Rhomberg Bau GmbH

What Rhomberg Bau GmbH does

Rhomberg Bau GmbH is a full-service construction and real estate company headquartered in Bregenz, Austria, and operating as part of the diversified Rhomberg Gruppe. Founded in 1886, the company covers the entire building lifecycle for both public and private clients — from site search and real estate development through general and total contracting, timber and traditional construction, renovation, and post-completion property management. Its geographic footprint spans Austria (Bregenz HQ and Vienna operations), Germany, Switzerland (via Rhomberg Bau AG in St. Gallen), and Liechtenstein.

The company's technology stack centers on Holzsystembau (timber system construction), a prefabricated modular approach applicable to multi-story residential, commercial, healthcare, educational, and hotel buildings, including serial thermal renovation. It is vertically integrated into raw materials via the Steinbruch Hohenems quarry and into end-of-life building services through demolition, recycling, and disposal operations. The Rhomberg Energie division extends the offering into building-integrated photovoltaics, rooftop PV, EV charging infrastructure, wood-hybrid PV carports, and energy and load management.

The business model combines project-based construction contracts (with fixed-price guarantees), real estate development for sale and rental (including the branded DAVID Microliving product line), and hardware-plus-service revenue from energy and building materials. Customers span housing associations, public infrastructure agencies (ASFINAG, ÖBB), large commercial real estate developers (Swiss Prime Site, UBS), tourism operators, and private individuals, with distribution handled through regional direct sales offices in each operating market. Revenue is not publicly disclosed, and the company is privately held under the Rhomberg Gruppe conglomerate.

Name

Rhomberg Bau GmbH

Legal name

Rhomberg Bau GmbH

Website

https://rhomberg.com

Company type

Private

Founded year

1886

Operating status

Operating

Headcount range

11–50 employees

Short description

Rhomberg Bau GmbH is a full-service Austrian construction and real estate company offering general contracting, timber system construction, renovation, energy solutions, and property development across Austria, Germany, Switzerland, and Liechtenstein for public, commercial, and residential clients.

Ownership category

akta.pro rank

Product category

Construction Services

NAICS

Construction (23), Nonresidential Building Construction (2362), Building Equipment Contractors (2382)

SIC

General Bldg Contractors - Nonresidential Bldgs (1540), General Bldg Contractors - Residential Bldgs (1520), Construction - Special Trade Contractors (1700)

akta.pro primary industry

Commercial General Contracting (New Build) (IMAFAAAA)

akta.pro secondary industries

Residential General Contracting (New Build) (IMAFAAAB), Office & Corporate Building Construction (IMAFACAA), Energy & Renewables Specialty Contracting (Solar PV, Storage, EV Charging) (IMAFALAJ)

Keywords

• Construction services
• Timber construction
• Building renovation
• Real estate development
• Energy solutions

Headquarters

HQ city

Bregenz

HQ country

Austria

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales

Revenue model

1. Construction Services: General contractor and total contractor services for new construction, renovation, and modernization of residential, commercial, and industrial buildings. Revenue generated through project-based contracts with fixed-price guarantees.
2. Real Estate Development: Property development including site identification, project development, developer services, and residential property sales. Own property developments for sale and rental.
3. Raw Materials, Building Materials and Recycling: Operation of Steinbruch Hohenems quarry, production of concrete and asphalt products, demolition and recycling services.
4. Energy Solutions: Rhomberg Energie division offering energy concepts, photovoltaic systems (roof and facade-integrated), charging solutions for electromobility, and energy management services.
5. Property Management Services: Property consulting and management services, property administration, and integrated planning.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels6 records

Core offering

Rhomberg Bau GmbH is a full-service construction provider operating as part of the Rhomberg Gruppe. The company delivers general and total contracting, structural and civil engineering, renovation and modernization, real estate and site development, timber system construction (Holzsystembau), energy solutions (photovoltaics, EV charging, energy management), and building materials (quarry, asphalt, concrete, recycling) for residential, commercial, and public sector projects across Austria, Germany, Switzerland, and Liechtenstein.

Product overview

Rhomberg Bau GmbH is a full-service construction company and complete solutions provider operating as part of the internationally active Rhomberg Gruppe. The company offers a comprehensive portfolio of construction and real estate services spanning the entire lifecycle of public and private buildings. The core offerings include general and total contracting services (General- & Totalunternehmer), building construction (Hochbau & Tiefbau), renovation and modernization (Umbau und Sanierung), and real estate and location development (Immobilien- und Standortentwicklung). The company differentiates through its specialized energy division (Rhomberg Energie) offering integrated energy solutions including rooftop photovoltaics (Dach-Photovoltaikanlagen), building-integrated photovoltaics (Fassadenintegrierte Photovoltaik), EV charging solutions, and energy management systems. Additional branded offerings include DAVID Microliving for micro-apartments, Smart Balkon for smart balcony solutions, and Mitarbeiterwohnen for employee housing. The Holzsystembau (wood system construction) division delivers prefabricated timber buildings for multi-story residential, commercial, healthcare, educational, and hotel applications. Material operations include Steinbruch Hohenems quarry, recycling and disposal services, and asphalt/concrete products.

Differentiator

Problem solved

Functional benefit

Brands

• Rhomberg Energie: Energy solutions including photovoltaic systems, energy management, and charging solutions for buildings
• DAVID Microliving
• Smart Balkon
• WoodRocks
• DAVID

Products and services

• General & Total Contracting (General- & Totalunternehmer) General contractor and total contractor services managing complete construction projects from planning to turnkey handover, for residential, commercial, and public sector clients.
• Building Construction (Hochbau & Tiefbau) Structural engineering and civil engineering construction services for residential, commercial, industrial, and infrastructure projects.
• Timber System Construction (Holzsystembau) Prefabricated timber construction for multi-story residential, commercial, healthcare, educational, and hotel buildings, including densification, upward extension, and serial thermal renovation.
• Renovation and Modernization (Umbau und Sanierung) Building renovation and modernization services, including residential complex renovation with fixed price guarantees, covering 150+ completed projects in Vorarlberg over 15+ years.
• Real Estate and Site Development (Immobilien- und Standortentwicklung) Real estate development including site search, property valuation, residential and commercial project development, construction and project management, financing and marketing support.
• Rhomberg Energie (Energy Solutions) Energy division offering 360-degree energy concepts, rooftop and facade-integrated photovoltaics, EV charging solutions, PV carports, and energy and load management systems for buildings.
• Property Consulting and Management (Immobilienberatung & -management) Property consulting, management, and administration services for property owners and investors.
• Raw Materials, Building Materials and Recycling Operation of Steinbruch Hohenems quarry, production of concrete and asphalt products, demolition and recycling services for construction materials.
• DAVID Microliving Micro-living apartments and compact housing solutions brand targeting students and young professionals.
• Smart Balkon Smart balcony solutions with integrated technology for modern urban living.
• Mitarbeiterwohnen (Employee Housing) Employee housing solutions providing fully furnished accommodation for workforce, including seasonal staff housing for tourism and hospitality clients.
• Integrated Planning (Integrale Planung) Integrated planning services combining architectural, structural, and technical design disciplines for coordinated building project delivery.

Quantifiable outcome

• Heating energy demand reduced by approximately 85% (from 231 kWh/m²a to 35 kWh/m²a) and CO₂ emissions reduced by approximately 94% (from 118 kg/m²a to 7 kg/m²a) through comprehensive renovation
• +3 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators3 records

Recent moves5 records

Expansion highlights6 records

Broad incumbents

• Strabag SE: One of Europe's largest construction groups with deep Austrian roots, offering building, civil, and infrastructure construction across many countries. A broader incumbent that overlaps with Rhomberg's general contracting, civil engineering (Tiefbau), and timber system exposure via subsidiary Züblin.
• Ed. Züblin AG: German general contractor and Strabag subsidiary with a strong building construction and civil engineering portfolio. Comparable as a large DACH-based general contractor and total contractor serving commercial and residential clients.

Regional players

• Implenia AG: Swiss-headquartered construction and real estate services provider active in buildings, civil engineering, and tunnels across Switzerland and Germany. Comparable as a full-service builder with sustainability focus, particularly relevant given Rhomberg's growing Swiss business (Rhomberg Bau AG, YOND Campus).
• Marti AG Bern: Swiss general contractor covering building construction, civil engineering, and renovation with strong Zurich presence. Comparable to Rhomberg Bau AG as a Swiss-market general contractor pursuing similar commercial and residential mandates.
• Leyrer + Graf Baugesellschaft m.b.H. Austrian family-owned general contractor headquartered in Lower Austria, with full-service construction capabilities across building, civil, and renovation segments. Comparable to Rhomberg Bau in ownership structure, service breadth, and DACH regional exposure.

Direct peers

• Swietelsky Baugesellschaft m.b.H. Austrian private general contractor with comparable service mix covering building construction, renovation, infrastructure, and raw materials. Closely matches Rhomberg Bau in scale, ownership profile (privately held), and DACH regional footprint.
• Porr AG: Austrian-headquartered full-service general contractor offering building construction, civil engineering, and infrastructure across DACH and CEE markets. Directly comparable to Rhomberg Bau as a general and total contractor serving public and private clients in the same region.

Emerging players

• Hasslacher Norica Timber: Austrian sawmill and engineered timber products manufacturer serving construction applications including structural timber, glulam, and cross-laminated timber. Adjacent comparable in timber value chain underpinning Rhomberg's Holzsystembau methodology.
• Rubner Holzbau AG: South Tyrolean timber construction specialist delivering engineered wood buildings across Europe. Comparable to Rhomberg's Holzsystembau offering in multi-story timber construction methodology and Alpine market presence.
• Kaufmann Bausysteme GmbH: Austrian timber construction specialist focused on prefabricated mass timber building systems. Directly comparable to Rhomberg's Holzsystembau division in technology and target market, though smaller in scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/user/Rhomberg09

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries4 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 Rhomberg Bau GmbH