New Construction Projects in Monaco: Mareterra & Urban Development

Overview

Monaco's 2.02 square kilometres make it one of the most densely built environments on earth, and new development is a constant challenge. The Principality addresses this through ambitious engineering projects — land reclamation, vertical construction, and underground expansion — while maintaining strict architectural and environmental standards. The most significant project of the current era is Mareterra, a six-hectare land extension that has increased Monaco's surface area by approximately 3%.

Mareterra (Portier Cove)

Mareterra is the defining development project of modern Monaco. This €2 billion land reclamation project, located between the Grimaldi Forum and the Larvotto beach, created six hectares of new land on the Mediterranean seafloor. Inaugurated by Prince Albert II, the eco-district represents both an engineering feat and a statement about Monaco's sustainable ambitions.

Key Features

• 110 luxury apartments and 10 villas across several residential buildings, including Le Renzo (designed by Renzo Piano Building Workshop) and Les Jardins d'Eau
• A public park and promenade extending the Larvotto waterfront, open to all
• A new marina with berths for superyachts
• Commercial and cultural spaces integrated into the district
• Japanese garden and landscaped areas with over 800 trees planted

Sustainability

Mareterra was designed with environmental ambition. Solar panels covering 4,500 square metres supply around 40% of the district's energy. Seawater thermal loops provide heating and cooling. Rainwater is harvested for irrigation. Over 200 electric vehicle charging stations are installed. An artificial reef was created offshore to support marine biodiversity.

Timeline

The first residences began delivery in 2025, with the public park and commercial spaces opening in phases through 2027. The project was designed jointly by Renzo Piano Building Workshop and Valode & Pistre Architects.

Other Notable Developments

Princess Grace Hospital Centre (CHPG) Reconstruction

The reconstruction of Monaco's only public hospital is one of the largest ongoing infrastructure projects. The new state-of-the-art facility, located on the existing site in the upper part of the Principality, is being delivered in phases. The first phase opened to patients in early 2026, with full completion expected by 2032. The project significantly expands capacity and modernises every department.

Fontvieille Industrial Zone Renovation

Several buildings in the Fontvieille area have undergone or are undergoing renovation to modernise commercial and light-industrial spaces while maintaining the district's economic role. These projects aim to improve energy efficiency and working conditions.

Ongoing Building Renovations

Across Monaco, older residential buildings are regularly renovated to meet modern standards. The government encourages energy-efficient upgrades and has programmes supporting building envelope improvements, particularly in state-owned residential stock.

Development Constraints and Approach

New construction in Monaco faces unique constraints:

• No outward expansion — Monaco is bordered by France on three sides and the sea on the fourth. New land can only be created through reclamation.
• Height restrictions — buildings are generally limited in height to preserve views and the skyline, though exceptions exist for specific projects.
• Environmental requirements — all major projects must include environmental impact assessments and mitigation measures.
• Heritage preservation — historic buildings and districts are protected, limiting redevelopment options in certain areas.

The Principality's approach favours quality over quantity: fewer, highly engineered projects that maximise use of limited space while meeting environmental and aesthetic standards.

Impact on the Property Market

New developments like Mareterra add ultra-premium inventory at the very top of the market, with prices well above €100,000 per square metre for the finest units. While this creates new options for the wealthiest buyers, it does relatively little to increase supply in the mid-range segment. The structural scarcity of buildable land means Monaco's property market is likely to remain among the most expensive in the world for the foreseeable future.

Looking Ahead

Monaco's government continues to study options for future development, including further underground expansion (extending existing car parks, commercial zones, and infrastructure below ground) and potential further land reclamation. Any future projects of the scale of Mareterra would require years of planning, environmental study, and engineering design before breaking ground.