Mareterra: Project Overview
Monaco's Most Ambitious Project
Mareterra — formerly known as Anse du Portier — is the most ambitious construction project in Monaco's modern history. This €2 billion land extension project has created 6 hectares of new land on the Mediterranean, expanding Monaco's territory by approximately 3%. The project, which began construction in 2017 and is delivering its first phases in 2025-2026, represents the first significant territorial expansion since the Fontvieille district was built in the 1980s.
Residences and Pricing
The development includes approximately 60,000 m² of luxury residential space, featuring around 120 ultra-premium apartments, a handful of villas, and several penthouses. Prices for Mareterra residences start at approximately €100,000 per square meter, with the most exceptional units commanding significantly higher premiums. The project targets ultra-high-net-worth buyers seeking the newest and most prestigious addresses in Monaco, with many units purchased off-plan by international collectors of trophy real estate.
Property Prices: Mareterra vs Other Neighborhoods
| Neighborhood | Avg. Price per m² (2026) | Typical Range | Character |
|---|---|---|---|
| Mareterra | €100,000+ | €100,000-€150,000+ | Ultra-premium new build, seafront |
| Carré d'Or (Monte-Carlo) | €70,000-120,000 | €60,000-€150,000 | Historic prestige, central location |
| Larvotto | €50,000-70,000 | €45,000-€80,000 | Beach access, modern developments |
| Port Hercule | €45,000-65,000 | €40,000-€75,000 | Marina views, yacht community |
| La Condamine | €35,000-50,000 | €30,000-€55,000 | Central, market area, practical |
| Fontvieille | €35,000-48,000 | €30,000-€52,000 | Family-friendly, commercial area |
| Moneghetti | €30,000-45,000 | €28,000-€50,000 | More accessible entry point |
Sustainability and Innovation
Sustainability is a central feature of Mareterra's design. The project incorporates extensive marine protected zones, artificial reef structures to preserve biodiversity, a seawater heating and cooling system (thalassothermie), solar panels, and extensive green spaces including a Japanese-inspired public garden. Prince Albert II has positioned Mareterra as a demonstration that luxury development and environmental responsibility can coexist, consistent with his long-standing commitment to ocean conservation.
Market Impact
The impact on Monaco's real estate market has been significant. Mareterra has added to the ultra-premium inventory, allowing some upward pressure in adjacent neighborhoods to ease. However, the overall effect has been to reinforce Monaco's position as the world's most expensive property market by providing modern, new-build inventory that the market was lacking. For investors, Mareterra represents both a prestige acquisition and a long-term value proposition in a jurisdiction where land will always be the scarcest resource.
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Key Takeaways
- Mareterra is a €2 billion land reclamation project adding 6 hectares — Monaco's largest expansion since Fontvieille (1980s).
- Prices start at €100,000/m², targeting ultra-high-net-worth buyers seeking Monaco's newest prestige address.
- The project features ~120 residences, including apartments, villas, and penthouses, with first deliveries in 2025-2026.
- Sustainability is central: marine protected zones, artificial reefs, thalassothermie cooling, and solar energy.
- Mareterra has reinforced Monaco's position as the world's most expensive property market while adding rare new-build inventory.