Green Hall 2 office building is located in Lithuanian capital Vilnius, in Žvėrynas district, near river Neris. The building is a second stage of an office building complex developed by SBA which is called The Green Hall Valley. The building is of 8800 m2 area, and 7 story heigh.
The Green Hall Valley development started with the first stage building in 2009. The idea was to create a comfortable, contemporary, and somewhat futuristic working environment in the surroundings of natural landscape of river Neris and a greenery rich Žvėrynas district. This idea continued to the next stage.
The building mass is mainly shaped by the surroundings: the street, the river and the size and shape of a land plot, with the existing building and underground parking occupying most of the territory. The building is positioned so it could be built without interrupting the work of an existing underground parking and an office building. It creates a cozy inner yard and separates it from the street noise and winds. Due to its curvature the Green Hall 2 building is never perceived as a whole volume, because it covers itself looking from most angles.
An inspiration for architectural expression of a building comes from contemporary parametric design (e.g. cars). Both the shape and metallic, reflective materials are chosen, to create a distinct modern/natural relationship between the building and nature. Doubled roof and rear facades are covered in brushed aluminum panels that are visible from upper slopes of Žvėrynas district. The double-skin side façades with diagonal profiles simulate double curvature and stresses the dynamics of a building. A most complex part of a Green Hall 2 building - a curved and leaning, mirrored glass façade, oriented towards the town center. It reflects the river and a water basin beneath it.
Landscape around the building consists of natural materials, suitable for Lithuanian climate. Natural granite pavement and fountain stairs, aged oak benches and plants, carefully selected to accommodate seasoning. Composition of landscape consists of hills, paths and granite stairs that connect with the landscape architecture at the river valley. The architectural idea of the main lobby interior is to create a clear transition between natural surroundings outside and the building. White is used as a dominant color to create almost sterile, shiny and light environment. Dominant compositional elements of the lobby interior are curved staircase in the center and balconies around them. A distinctive geometric 3D wall, extends to the ceiling, creates playful shadows on it and serves as an acoustic element.
Green Hall 2, became the first office building, to acquire an A+ energy efficiency certificate in Lithuania. Almost all the energy needed for heating and cooling is acquired from a renewable geothermal energy source. Curved and relatively narrow shape allows for natural sunlight to reach all working areas inside the offices. A fully automated blinds and deep profiles of a second skin protects from overheating. Every resident of a building has an autonomous HVAC system.