Wiener Wohnen Kundenservice

What Wiener Wohnen Kundenservice does

Stadt Wien – Wiener Wohnen Kundenservice GmbH (WrWKS) is a 100%-owned municipal subsidiary of the City of Vienna, founded in 2002 as a one-person call-centre operation and grown into a 1,150+-employee service company. It delivers construction project management, communication services, and IT/support functions to Stadt Wien – Wiener Wohnen — Europe's largest municipal housing operator, which manages ~220,000 apartments, ~1,800 buildings, and ~13 million m² of residential space — and to other City of Vienna entities under formal B2G contracts. Operationally, WrWKS plans and supervises approximately 300 construction projects totalling ~1.26 million m², runs a 24/7 tenant service line handling ~900,000 calls per year (~3,000 answered within 20 seconds on weekdays), and reviews ~200,000 invoices annually across small and large construction defects.

The company's technology stack comprises Java/Kotlin with Spring Framework, React/TypeScript frontends, PostgreSQL, Apache Kafka event-driven pipelines, Kubernetes-based DevOps (Jenkins, Maven, Git, SonarQube, Helm), and SAP across FI, CO, MM, SD, HCM, BI, SAC, and SuccessFactors modules. Proprietary or domain-specific capabilities include a Construction Project Management Platform, a Befundmanagement findings system, a Mieter*innenportal (tenant portal), in-house SAP consulting, decarbonisation coordination for the City of Vienna's gas-exit-by-2040 mandate (#rausausgas), 3D-scanner-based vacant apartment measurement, and self-hosted Matomo analytics for GDPR compliance. Magnolia CMS and Atlassian Confluence/Jira support content and project management.

WrWKS generates revenue exclusively through formal customer contracts (68 contracts across 7 product groups) with the City of Vienna corporate group, primarily Wiener Wohnen, under Austrian public procurement frameworks. The GTM motion is enterprise/B2G direct contract delivery; new engagements are acquired via public tender or direct municipal negotiation. The company holds family-friendly employer certification, the 2024 BGF-Gütesiegel for occupational health, and the Best-Recruiter-Siegel in Silber 2024, reflecting sustained investment in workforce and employer brand.

Name

Wiener Wohnen Kundenservice

Legal name

Stadt Wien – Wiener Wohnen Kundenservice GmbH

Website

https://wrwks.at

Company type

Private

Founded year

2002

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

WrWKS is a 100%-owned City of Vienna subsidiary delivering construction project management, communication services, and IT support to Vienna's municipal housing authority managing 220,000 apartments, employing over 1,150 staff across three service lines.

Ownership category

akta.pro rank

Product category

Municipal Housing Services

NAICS

Nonresidential Building Construction (2362)

SIC

General Bldg Contractors - Residential Bldgs (1520), Operators Of Apartment Buildings (6513)

akta.pro primary industry

Building Automation & Controls (BAS/BMS) Contracting (IMAFALAE)

akta.pro secondary industry

Build-to-Rent (BTR) Community Management (BPAJAFAC)

Keywords

• Municipal housing services
• Construction project management
• Tenant communication services
• Public sector IT services
• Social housing management

Headquarters

HQ city

Vienna

HQ country

Austria

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. Municipal Service Contracts: WrWKS operates under formal customer contracts (68 customer contracts across 7 product groups) with Stadt Wien – Wiener Wohnen and other City of Vienna entities. Revenue is generated through contracted service fees for construction management, communication services, IT services, and support functions. As a wholly-owned municipal subsidiary, pricing is negotiated within the public sector framework.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

WrWKS delivers contracted construction services (project planning, building supervision, renovation and decarbonisation management, invoice auditing) and communication services (24/7 tenant call centre, tenant portal, social case management) primarily for Stadt Wien – Wiener Wohnen, which manages approximately 220,000 municipal apartments. The company also provides in-house SAP consulting, IT solutions and shared support functions for other City of Vienna entities across 68 customer contracts in seven product groups.

Product overview

Stadt Wien – Wiener Wohnen Kundenservice GmbH (WrWKS) is a 100% subsidiary of the City of Vienna that provides comprehensive construction and communication services primarily for Wiener Wohnen (Vienna's municipal housing authority). The company does not offer a commercial product or software platform to external customers; rather, it delivers internal services including building services (Bauserices), communication services (Kommunikations-Services), and support functions. Its operational infrastructure includes SAP (FI, CO, MM, SD, HCM, BI, SAC, SuccessFactors) for enterprise resource planning, Magnolia CMS for content management, Atlassian Confluence and Jira for documentation and project management, and Microsoft 365 tools including Power BI for business intelligence. The company manages approximately 220,000 municipal apartments across Vienna, providing tenant services, building renovation management, and social housing support.

Differentiator

Problem solved

Functional benefit

Products and services

• Bauservices & Sanierungsmanagement (Construction Services & Renovation Management) End-to-end construction project management for Vienna's municipal housing portfolio, covering approximately 300 individual projects totalling roughly 1.26 million m² across planning, building supervision, renovation, invoice auditing and decarbonisation coordination. Delivered under formal contracts to Stadt Wien – Wiener Wohnen.
• Kommunikationsservices (Communication Services) 24/7 tenant-facing communication services for Wiener Wohnen, including the Wiener Wohnen Service Number 05 75 75 75 (handling approximately 900,000 calls annually with about 3,000 answered within 20 seconds on weekdays), the Mieter*innenportal tenant portal, social case management and eviction prevention support for municipal housing residents.
• IT- & SAP-Lösungen (IT and SAP Solutions) In-house SAP consulting and development across FI, CO, MM, SD, HCM, BI, SAC and SuccessFactors modules, plus internal web applications and digital strategy support for the Wiener Wohnen corporate group and other City of Vienna entities.
• Befundmanagement (Findings Management) System for managing building condition assessments and findings, supporting safe building operation and legal compliance for municipal housing residents. Approximately 200,000 invoices from small to large construction defects are reviewed annually.
• 3D-Scanner-gestützte Leerwohnungs-Vermessung (3D-Scanner Vacant Apartment Measurement) Service using 3D scanning technology to measure vacant apartments for renovation planning and documentation in Wiener Wohnen's housing stock.
• Dekarbonisierungs-Koordination / #rausausgas (Decarbonisation Coordination) Development and coordination services for the decarbonisation of municipal housing, supporting the City of Vienna's goal to exit gas heating by 2040.

Quantifiable outcome

• ~87% energy savings in Gregorygasse renovation (197.30 kWh/m²·a reduced to 26.60 kWh/m²·a)
• +5 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Five partnerships are on record, tiered core and minor.

• IT der Stadt Wien – Wiener Wohnen Kundenservice GmbHcoreTechnology or IntegrationInternal IT service provider within the Wiener Wohnen group, providing technology infrastructure and services. Data processor under GDPR Art. 28.
• Camillo Sitte BautechnikumminorOthersVocational school (HTL) with a focus on civil engineering and construction, with which WrWKS cooperates for recruitment purposes, providing career information and internship opportunities.
• HTL MödlingminorOthersHigher technical college with which WrWKS cooperates for recruitment, providing career information and internship opportunities for students in technical fields.
• Wien Work-integrative Betriebe und AusbildungsgmbHminorStrategic or Co-development PartnerNon-profit social enterprise housed within the new Preßgasse/Schäffergasse municipal housing development, providing integrative employment and training services for residents.
• PEKS (Fabian Hämmerle)minorStrategic or Co-development PartnerStreet artist Fabian Hämmerle (alias PEKS) co-designed community spaces at the Preßgasse/Schäffergasse development with painted Pawlatschen (courtyard galleries) featuring inspirational phrases.

Scale indicators11 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• COOR Service Management: Nordic-based integrated facility management (IFM) provider delivering multi-service bundles (construction, technical maintenance, soft services) to large public and private clients under multi-year contracts. WrWKS is comparable as a bundled services provider to a single large anchor client (City of Vienna) with multi-disciplinary service lines and long-duration contract structure.
• Drees & Sommer: German construction project management and real estate consulting firm. WrWKS is comparable because its Bauservices & Sanierungsmanagement business — covering architecture, building supervision, invoice auditing, and project management across ~300 construction projects — mirrors Drees & Sommer's core project management consulting model for large publicly-funded building programmes.
• Caverion Corporation: Nordic building solutions and facility services provider covering HVAC, technical building services, and energy solutions for public and commercial buildings. WrWKS is comparable through its construction services, building condition assessments (Befundmanagement), and decarbonisation coordination for municipal housing stock — overlapping use cases in building lifecycle services.

Broad incumbents

• STRABAG SE: Austria-headquartered European construction group with significant public-sector building construction and civil engineering exposure. WrWKS is comparable in construction project management for publicly-funded municipal buildings, though STRABAG also performs underlying trade work at significantly larger scale.
• Gegenbauer: German integrated facility management company serving public-sector and commercial clients across Germany and Austria. WrWKS is comparable as a bundled facility/construction services provider to public-sector clients, though Gegenbauer operates with broader geographic footprint and more private-sector exposure.
• Bilfinger SE: German-based industrial services and facility management provider serving process industry, power, and public-sector clients across Europe. WrWKS is comparable as a facility and construction services provider to public-sector clients, though Bilfinger operates at significantly larger scale and broader geographic scope.
• VINCI Facilities: European facility management and building solutions business within VINCI Group, serving public and private clients with bundled construction, technical maintenance, and energy services. WrWKS is comparable through its multi-disciplinary service delivery to a municipal anchor client, though VINCI Facilities operates at much broader scale across multiple geographies.
• Hochtief AG: German-based global construction group with significant public-sector infrastructure and building construction exposure, including PPP concession management. WrWKS is comparable in construction management for publicly-funded municipal buildings, though Hochtief operates at vastly larger scale and broader geographic scope.
• Wiener Stadtwerke: Vienna municipal holding company that owns and operates public utilities, public transport, and municipal real estate services. WrWKS is comparable as a wholly-owned subsidiary of the City of Vienna providing contracted services to municipal entities under public-procurement frameworks — sharing ownership structure and B2G service model.

Regional players

• SAGA Hamburg: Hamburg municipal housing company managing ~135,000 apartments for the City of Hamburg. WrWKS is comparable through its exclusive service relationship with Wiener Wohnen (220,000 apartments) — both are publicly-owned housing service operations in German-speaking cities, though SAGA operates its own in-house service delivery rather than contracting to a subsidiary like WrWKS.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/stadt-wien-wiener-wohnen-kundenservice-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Wiener Wohnen Kundenservice