BERGÈRE X PARIS

Paris 9

PCA-STREAM lends new impetus to a banking complex from the late nineteenth century, remarkable by its heritage value but closed on itself and poorly adapted to today’s modern requirements. Through a subdued intervention following a circular approach, the studio has augmented the building with new outdoor spaces, as well as programs and services that are largely porous to the vibrant city life within the district.

BERGERE SITE
IMP_BNP_Bergere_PV01_Rue_Bergere_V1M2
IMP_BNP_Bergere_PV02_Rue_Ste_Cecile_V2

Images

Process

BERGÈRE X PARIS enjoys a central location with excellent transport connections, allowing it to benefit from the amenities of the lively heart of Paris. Located in the south of the 9th arrondissement, the building is part of a district transformed by the Haussmann breakthroughs of the 19th century, embodying its architectural elegance. With its very Parisian feel, its many emblematic passages and restaurants, and its pleasant walkability, this district is a favorite with Parisians and foreign visitors alike. Historically linked to finance and the press, it has reinvented itself at the crossroads of rich identities, between business, the « Silicon sentier » start-up world and the trendy Paris of « fooding ».

A palimpsest ensemble

The classic, monumental elegance of BERGÈRE X PARIS reflects the prestigious nature of its original design. The project was born in the early 1880s, from the Comptoir National d’Escompte de Paris’s desire to locate its headquarters in the heart of the business district. Architect Edouard-Jules Corroyer placed the emblematic façade to the west of the plot, in line with Rue Rougemont, and visible from the Grands Boulevards. Between 1886 and 1899, the CNEP acquired the adjacent buildings and launched the 2nd development of the site, under the direction of François Constant-Bernard. In 1929, additional floors were built at 18 rue Bergère, before the bank acquired 20 rue Bergère in 1955, a building designed by Paul Friesé and dating from 1905. The latest extension and complete interior renovation was carried out in 2009 by Anthony Bechu on behalf of BNP Paribas.

A necessary reinvention

The care invested to ensure the coherence of the overall site when extensions were made, and the preservation of the building’s heritage, paradoxically made it a secluded sanctuary. Enclosed in the solitude of its uses, it remained withdrawn from the vibrant life of the 9th and 10th arrondissements of Paris. Despite its untapped potential in terms of density and uses – including a cold atrium, courtyards, garden and exceptional, under-utilized roofs – the building complex offered an unusual situation for rehabilitation in Paris: given the quality of the building and its recent renovation, the question of its obsolescence called into question the very principle of a new intervention. But the Decree on the tertiary sector and the obligation to reduce energy consumption by 2030, 2040 and 2050, which the building did not meet, called for a thorough reinvention.

A renaissance geared towards 2050

After more than a century of existence and transformations, the building is now undergoing a renaissance. PCA-STREAM is taking a humble approach, giving the building a fifth life in keeping with its history, and aiming from the very start to meet the energy objectives of 2050. The project provides sustainable solutions to facilitate the building’s long-term resilience. The ambition is to revitalize the serene, classical beauty of BERGÈRE X PARIS, to create a dialogue with the city by brightening and densifying it, as well as enriching it with a variety of programs to reintegrate it into Parisian life. As a result, BERGÈRE X PARIS will be able to withstand the coming decades without major interventions. A new central axis for the distribution of flows reclaims the base for spaces designed for multiple audiences. Spread out over the five floors, it provides a high degree of flexibility for tertiary spaces. The redevelopment of the patio and atrium, and the opening of a staircase, unlock the building’s capacity to accommodate services and amenities. The garden, redesigned on two levels, enhances the quality of the user experience by providing a high-quality exterior for the brasserie and business center. On the facade, direct access from the street to the club and to the bistro-café creates a ripple effect enabling urban life to develop in and around the building. The installation of a roof terrace and the creation of two new spaces on the ground floor (R+6), the Parisariums, offer exceptional views over the landscapes and rooftops of Paris.

An understated, sustainable heritage approach

PCA-STREAM has chosen to intervene with humility, giving the complex a fifth life by drawing on its history and setting its sights from the outset on the energy targets for 2050. The project shows that heritage redevelopment and environmental ambition can coexist in harmony. The approach favours making the most of what already exists, through selective deconstruction and a reuse strategy, cutting carbon emissions by 20% for construction and 50% for operation. More than 85% of the stripped-out materials are recycled or reused, with greater use of low-carbon, bio-based materials. The outdoor spaces, increased by 15%, include gardens, rooftops and planted areas that create cool islands. The project encourages soft mobility, with 270 spaces for bicycles and 75 for electric vehicles. Targeting BREEAM and HQE (Excellent) certification, along with the BBCA and BiodiverCity® labels, it meets Net Zero Carbon objectives and the requirements of France’s 2050 Tertiary Decree.

Inspired by high-end hospitality, this smart building offers shared services, hospitality-led management and adaptable spaces that respond to changing needs. Designed to last, it combines environmental sustainability with appeal for its users, in a setting that fosters biodiversity and comfort.

Reusing the window frames and replacing the glazing

To improve the building’s thermal performance without generating needless waste, PCA-STREAM devised a system to enhance the efficiency of the 600 existing windows of BERGÈRE X PARIS, based on retaining some of the window frames, reusing the existing ones, an innovative process for assembling the glass with a vacuum layer, and a low-carbon manufacturing process for the glass panes.

During the most recent works campaign, carried out by Anthony Béchu in 2009, all the frames had been replaced like-for-like using a stratigraphic process that recreated the original colours. To make the most of that work and to respect the building’s various periods of architectural history, Bouygues Bâtiment Île-de-France Rénovation Privée applied three principles: retaining 11% of the window frames, reusing 58% (to optimise embodied carbon), and replacing the glazing in the reused frames (to reduce heat loss and optimise operational carbon). The frames and glazing of the north façade, on rue Sainte-Cécile, are kept as they are.

External insulation, often the most effective, was not possible on this listed façade, so internal insulation was the necessary choice. Triple glazing proved incompatible with the existing frames, whose rebates were too narrow.

An innovative assembly process was therefore developed for the reused timber frames — half of all the window frames in the project. The chosen glazing consists of two 4 mm sheets of glass separated by a 1 mm vacuum, one of them coated with a super-insulating layer. Tiny, almost invisible ceramic beads, spread across the empty space, prevent the two sheets from touching under external pressure. The inorganic perimeter seal, free of lead or any other heavy metal, ensures high mechanical strength and a perfect airtight seal. A low-emissivity or solar-control coating is applied to one of the sheets, on the vacuum-cavity side. This glass meets the durability tests of the ISO 19916-1:2018 standard, which have certified a service life of at least sixty years.

Work in progress

Technical specifications

News & Awards