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Gemeinnützige Wohnungsbaugesellschaft Wuppertal

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Wuppertal's largest municipal housing company, owning and managing over 5,600 apartments and roughly 40,000 m² of commercial space.

Last updated September 26, 2026

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Overview

The Gemeinnützige Wohnungsbaugesellschaft mbH Wuppertal (GWG) is a housing company headquartered in Wuppertal, Germany, and the largest residential landlord in the Wuppertal area. It was founded in January 1937 by Wilhelm Vorwerk as the Gemeinnützige Kleinwohnungsbaugesellschaft mbH, originally focused on building and managing workers' housing. In 1969 it was renamed Gemeinnützige Wohnungsbaugesellschaft (GWG), the name under which it has operated since. The company took over municipal apartments and built its own buildings, growing into Wuppertal's largest housing enterprise. Its construction projects have included the large Domagkweg development in Uellendahl, hundreds of social housing units across Wuppertal, a residential complex in Ronsdorf, and the Heidter Carré new-build project in Wuppertal-Heckinghausen. GWG's business centers on renting and managing apartments and commercial premises in Wuppertal, technical support for construction projects, and project management. Its portfolio includes more than 5,600 apartments, among them 120 senior service apartments, 1,300 low-barrier and 300 barrier-free units, as well as 49 playgrounds and around 40,000 m² of commercial space. It also operates the An der Hardt service residential complex and offers senior-friendly, barrier-free housing and supplementary housing forms for people needing support, including dementia shared-living communities. In 2023 GWG generated revenue of €41.2 million with around 74 employees, and its apartment vacancy rate stood at 1.5%. The company is majority-owned by the City of Wuppertal with 75% of shares; GWG itself holds 21% and Stadtsparkasse Wuppertal holds the remaining 4%. Managing director is Oliver Zier, with Sedat Ugurman as chairman of the supervisory board and Klaus Jürgen Reese as deputy chairman. GWG has weathered serious crises: the 1998 GWG scandal brought nationwide headlines over embezzlement, fraud and bribery allegations involving actors outside the company, with some GWG projects sold at heavily inflated prices and a 20-year rent guarantee for a senior facility causing major losses. Debt subsequently rose to €300 million, roughly half from interest burdens, and GWG received a rescue loan of about €60 million in 2012. In 2017 the City of Wuppertal provided a further €58 million capital injection to prevent a loss-making sale. Through structural reorganization and selective property sales, GWG has been profitable since 2018 and raised its equity ratio from around 2% to over 25%. Today GWG is active in neighborhood development and social infrastructure. A long-term program launched in 2023 aims to equip as many buildings as possible with solar systems and heat pumps over the next 20 years, with a planned investment volume of around €116 million. In August 2023 it opened a new customer center in Elberfeld after fully renovating and modernizing its previous company building. Also in 2023, the Heidter Carré new-build complex with 30 residential units and an integrated daycare center was completed on the former Bremme Brauerei site, with the daycare created in cooperation with Arbeiterwohlfahrt (Awo). GWG received the Digitalpioniere der Wohnungswirtschaft award in 2023 for its digital vacancy renovation project. In August 2024 it began modernizing the Wohnpark Schellenbeck estate, comprehensively renovating four high-rises and five row buildings from 1968 with facade energy upgrades, photovoltaic systems, geothermal heating, roof greening and technical infrastructure renewal.

History

The Gemeinnützige Wohnungsbaugesellschaft mbH Wuppertal (GWG) was founded in January 1937 by Wilhelm Vorwerk as a housing company in Wuppertal. It initially operated as the Gemeinnützigen Kleinwohnungsbaugesellschaft mbH, focused on the construction and management of workers' housing. In 1969 it was renamed Gemeinnützige Wohnungsbaugesellschaft (GWG), the name under which it has operated since. GWG took over municipal apartments and erected its own buildings, becoming the largest housing company in Wuppertal. Its buildings included the large Domagkweg project in Uellendahl, the construction of hundreds of social housing units in Wuppertal, a residential complex in Ronsdorf, and the Heidter Carré new-build project in Wuppertal-Heckinghausen. In 1998 the company became the focus of nationwide headlines through the GWG scandal, in which various actors outside the company were accused of embezzlement, fraud and bribery. Individual GWG projects had been sold at heavily inflated prices. Among other things, a 20-year rent guarantee was signed for a senior facility in Wuppertal, leading to high losses. Many of the accused were sentenced to varying prison terms and fines. GWG received compensation payments amounting to several million euros. Since the scandal, GWG's debt grew to €300 million, roughly half attributable to interest burdens. To rescue GWG, it received a loan of around €60 million in 2012. In 2017 GWG received another capital injection of €58 million from the City of Wuppertal, its largest shareholder, to prevent a loss-making sale of GWG. Through structural reorganization and individual property sales, GWG has generated profits since 2018 and was able to raise its equity ratio from around 2% to over 25%. GWG carries out measures for the energy-efficient modernization of its housing stock. A long-term program started in 2023 aims to equip as many buildings as possible with solar systems and heat pumps within the next 20 years. The planned investment volume is around €116 million. In August 2023 GWG opened a new customer center in Elberfeld, for which the previous company building was completely rebuilt and modernized. The company is also active in neighborhood development and the creation of social infrastructure. In 2023, among other things, the Heidter Carré new-build complex with 30 residential units and an integrated daycare center was built on the old site of the Wuppertaler Bremme Brauerei. In cooperation with Arbeiterwohlfahrt (Awo), a daycare center was created there with over 760 m² of interior space and a terrace area of around 400 m². The spatial concept was designed in collaboration with the daycare center's pedagogical staff and includes various themed rooms. In 2023 GWG received the Digitalpioniere der Wohnungswirtschaft award for the project Leerwohnungssanierung A bis Z – digital und kundenorientiert in cooperation with application developer Leo. The application enables mobile, digital commissioning of vacancy renovations. The award has been presented since 2022 by the magazine Die Wohnungswirtschaft and the companies Blackprint, DigiWoh and PropTechs Kiwi. In August 2024 GWG began modernizing its Wohnpark Schellenbeck building stock on Agnes-Miegel-Straße. Since then, four high-rises and five row buildings from 1968 have been comprehensively renovated. The modernization measures include energy-efficient facade renovation, installation of photovoltaic systems, geothermal-based heat supply, roof greening, and technical renewal of the infrastructure within the buildings. Due to the temporary relocation of tenants required, GWG developed a tenant promise as well as accompanying information and support services for tenants. In October 2024 the project was funded by the Ministry for Home Affairs, Municipal Affairs, Construction and Digitalization of the State of North Rhine-Westphalia. In 2025 it also received an award within the framework of the KlimaQuartier.NRW standard with the 'Städtebauplus' seal of the State of North Rhine-Westphalia.

  • 2025

    Wohnpark Schellenbeck project awarded 'Städtebauplus' seal under KlimaQuartier.NRW standard.

  • 2024

    Begins comprehensive modernization of Wohnpark Schellenbeck; project funded by North Rhine-Westphalia ministry in October.

  • 2023

    Launches long-term energy modernization program with planned investment of around €116 million; opens new customer center in Elberfeld; completes Heidter Carré with 30 units and daycare; wins Digitalpioniere der Wohnungswirtschaft award.

  • 2018

    GWG returns to profit through structural reorganization and property sales.

  • 2017

    City of Wuppertal provides €58 million capital injection to prevent a loss-making sale.

  • 2012

    Receives a rescue loan of around €60 million.

  • 1998

    GWG scandal brings nationwide headlines over embezzlement, fraud and bribery allegations.

  • 1969

    Renamed Gemeinnützige Wohnungsbaugesellschaft (GWG).

  • 1937

    Founded in January by Wilhelm Vorwerk as Gemeinnützigen Kleinwohnungsbaugesellschaft mbH.

Products and positioning

Wuppertal's largest housing provider, combining affordable rental housing with neighborhood development, energy modernization and social infrastructure.

  • Rental apartments

    Over 5,600 apartments in Wuppertal, including 120 senior service apartments, 1,300 low-barrier and 300 barrier-free units.

  • Commercial space

    Around 40,000 m² of commercial space managed in Wuppertal.

  • Senior service residential complex An der Hardt

    Service residential complex and senior-friendly barrier-free housing, including dementia shared-living communities.

  • Heidter Carré

    New-build complex with 30 residential units and an integrated daycare center on the former Bremme Brauerei site.

  • Playgrounds

    49 playgrounds in the portfolio.

Sources3 sources

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