Triangle tops out, achieving a key milestone in the project's development

Developed by Unibail-Rodamco-Westfield (URW), creator and operator of sustainable destinations, and BNP Paribas Asset Management Alts, the largest alternatives asset manager in Europe, Triangle has now reached a major milestone with its topping out, marking the completion of the structural works and the building reaching its highest point at 180 meters.

This milestone reflects the collective effort of the construction workers, led by the general contractor Besix as well as the architects and design teams involved in the project, who have been working together to bring Triangle to life. 

Designed by world‑renowned architects Herzog & de Meuron, Triangle is a mixed‑use landmark featuring best-in-class energy-efficient office spaces that has no equivalent in Paris, also featuring an array of publicly accessible amenities including co-working and business centre space; a Radisson Blu hotel with a sky bar and restaurant; a unique artistic and cultural immersive experience known as “Summit” which is located on the top floors and operated by SL Green, which has chosen Triangle for its first international venture; a cultural centre; a nursery; a medical centre; and several convenience stores. The project will create a vibrant, animated urban space at Porte de Versailles in Paris 15th district, connecting the historic centre of Paris with Greater Paris. 

Step by step, Triangle is emerging as a key Parisian landmark, contributing to the city’s economic development while enhancing its long‑term attractiveness. 

Christoph Roettinger, Architect and Partner in Charge of Triangle at Herzog & de Meuron, said: “With Triangle now reaching its full height, its silhouette becomes part of the skyline of Paris - a new presence among the city's axes and monuments, with an exceptional triangular shape whose appearance shifts according to the observer's perspective.

This milestone marks an important moment in the life of the project and, with around one year to go before completion, the building is beginning to reveal its final character. We would like to thank the construction teams whose expertise and commitment are making the realization of this project possible.

Walking through Triangle today, one can already sense the vibrancy it will have. Its generous lobby opening onto the street, while its base with shops stretching from Porte de Versailles along Avenue Ernest Renan, anchors the building in the neighborhood.

In addition to the hotel and workspaces with terraces overlooking the rooftops of Paris, a panoramic belvedere at the top, accessible to the public, will offer a new perspective on the capital.

Triangle will also serve as a new link between the historic center and Greater Paris — a destination designed and open to all — for Paris, Parisians, and visitors from around the world.”

Mourad Akl, Managing Director of Development & Construction - Offices and Mixed-Use Projects, at URW, added: “With the completion of the structural works, and the building’s definitive external form now almost achieved, Triangle is entering a new and equally exciting chapter, the interior fit-out works progressively bringing our vision to life. Through a strong focus on interior design, 3,700 sqm of outdoor terraces, striking city views, abundant natural light, and a unique ecosystem of services, Triangle will offer an unparalleled day‑to‑day working experience in Paris. This project brings together the very best of technical and architectural innovation and illustrates URW Group’s commitment to contributing to the city of tomorrow.” 

Triangle sets a new standard for energy efficiency and actively contributes to Paris’s environmental transition. Strategically located at a major public transport hub, with direct access to metro lines, tramways and cycling infrastructure, the project promotes low‑carbon mobility. It has also been built to achieve an exceptionally high level of energy efficiency, with energy consumption 3.3 times lower than the average existing tertiary building stock and 40% below energy regulatory thresholds in 2050. 

The next stages will focus on the fit-out and development of the interior spaces. Delivery is scheduled for the first half of 2027.

More information about Triangle here 

Pictures of the project available here 

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Notes to editors

All figures as at end-December 2025. Based on BNPP AM internal data analysis.

About BNP Paribas Asset Management Alts

BNP Paribas Asset Management Alts (BNPP AM Alts) is the alternative investments platform of BNP Paribas Asset Management. It is the largest alternatives asset manager in Europe and a global leader, with approximately €300 billion in assets under management across Real Estate, Infrastructure, Alternative Credit and Private Equity. 

With more than 30-year track record, BNPP AM Alts has built a reputation as a pioneering and innovative asset manager, combining an entrepreneurial investment culture with strategic discipline.

BNPP AM Alts finances the real economy by providing equity and debt to help companies to expand by developing, managing and financing infrastructure and buildings essential to economic growth. 

Sustainability is at the core of our investment decision-making processes, with a particular focus on decarbonization.

All figures as at end-December 2025.
Based on BNPP AM internal data analysis

About BNP Paribas Asset Management 

BNP Paribas Asset Management (BNPP AM) is the asset manager of BNP Paribas, a leading banking group in Europe with international reach.

Among the top three asset managers in Europe, BNPP AM manages more than €1.6 trillion in assets for institutional, corporate, retail and wealth clients worldwide, combining liquid and alternative capabilities with a leadership position in long-term savings management for insurers and pension funds (€850 billion AUM). 

BNPP AM offers a broad range of liquid investment solutions, spanning fixed income, high conviction active strategies and a fast-growing ETF offering, together representing over €1 trillion in assets under management. 

The alternatives platform, built on over 30 years of experience, is the largest in Europe and a global leader, managing approximately €300 billion across real estate, infrastructure, alternative credit and private equity. 

Sustainable and thematic investment capabilities are embedded across the business, supporting client’s long-term objectives. 

BNPP AM brings together expert professionals across nearly 40 countries, blending global reach with local expertise. 

Source for combined AUM: BNPP AM, as of 31 December 2025. 
Based on Assets under Management ranking as published by major Asset Managers in 2024 - IPE Report 2025.
Based on BNPP AM internal data analysis. 

About Unibail-Rodamco-Westfield 

Unibail-Rodamco-Westfield (URW) operates vibrant retail-anchored destinations in many of the world’s best cities and urban areas. This powerful network attracts over 900 million customer visits annually, supports the growth of major retailers, and makes a significant social and economic contribution to local communities. 

This network includes 66 owned shopping centres in the US and Europe that represent around 88% of the Group’s €49 Bn asset portfolio – with 41 centres operating under the iconic Westfield brand. URW also has partners who operate Westfield-branded destinations in fast-growing new markets. 

Through its ‘A Platform for Growth’ business plan, URW is generating organic growth, leveraging the power of the Westfield brand, and unlocking capital light growth opportunities to generate compelling shareholder returns. This is supported by the Group’s ‘Better Places’ sustainability roadmap, which has established URW as a leader in the real estate industry and one of the 100 most sustainable companies in the world. 

URW’s stapled shares are listed on Euronext Paris (Ticker: URW). The Group is rated BBB+ by Standard & Poor’s and Baa2 by Moody’s.   

For more information, please visit www.urw.com. 

About Herzog & de Meuron

Herzog & de Meuron is an international architectural practice based in Basel, Switzerland. Established in 1978, the practice is led by the two founders, Jacques Herzog and Pierre de Meuron, together with the Partners and the CEO. Today, an international team of over 500 collaborators is engaged in a wide range of projects across Europe, the Americas and Asia. The main office in Basel works in tandem with studios in Berlin and Munich, London, Barcelona, Hong Kong, New York, San Francisco and Paris.