Wohnbau Mainz
Wohnbau Mainz is the municipal housing company of the city of Mainz and its largest and most affordable residential landlord.
Last updated September 26, 2026
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Overview
Wohnbau Mainz is the municipal housing company (kommunale Wohnungsbaugesellschaft) of the city of Mainz in Rhineland-Palatinate, Germany. With more than 11,000 apartments across the entire city area and more than 250 employees, it describes itself as the largest housing provider in the state capital and, for many residents, a reliable partner for their home for decades. Its stated mission is to create affordable housing, develop neighbourhoods and ensure that people can feel at home in Mainz over the long term. The company was founded in 1917, during the First World War, under Mayor Karl Göttelmann. Its first apartments were built after the war on the right bank of the Rhine, where the Kostheim settlement quickly took shape with large green spaces and small terraced houses inspired by the garden city movement. By the start of the Second World War the company owned 1,256 apartments on both sides of the Rhine, many of which were destroyed in the bombing of the final war days. Residential construction in Mainz only regained momentum in the early 1950s, after which it advanced rapidly; large housing estates arose on the edges of the city and Wohnbau Mainz was involved in almost every area of Mainz's urban development. Today Wohnbau Mainz focuses on renting apartments. It also manages commercial properties, parking and parking spaces, and develops neighbourhoods. Its portfolio includes multi-generational houses and project-based housing concepts, such as the award-winning Mehrgenerationenwohnen in the Mainz Neustadt opened in 2005 and the "Zuhause in Mainz – miteinander sorgenfrei leben" projects that combine independent living, care security and lived neighbourhood. The company has received the State Prize for Architecture and Housing of Rhineland-Palatinate, including in 2007 for the Dreikönigshof and nine courtyard houses in Mainz-Hechtsheim, and in 2018 for the "Am Cavalier Holstein" residential complex. Ownership is municipal. According to the company's own information, shareholders are the City of Mainz (10.1%), the Städtische zentrale Beteiligungsgesellschaft, ZBM (79.7%), and RIO Energieeffizienz GmbH und Co. KG (10.2%). The management board consists of Roman Becker and Astrid Fath. The company is headquartered at Dr.-Martin-Luther-King-Weg 20 in Mainz. It is not listed on a stock exchange and operates as a municipal housing company. Wohnbau Mainz has played a significant role in Mainz's urban development, contributing to the renovation of the old town through projects such as the extension of the Gutenberg Museum, the new building and renovation of the "Frankfurter Hof", and the conversion of historic buildings including the "Proviant-Magazin", the historic market houses (architect and designer Massimiliano Fuksas) and the former wholesale department store Etex into the "Wohnpark am Kupferberg". In 2009 the company completed a new office and commercial building with a parking garage at "Am Bahnhof Mainz Römisches Theater", the former Südbahnhof.
History
Wohnbau Mainz was founded in 1917, still during the First World War, under Mayor Karl Göttelmann. Its first apartments were built after the end of the war on the right bank of the Rhine. There the Kostheim settlement quickly took shape, with large green spaces and small terraced houses modelled on the garden city movement, offering contemporary two-room apartments with a kitchen-living room, toilet and bathroom as a new home for families. By the beginning of the Second World War the company owned 1,256 apartments on both sides of the Rhine, many of which were destroyed in the bombing of the final days of the war. Residential construction in Mainz only regained momentum in the early 1950s, after which it advanced rapidly. Large residential areas arose on the edges of the city, and Wohnbau Mainz was involved in almost all areas of Mainz's urban development. In 2009 a significant financial crisis at the company came to light. Triggered by mismanagement and exacerbated by the financial crisis, Wohnbau Mainz had problems obtaining new loans for expiring loans. The heavily indebted company was close to collapse, but the City of Mainz agreed to provide a guarantee of 300 million euros. This made it possible to obtain new credit and initiate a restructuring. The supervisory and service directorate in Trier, which had to approve the guarantee, approved it but demanded that material costs in the new company be significantly reduced and the number of staff substantially decreased. The latter was implemented. Indebtedness was reduced by selling 2,800 apartments in the right-bank Rhine area to the state capital Wiesbaden even before the new founding. The City of Wiesbaden then withdrew from the company at the end of 2009, as did Landesbank Baden-Württemberg. On 1 December 2009 the new Wohnbau Group began work. The company now concentrated on apartment rental. Other business areas such as operating restaurants, the property developer business and the development of commercial real estate were abandoned. The roughly 10,500 apartments held in the portfolio within the Mainz city area were transferred to the new subsidiary WB Wohnraum Mainz GmbH & Co. KG as part of the organisational restructuring. A second subsidiary, WB Gewerbeimmobilien Mainz GmbH & Co. KG, took over around 300 commercial units intended for sale. The third company in the group, WB Services GmbH, looked after the technical management of the apartments and residential complexes with its craftsmen and caretakers. On 1 January 2019 Wohnbau Mainz dissolved the two subsidiaries WB Wohnraum Mainz GmbH & Co. KG and WB Gewerbeimmobilien Mainz GmbH & Co. KG and merged them back into Wohnbau Mainz GmbH. The company is today economically successful again and the largest and cheapest housing provider in Mainz. Shareholders are the City of Mainz (89.8%) and Rio Energieeffizienz GmbH und Co. KG (10.2%). Alongside apartments, houses and commercial properties in all city districts, Wohnbau Mainz maintains several multi-generational houses and objects based on a project idea. In the Mainz Neustadt the company opened a multi-award-winning multi-generational housing project in 2005. Under the motto "Zuhause in Mainz – miteinander sorgenfrei leben", further housing projects are being created that combine independent living, care security and lived neighbourhood. So far there are three such projects in the districts of Hartenberg-Münchfeld, Mombach and Ebersheim. More are planned. Projects include the conversion area "Alte Artilleriekaserne" Gonsenheim with about 1.7 ha; the Dreikönigshof on the Kästrich in the former Schöfferhof/Dreikönigshof brewery with partial preservation of the facades from 1889; the "An der Bruchspitze" housing project between Mainz-Mombach and Mainz-Gonsenheim; the "Pfarrer-Brantzen-Straße" residential quarter in the "Am Großen Sand" residential area, a conversion area between Mombach and Gonsenheim; "Zuhause in Mainz – miteinander sorgenfrei leben"; and the socio-cultural centre of the Neustadt Kulturbäckerei. For two projects (Dreikönigshof and nine courtyard houses in Mainz-Hechtsheim) Wohnbau Mainz received a State Prize for Architecture and Housing of the State of Rhineland-Palatinate in 2007. The multi-generational housing in the Mainz Neustadt received an acknowledgement. For the "Am Cavalier Holstein" residential complex (Zuhause in Mainz, 2016) the company received the State Prize for Architecture and Housing 2018. Wohnbau Mainz contributed to the renovation of the old town through the extension of the Gutenberg Museum, the new building and renovation of the "Frankfurter Hof", as well as the new building and modernisation of houses and housing projects in Gaustraße, Fischergasse, Augustinergasse and -gässchen, Weißliliengasse, Heringsbrunnengasse and Fischtorstraße. In addition, through the purchase, renovation and redesign of historic buildings such as the "Proviant-Magazin", the redesign of the historic market houses (architect and designer: Massimiliano Fuksas), and the conversion of the former wholesale department store Etex into the "Wohnpark am Kupferberg" with partly listed facades from the years between 1860 and 1880 on Breidenbacher-Straße, Wohnbau Mainz made a decisive contribution to the cityscape. In 2009 the new building of an office and commercial building including a parking garage "Am Bahnhof Mainz Römisches Theater", the former Südbahnhof, was completed. As of 1 December 2009 Wohnbau had a housing stock of 10,500 rental apartments. Today the company reports over 11,000 apartments and more than 250 employees, making it the largest housing provider in the state capital.
- 2019
On 1 January 2019 the subsidiaries WB Wohnraum Mainz GmbH & Co. KG and WB Gewerbeimmobilien Mainz GmbH & Co. KG are dissolved and merged back into Wohnbau Mainz GmbH.
- 2018
Receives the State Prize for Architecture and Housing 2018 for the "Am Cavalier Holstein" residential complex.
- 2016
"Am Cavalier Holstein" residential complex (Zuhause in Mainz) completed.
- 2009
Financial crisis; City of Mainz provides a 300 million euro guarantee; restructuring and new Wohnbau Group begins work on 1 December 2009.
- 2009
City of Wiesbaden and Landesbank Baden-Württemberg withdraw from the company at the end of 2009.
- 2007
Receives the State Prize for Architecture and Housing of Rhineland-Palatinate for the Dreikönigshof and nine courtyard houses in Mainz-Hechtsheim.
- 2005
Opens a multi-award-winning multi-generational housing project in the Mainz Neustadt.
- 1950
Residential construction in Mainz regains momentum in the early 1950s; large housing estates arise on the city edges.
- 1939
By the start of the Second World War the company owned 1,256 apartments on both sides of the Rhine.
- 1925
Construction of the Fichteplatz settlement begins (completed 1928), a heritage-listed social housing project.
Products and positioning
The largest and most affordable housing provider in Mainz, a municipal company responsible for affordable housing and neighbourhood development.
Rental apartments
Over 11,000 apartments across the Mainz city area.
Commercial properties
Commercial units and properties in Mainz.
Parking and parking spaces
Parking and parking spaces offered to tenants and others.
Multi-generational housing
Projects combining independent living, care security and neighbourhood.
Sources5 sources
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