Atland and PGGM inaugurate "51 Hoche" in Paris

The result of close collaboration with the City of Paris, the Architecte des Bâtiments de France and the architect Samuel Nageotte of the BSTLL agency, this emblematic building of 19th century Haussmann architecture has been completely rehabilitated to house the bank. independent consultancy Centerview Partners brought the entire program to the tenant several months before its delivery.

The adaptation of historic architecture to today's uses

Built in 1876 by the banker Alfred Hainguerlot, the "51 Hoche" underwent major transformations at the discretion of its successive owners, including the raising of two levels above the second floor as well as the creation of a staircase on the ground floor. ground floor and first basement.

Acquired jointly by ATLAND and PGGM in 2020 as part of their joint OPPCI managed by ATLAND Voisin, the former private mansion is the subject of an ambitious restructuring program to bring it into line with modernity and respond to new ways of working more flexible. Although the historical elements have been restored, the new project, which promotes "Paris Haussmann", is now part of its time and looks to the future.

Although the vast majority of the structure of the building is preserved, the restructuring represents a profound change: the verticalities are optimized to free up the floors; the passage coachman is the subject of an extension which transforms it into a high hall surmounted by two levels of offices; a space of 300 m² created on the ground floor and overlooking an open-air courtyard opens up to many uses (meetings, events, lunches and breaks, afterworks, etc.); the alignment of the upper floors restores coherence to the building.

A sheet of glass with a minimalist design marks the access to the garden in the ground which contributes to the reinforcement of the ecological heritage of the place.

A low-carbon and resource-friendly approach

Combining historical and modern approach, the rehabilitation project of "51 Hoche" has been the subject of significant work on the environmental performance of the building which has earned it a triple label: HQE, Very efficient level; BREEAM, Very Good level and WIREDSCORE, Classic level.

Favoring the use of healthy and eco-responsible materials with emission class A+, the operation is ambitious, sustainable and exemplary. Thus, 80% of the original structure of the asset was reused: the structure of the new roof was made of timber; the massive stone facings of the extended level were carefully dismantled and then put back in place in their new location. In addition, a commitment to sorting and recovering waste was made as soon as deconstruction took place.

Compliant with the requirements set for 2030 by the tertiary eco-energy system imposing a 40% reduction in energy consumption for all tertiary buildings whose surface area exceeds 1.000m², the final energy consumption of "51 Hoche" is 80% lower than the average consumption of the French tertiary sector (100kWhef/m² against 179 kWhef/m²). Control of the energy performance of the building favored by the implementation of full thermal insulation from the inside, the installation of false radiant ceilings as well as double flow ventilation with energy recovery.

Regarding the management of outdoor spaces, the watering of the landscaped garden with species that promote biodiversity and the fight against the heat island effect is ensured by a system for recovering rainwater from the roof.

For Georges Rocchietta, President of ATLAND: “For this emblematic asset located in the heart of the central business district, we have implemented all of ATLAND's know-how to enhance its historical heritage and ensure its sustainability. Thanks to our recognized expertise in the rehabilitation of office buildings, we have met new expectations in terms of quality of life, performance and environmental responsibility. The labels obtained by 51 Hoche are also among the most demanding. We are very satisfied with the success of this restructuring, which is materialized by its leasing to a leading economic player several months before its delivery. This elegant private mansion with its facade typical of Haussmann architecture is now part of our heritage of Parisian assets on rue d'Artois, rue Beaujon, rue de Bruxelles and Cité Paradis. »

For Jonathan Azoulay, Deputy Managing Director – Asset Management of ATLAND Voisin: “In the very dynamic tertiary environment of one of the most beautiful avenues in the Étoile district, the restructuring of 51 Hoche had to be exemplary. The level of requirement of the services desired by ATLAND has reached excellence here. We have given it back its nobility by being very respectful of its architectural past and by directing this renaissance with the desire to increase its surfaces. Everything here has been reinvented to offer its new tenant comfort and an image worthy of the prestige of Avenue Hoche: the porch has retained its original appearance; its function as a place of communication has been amplified by closing the passage to the interior with an innovative glazed facade and by adding three additional levels; the facade overlooking the new garden has been realigned to gain surface area; an informal place of 300m² has been created on the ground floor to be able to receive the public and the circulations have been completely redesigned to facilitate exchanges and promote dialogue. Small object but large building, the 51 Hoche has been the subject of all attention. »

For Samuel Nageotte, architect and engineer: "To enhance this 19th century office building - both in terms of heritage and uses - we wanted to find a general consistency of volumes and the integrity of the original interior organization while giving the whole the performance and the highest comfort. Each of our interventions has therefore been as discreet as possible to highlight the qualities of this typical Parisian private mansion. This is how the extension strategies are developed mainly underground and in the existing asperities in the superstructure. The enhancement of 51 Hoche is amplified by the creation of a garden and the enhancement of the open ground. This work on landscape integration also benefits the city thanks to the permeabilization of the soil and the reception of biodiversity. For its new life, 51 Hoche offers its users more convivial shared spaces, more efficient workspaces and more generous outdoor spaces. »

• Architect's office: BSTLL, bringing together the agency Samuel Nageotte Architectures and the Atelier Nicolas Salmeron
• Execution project manager: the CALQ architecture agency
• Mandated agents: Knight Frank, Alex Bolton and BNP