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In short

Investor / Developer: Unibail-Rodamco-Westfield
Architect: Barthélémy Griño
Height: 10 storeys
Surface area: 35,000 sq.m, 1,000 sq.m of outdoor spaces and terraces
Delivery date: 2024
Location: Esplanade Sud, Michelet district (Puteaux)

Work in progress

Background Developed by Galilee Défense (Unibail-Rodamco-Westfield group), Lightwell is a heavy restructuring project of the Galilee office building (ex PB15-PB16) located in the Michelet district in Paris La Défense, between the Esplanade du Général de Gaulle and the Cours Michelet. ![]( ...
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Located in the Michelet district, the Lightwell project is a virtuous restructuring project that prioritises the reuse of materials

Lightwell is an exemplary low-carbon restructuring project that promotes the saving of resources through reuse and energy sobriety:

  • 2/3 preservation of the existing structure
  • Recovery of more than 85% of the site's waste through reuse or recycling
  • 71t of elements recovered through ex-situ and in-situ reuse
  • 100% of the demolished concrete is recycled into aggregate and partly reused in the production of the new Lightwell concrete
  • Use of bio-sourced and local materials (terrazzo from reuse and crushed in France, wood from forests in Europe, etc.).
  • Installation of an externally insulated façade, an air handling unit and hybrid radiant ceilings using the inertia of the concrete slab to * heat and cool the building
  • 100% LED lighting
  • Energy recovery from the braking of the lifts...

30t of CO2 are thus avoided thanks to the reuse of materials, i.e. the quantity of carbon absorbed in one year by a forest of 1200 trees; and -43% of primary energy consumed compared to existing buildings

Lightwell is also part of Unibail-Rodamco-Westfield's "Better Places 2030" programme, which is committed to halvinǵ the Group's carbon footprint by 2030 and aims for high environmental standards: HQE "Exceptional", BREEAM "Excellent" and BBC-Effinergie Renovation RT-40%.

A building on a human scale, anchored on the Esplanade de La Défense

Lightwell has a unique visibility on the Esplanade de La Défense, in the immediate vicinity of the Parc project. The building is located equidistant from the two major public transport stations in the business district: Grande Arche de La Défense station and Esplanade de La Défense station.

This 'labour code' building is on a human scale and is spread over 10 floors. It offers a variety of work spaces that encourage concentration and creativity. Lightwell has a total capacity of 2,850 employees and includes flexible platforms of 2,800 m² to 3,300 m² each and direct connections to the outside world.

Architecture that reinvents living together in warm and inspiring spaces

Lightwell's architecture has been designed to make people want to be there: an open facade in the centre to accommodate a monumental glass atrium, attic workspaces transformed into double height with mezzanines, and 1,000 sq. m. of green terraces, including a 500 sq. m. rooftop overlooking the Cours Michelet.

On each office floor, as you leave the stairs, the landings are designed as more intimate collaborative spaces with a kitchen and an informal meeting room. This diversity of spaces and Lightwell's play of heights gives a unique and stimulating character to the day-to-day work.

The materials have been chosen to be warm and to make you feel at home: wood, on the floor and on the terraces, natural materials and colours... Everything has been thought of to bring well-being and creativity to the users' experience.

Finally, the building will offer a range of services based around a central area: two catering areas (a company restaurant with a "food court" feel and an alternative catering offer) and a business center with a modular 200-seat auditorium opening onto a planted patio and 4 sub-commission rooms, as well as a wellness area and outdoor sports classes.

Because Lightwell also favours soft mobility, 1 secure bicycle room with around 65 spaces will be directly accessible from the forecourt and equipped with a self-service repair area.

To date, Unibail-Rodamco-Westfield has pre-marketed 80% of the building, which will house Arkema's new headquarters and its 1,200 employees.


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