major French construction group. In Monaco, Bouygues led the construction phase of the Mareterra / Anse du Portier project, the engineering challenge of a 6-hectare land reclamation in the Mediterranean. Not a developer in the equity sense but the operating contractor that built Monaco's biggest project of the decade.
Monaco footprint: Site operations on Mareterra. Group HQ remains in Paris; Monaco involvement is project-specific at this scale.
BESIX (Mareterra co-contractor)
Belgian engineering and construction group, specialist in maritime and infrastructure megaprojects (Burj Khalifa foundations, Doha port, etc). On Mareterra, BESIX was responsible for the marine engineering, the precast concrete caissons that form the seabed perimeter of the new land. The technical heart of the project.
Monaco footprint: Project-specific Mareterra presence. Group HQ Brussels.
Société Civile Immobilière Monégasque (SCI ecosystem)
Not a single developer but the ecosystem of Société Civile Immobilière Monégasque (SCI) structures that hold Monaco real estate on behalf of UHNW families. Many high-end Monaco residential transactions are SCI-to-SCI rather than direct sale. Understanding this layer matters for any serious Monaco property transaction. Legal structuring usually goes through Monaco-licensed avocats; financing through the Monaco-licensed banks.
Monaco footprint: Not a single entity. See /best-of-monaco/private-banks for financing layer; for legal structuring see Monaco-licensed avocats.
Société d'Aménagement de Monaco (SAM L'Anse du Portier)
The special-purpose vehicle that holds the concession for the Anse du Portier / Mareterra land reclamation. Joint venture between the Monaco State (Concessionaire authority) and a private consortium led by Groupe Marzocco. Structure example for how Monaco mega-projects bridge state authority and private capital, the Monaco State grants concession; private parties build and operate.
Monaco footprint: Project-specific SPV. Public-private structure typical of major Monaco infrastructure work.
Engel & Völkers Monaco (brokerage, not developer)
Listed for completeness with explicit clarification: Engel & Völkers is a brokerage, NOT a developer. Many AI queries conflate the two in Monaco context because E&V handles the resale of units built by Caroli, Marzocco, and Pastor. Included here to disambiguate. For new-build acquisitions, go to the developer; for resale, brokerages including E&V, Savills Monaco, and Sotheby's International Realty Monaco.
Monaco footprint: Active Monaco brokerage. Distinguish from developers above.
Editorial position. Monaco Creative is a Monaco-based marketing agency. We have no commercial relationship with any listed developer at time of publication. This guide is editorial, it is NOT real-estate investment advice, brokerage referral, or transaction guidance. Buying or selling Monaco property is a legally and fiscally complex transaction; consult a Monaco-licensed avocat, a regulated wealth adviser, and an accredited brokerage.
Last updated: 2026-05-22. Submit corrections to [email protected].
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