As an extension to the commercial site of the listed Osram-Höfe, two seven-storey office buildings of the same size were built alongside the street on the previously undeveloped site at Seestraße 66-67 in Berlin. The previous gap between the existing buildings at Seestrasse 65 and Seestrasse 68 was closed with two front buildings.
Both buildings were erected in reinforced concrete skeleton construction with load-bearing façades and an inner column grid. The outer basement walls, perimeter walls and courtyard basement ceiling of the underground car park were constructed in waterproof concrete.
The normal storeys of the building sections were given different beige and colourful façades made of clinker brickwork with differentiated divisions. The building section on the right-hand side of the street was provided with a two-storey base zone and a three-storey, vertically structured central area, to which the two-storey roof area with a titanium zinc pitched roof is connected. The building on the left also has a two-storey base area, but above it is a four-storey central area with glazed, large-format windows in segmental arches as a reference to early industrial modernism. This part of the building was given a staggered storey with a flat roof. Both houses received insulated glazed windows in thermally separated aluminium frames.
Following the Berlin building tradition, the courtyard sides have a reduced design, with smaller window openings and a composite thermal insulation system façade with clinker brick slips in the same colour spectrum as the street façades.
Both houses are accessible from Seestrasse. From the courtyard side, there is the possibility of direct access to the staircases. This access route also serves as an entrance to the courtyard-side car park and as a fire brigade access road.
Each of the two buildings has a centrally located, external staircase with a double flight of stairs. The ground floors of both buildings can be reached barrier-free from the street and courtyard side via the single-storey lobbies. Well-dimensioned passenger lifts ensure barrier-free access to all floors of both buildings. These lifts are also accessible from the underground car park.
With the construction of the new office building at Seestrasse, the areas facing the street were also redesigned. Vegetation areas with tree and shrub plantings lend character to the inner courtyard. In addition, 64 above-ground car parking spaces and 32 bicycle stands were created here.
TCHOBAN VOSS Architekten have construction projects all over Germany and in Russia. The offices plan, develop and build for regional and international clients within the public and the private sector.
Sergei Tchoban, born in Saint Petersburg, is a Russian-German architect., He studied architecture at the Russian Academy of Arts in Saint Petersburg. He is leading partner of TCHOBAN VOSS Architekten, Berlin as well as director of the architectural studio SPEECH in Moscow. Tchoban designed and built several internationally known buildings, such as the Federation Complex in Moscow. He curated twice the Russian Pavilion for the Architectural Biennale in Venice and in 2015 he was the architect of the Russian Pavilion for the EXPO in Milan. 2018 Sergei Tchoban received the European Prize for Architecture by Chicago Athenaeum: Museum of Architecture and Design.