0223 Marsiliusstraße:
Using existing resources and energies

Marsiliusstraße, Köln
Kölner Wohnungsgenossenschaften und
Wohnungsgesellschaften in Kooperation
mit der Stadt Köln, Stadtplanungsamt
Muck Petzet Architekten
Muck Petzet, Ksenija Zdesar,
Luis Hernandez, Callum McGregor
Ponnie Images

The residential block in the Marsiliusstrasse is not a typical case of urban densification in the sense of the goal of the competition: in the prize the proposed new built replacement will only allow for minimal expansions of living space; the surroundings are, similar to the existing building, 3-4 stories high; the perimeter of the block of the existing situation is already built up with high-quality architecture. Deconstruction does not open up new substantial surface areas.

We analysed the existing and it is a historically interesting case of an early building by a cooperative (late 1920s), which in the course of the reconstruction period of the 1950s was extensively renewed and modernised (roof, roof frame, kitchen and bathroom fittings). Thus it already consists of a modified building, moderately ‘historical’, that maintained the existing form language and was integrated into the neighbourhood. The building has an important value in shaping the identity of the cooperative and the neighbourhood. It was kept in good condition and supplemented with balcony and roof add-ons.

The Analysis of the residential floor plans resulted in: they are nicely cut out apartments that can be modernised with simple interventions. The apartments have separately accessible rooms without specified uses and an external kitchens connected to the living room. In the light of the renewed debates on building with reduced surface areas, the reduction of the living area and of differentiated uses of the floor plan indicate that the exiting apartments can be labelled as ‘modern’. The stairwells attest to the high standard of design and materialisation of the buildings, i.e. massive cast stone / terrazzo steps and curved balustrades. With regard to the building standards of a modest modernisation, the existing building should be protected.

In our proposal we pursue the following goals:
1.As much as possible, extensive use of existing resources and energy, i.e. historic, social, architectural, and physical (grey) energy. In this way, a maximum of use value and quality can be produced at minimal expense. (Ecological and economical effectiveness).
2.As much as possible, maximum utilization of the surface are by implementing 3 complete, and also independently applicable, expansion and upgrading strategies:
2.1Moderate Modernisation (perhaps possible while inhabitants remain). Single apartments can be brought up to new standards when new tenants come in. Existing high-quality finishing materials and details will be carefully worked over. With regard to energy, calcium silicate boards and window replacements are options to be investigated. In any case, insulation of the top and bottom floors as well as simple measures for technical facilities are to be taken.
2.2Expansion by topping up the parts of the building with 3 stories: without causing major changes to the urban fabric, an addition of ca. 16% surface area is possible.
2.3Extension through ‘inlay’ of high quality courtyard buildings in the courtyard, providing an additional 32% in surface area.

The new floor plans will expand and upgrade the existing offer of rather small apartments to family living spaces with direct access to the city.
With underground building works in the courtyard, the settlement problems of the existing stock can be removed and, simultaneously, new high-quality living spaces can be provided. We drew out an alternative which includes a new ‘courtyard floor’ with an additional underground parking garage planned underneath the courtyard floor. Marsiliusstrasse 52, which is most damaged by the settlement, can be replaced by a new car elevator and a new stairwell with a passenger elevator. Thus step-free access is at least guaranteed for existing building directly adjacent. We consider this selective new built replacement tenable – the new building will be designed as an attachment and assimilation to the ensemble.


Muck Petzet Architekten

Architekt BDA Dipl.-Ing. Muck Petzet
Landwehrstrasse 37
D - 80336 Munich
E-mail: sekretariat(at)muck-petzet.com

The architect Muck Petzet is member of
the Bayerische Architektenkammer
(Bavarian Architects Association),
Waisenhausstraße 4, 80637 Munich,
membership no. 172838.

The authorisation to use the professional
title "architect" arises from the inclusion
in the architects′ list of the Bavarian Architects
Association. The architect Dipl.-Ing
Muck Petzet is subject to the legislation
and professional regulation of the Bavarian
Architects′ Law (BayArchG). The text of
the BayArchG can be read on the homepage
of the Bavarian Architects Association

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