07_ACMS Architekten GmbH | Variowohnen Bochum



Project title: Variowohnen Bochum

Recommending party
The project has been submitted by:

ACMS Architekten GmbH, Wuppertal


Country: Germany

City: Wuppertal

Address:  Laerheidestraße 4-8
44799 Bochum


Designer or design team architects:

ACMS Architekten GmbH
Friedrich-Ebert-Straße 55
42103 Wuppertal

AKAFÖ, Akademisches Förderungswerk, Anstalt des öffentlichen Rechts, Bochum

Project control:
PSR Reiter und Reiter GbR, Bochum

Structural engineer:
Bild + Partner Beratende Ingenieure, Hagen

Building services:
Wortmann & Wember GmbH, Bochum

Landscape architect:
wbp Landschaftsarchitekten GmbH, Bochum

Timber construction
Rubner Holzbau GmbH, Augsburg

Colour planning:
Farb-Bau, Prof. Friedrich Schmuck, Dinslaken

DGNB certification:
MNP Ingenieure, Lübeck

Sigurd Steinprinz, Düsseldorf


Plot area – Superficie lotto: 12.960 mq

Gross Area – Superficie lorda totale: 11.700 mq

Of which
residential – Di cui Residenziale:
% 91

Public/communal areas – Spazi collettivi/comuni: % 9

Facilities for the public – Attrezzature pubbliche: % 0

Business/trade – Commerciale: % 0

Offices – Uffici: % 0

Number of residential units – Numero di alloggi: 258

Typology of users – Tipologia di utenti:

Families – Famiglie
Students – Studenti
Foreigners/immigrants – Stranieri o immigrati
Temporary residents – Residenza temporanea

Total building costs Euros – Costo di costruzione totale in Euro: 23139500

Building Cost = Total Bulding Cost / Gross Area – Costo di costruzione = Costo di costruzione totale /Superficie lorda totale: € 1977,74

Floor area ratio = Gross Area / Plot Area – Densità = Superficie lorda totale /Superficie lotto: 0,90

Work started on date – Data inizio lavori: Monday, 4th December 2017

Work completion date – Data ultimazione lavori: Monday, 3rd February 2020


AKAFÖ, Akademisches Förderungswerk, Anstalt des öffentlichen Rechts, Bochum

Allotment rule – Regola di assegnazione:

AKAFÖ, Akademisches Förderungswerk, Anstalt des öffentlichen Rechts, Bochum. The flats are offered to people with low incomes. Proof is generally provided by means of a certificate of eligibility for housing. In this case, the apartments are currently intended for students of the Ruhr-University Bochum.

Reduction cost percentege compared to the market value – Percentuale di riduzione di costo rispetto al valore di mercato

assignement %: 100

rent %: 35


The construction costs are within the fluctuation range of the “Statistical Cost Parameters”. Even with the above-average residential quality provided in this building project, the construction costs are only 13% above average and 7.5% below maximum.

Rental/sale cost compared to market price
Costo di affitto/ vendita rispetto al mercato

Within the framework of publicly subsidised housing, a rent ceiling is set by the funding body. A flat of approx. 28m² is offered with a warm rent, i.e. including all ancillary costs, of 280 EUR/month, significantly below the local rents.

Rules of allocation – Regole di assegnazione
The flats are offered to people with low incomes. Proof is generally provided by means of a certificate of eligibility for housing. In this case, the apartments are currently intended for students of the Ruhr University Bochum

Protection of fragile categories
Tutela categorie fragili

The aim is to ease the housing market in conurbations and to be able to offer affordable housing for students, trainees, pensioners and immigrants. The flats are use-neutral and have a low warm rent.

Involvement of inhabitants in the building process – Coinvolgimento degli abitanti nel processo
The future users were involved in the processes at an early stage. With such small spatial conditions, it is important to create the greatest possible acceptance, which can be achieved above all through high interior variability and various uses.

Community accompaniment in the life of the building – Accompagnamento della comunità nella vita dell’edificio:
The operator provides tutors for the residents who supervise various activities. Especially in a housing complex with a large number of changing single households, the promotion of community activities is of great importance.


Functional mixitè – Mix funzionale:
In addition to the guaranteed individual rooms, there are numerous communal areas that can be used variably. This was the only way to implement the drastic reduction in living space per person. In addition, sports and recreation areas are available in the outdoor areas.

Common spaces and shared living-Spazi comuni e abitare condiviso:
The existing infrastructure of the Ruhr-Universität Bochum with public transport, car parks, gastronomy, library and seminar rooms is complemented by the facilities in the residential complex. Of course, these areas are also available to the public.


The sustainability assessment includes the holistic evaluation of economic, ecological and socio-cultural concerns. In the spirit of the DGNB (German Sustainable Building Council), the building is awarded the Gold Standard.

Description of the project:

The new buildings revitalise a former mining site. Within the framework of the Variowohnen funding programme, 258 places for students could be realised. With this programme, the Federal Ministry of the Interior aims to create affordable housing for students, trainees and senior citizens as part of the research initiative Zukunft Bau. The project was funded as an outstanding project with the maximum funding amount.

The three L-shaped buildings are each accessed by an external staircase located in the corner area. Adjacent to this is a 2-bay building section with east-west oriented living spaces and a 1-bay building section with south orientation. This creates three inner courtyards facing the sun and shielded from the 4-lane University Road. All living spaces are barrier-free and have been organised into 1, 2 and 4-bed flats. Each floor has an additional communal living and working space with kitchen use. Common rooms are available as learning and recreation rooms.

The buildings are designed as hybrid constructions in order to achieve a high degree of flexibility and convertibility as well as time-saving and quality-assuring prefabrication. A shell construction with wide-span prestressed concrete hollow ceilings on steel beams and prefabricated concrete columns allows for the greatest flexibility. Despite the fire class B1 required by the national building regulations, wood could be used as a cost-effective and CO2-binding material. This was made possible by a corresponding exemption based on the technical building regulations introduced in Switzerland since 2005.

The non-load-bearing exterior walls as prefabricated timber panel walls result in fast construction times with the highest insulation standards and a CO2 saving of over 400 t compared to solid construction methods. The compact construction and good orientation towards the sun enabled the economic implementation of a passive house. A photovoltaic system was installed to further reduce primary energy expenditure. Within the framework of the DGNB overall rating in gold, even the highest rating level in platinum is achieved in the area of ecology with a degree of fulfilment of over 83%. In order to document the innovative approaches from the funding programme, the entire planning and construction phase was scientifically evaluated. The aim is to derive transferable recommendations for action.