Büro für Erneuerbare Energie

What Büro für Erneuerbare Energie does

Büro für Erneuerbare Energie (legal entity Ing. Leo Riebenbauer GmbH) is an Austrian private engineering consultancy founded in 1994 by Leo Riebenbauer and headquartered in Pinggau, Styria, with a secondary office in Oberwart, Burgenland. The firm specializes in planning, design, permitting, construction supervision, and commissioning of renewable energy systems, with a primary focus on biomass district heating, combined heat and power (CHP) from wood gasification, biogas installations, geothermal systems, solar thermal, and photovoltaic infrastructure. It also delivers building services engineering (HKLS) for residential, commercial, healthcare, and tourism facilities. Over 30+ years, the firm has completed more than 100 renewable energy projects across Austria, with selected international engagements in France (Strasbourg-Meinau pellets heating plant), Germany, and Hungary.

The firm's revenue model is professional-services-based, generating fees from feasibility studies, detailed engineering, permitting, grant administration (Förderungsabwicklung), construction supervision, and commissioning support, priced on a project-by-project quotation basis. Go-to-market is sales-led and relationship-driven: projects are won through competitive public-sector tenders with municipalities and Stadtwerke, and direct negotiation with private utilities, tourism operators, and industrial clients. Named customers include Energie Steiermark, EVN, Energie Burgenland, Stadtwerke Fürstenfeld, Stadtgemeinde Klosterneuburg, and Retter Bio-Natur Resort, with notable reference installations including Austria's largest wood gasification plant (Fürstenfeld), an €18M Deutschlandsberg biomass heating plant, and the Strasbourg-Meinau facility that won the Marianne d'Or prize.

The firm is founder- and family-owned, with Leo Riebenbauer and his son Josef Riebenbauer serving as Geschäftsführer; no external funding, parent company, or institutional shareholders are disclosed. It markets itself as "Energiearchitekten" (energy architects) and differentiates through deep specialization in Austrian and EU regulatory and funding frameworks, full-lifecycle delivery, and hybrid system integration (e.g., biomass combined with solar thermal, power-to-heat from excess wind, industrial waste heat recovery). Recent strategic activity includes a 2026 relocation to a new purpose-built Pinggau headquarters, a GEO.MAT research consortium partnership targeting thermal-bath decarbonization, and ongoing multi-million Euro biomass and district heating commissions.

Name

Büro für Erneuerbare Energie

Legal name

Ing. Leo Riebenbauer GmbH

Website

https://riebenbauer.at

Company type

Private

Founded year

1994

Operating status

Operating

Headcount range

11–50 employees

Short description

Austrian private engineering consultancy (Büro für Erneuerbare Energie, legal entity Ing. Leo Riebenbauer GmbH) specializing in renewable energy planning — biomass district heating, wood gasification CHP, biogas, geothermal, solar thermal, and photovoltaic systems. Founded 1994, the firm serves municipalities, utilities, tourism operators, and industrial clients primarily across Austria with select international projects.

Ownership category

akta.pro rank

Product category

Renewable Energy Engineering Services

NAICS

Architectural, Engineering, and Related Services (5413)

akta.pro primary industry

Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ)

akta.pro secondary industry

Site Preparation & Civil Works (Clearing, Grading, Earthworks, Roads) (EUAMAFAA)

Keywords

• Renewable energy planning
• Biomass heating systems
• District heating engineering
• Wood gasification CHP
• Building services engineering

Headquarters

HQ city

Pinggau

HQ country

Austria

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales

Revenue model

1. Engineering and Planning Services: The company generates revenue through comprehensive engineering consulting services including feasibility studies, planning, permit applications, construction supervision, and commissioning support for renewable energy projects. Revenue is project-based and typically one-time per engagement, with some ongoing monitoring and optimization contracts.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

Büro für Erneuerbare Energie is an Austrian engineering consultancy that plans, designs, and supervises renewable energy projects. Core services cover biomass district heating networks, combined heat and power (CHP) wood gasification and biogas plants, geothermal systems, solar thermal installations, photovoltaic systems, and building services engineering (HKLS) for residential, commercial, and public buildings. The firm accompanies clients from feasibility studies through permitting, construction supervision, commissioning, and grant funding administration.

Product overview

Büro für Erneuerbare Energie (Riebenbauer) is an engineering consultancy firm offering comprehensive planning services for renewable energy systems. The company does not offer a single unified product but rather a portfolio of interconnected engineering services spanning biomass district heating (NW Biomasse-Nah-/Fernwärme), CHP wood gas and biogas systems (KWK-Holzgas & Biogas), building services engineering (HKLS-Gebäudetechnik), geothermal solutions (GTH-Geothermie), solar thermal systems (THS-Thermische Solaranlagen), and photovoltaic installations (PV-Photovoltaik). These services are typically offered in combination as integrated energy solutions, supported by energy consulting and grant application support (Förderungsabwicklung). The firm accompanies clients from initial feasibility studies through planning, permitting, construction supervision, and system optimization.

Differentiator

Problem solved

Functional benefit

Products and services

• NW Biomasse-Nah-/Fernwärme (Biomass District Heating Planning) Planning, design, and project management for biomass district heating and remote heating networks, including boiler systems, buffer storage, and pipe network infrastructure for municipalities, utilities, and large building complexes.
• KWK-Holzgas & Biogas (Wood Gasification and Biogas CHP) Combined heat and power (CHP) system planning using wood gasification and biogas technologies, covering biomass gasification plants and biogas facilities that produce electricity, heat, and byproducts such as biochar or biomethane.
• HKLS-Gebäudetechnik (Building Services Engineering) Building services engineering (heating, ventilation, air conditioning, and sanitary systems) for residential, commercial, tourism, and public buildings, including new construction, renovation, and energy efficiency optimization.
• GTH-Geothermie (Geothermal Systems) Geothermal energy system planning including ground-source heat pumps, borehole heat exchangers, and geothermal heating and cooling solutions for buildings and district networks.
• THS-Thermische Solaranlagen (Solar Thermal Systems) Solar thermal system planning for hot water production and space heating support using solar collectors, including integration with biomass heating systems and large-scale rooftop collectors on heating plants.
• PV-Photovoltaik (Photovoltaic Systems) Photovoltaic system planning including roof-mounted and ground-mounted solar installations, citizen participation models, and solar carport systems for municipalities, utilities, and businesses.
• Energieplanung & Beratung (Energy Consulting) Comprehensive energy consulting from feasibility studies through planning, permitting, construction supervision, commissioning, and ongoing optimization of renewable energy systems.

Quantifiable outcome

• Projects completed: 100+ renewable energy installations
• +3 more outcomes

Named customers13 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• AEE INTECcoreStrategic or Co-development Partner · 3 March 2026Research partnership in GEO.MAT project investigating geothermal utilization for thermal bath decarbonization. Büro für Erneuerbare Energie serves as practice partner in this research initiative.
• BEST - Bioenergy and Sustainable Technologies GmbHcoreStrategic or Co-development Partner · 3 March 2026Research partner in GEO.MAT project focused on decarbonization solutions for thermal baths using geothermal heat and cascade heat pump systems.
• Forschung BurgenlandcoreStrategic or Co-development Partner · 3 March 2026Research partner in GEO.MAT project bringing academic research capabilities to the thermal bath decarbonization initiative.
• Green Energy LabcoreStrategic or Co-development Partner · 3 March 2026Research partner in GEO.MAT project, contributing to the sustainable energy research ecosystem.
• STEPSAHEAD Energiesysteme GmbHcoreStrategic or Co-development Partner · 3 March 2026Partner in GEO.MAT project providing energy systems expertise for thermal bath decarbonization.
• Sonnentherme LutzmannsburgcoreStrategic or Co-development Partner · 3 March 2026Demonstration site for GEO.MAT project - one of two thermal bath facilities where decarbonization concepts are being implemented.
• H2O-Hotel-Therme Bad WaltersdorfcoreStrategic or Co-development Partner · 3 March 2026Demonstration site for GEO.MAT project - second thermal bath facility implementing geothermal and heat pump solutions for decarbonization.
• Reduce GesundheitsressortminorStrategic or Co-development Partner · 3 March 2026Partner in GEO.MAT project representing the health resort sector in sustainable thermal energy solutions.
• Studio 31minorOthersGraphic design partner for company communications and the Renewable Energy Magazine publication.
• Bernhard Bergmann PhotographyminorOthersProfessional photographer documenting company projects and team for marketing materials.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• COWI: International engineering consultancy with renewable energy practice including biomass and district heating planning. Provides engineering services for energy infrastructure projects similar to Büro für Erneuerbare Energie but at global scale.
• AFRY: Leading European engineering consultancy (formerly ÅF Pöyry) with strong bioenergy and district heating practice. Plans biomass combustion, CHP, and district heating projects across the Nordics and DACH region, directly overlapping with Büro für Erneuerbare Energie's core offering.
• Ramboll: Global engineering consultancy with substantial renewable energy and district heating practice in Europe. Provides planning, feasibility, and engineering services for biomass and energy infrastructure — same client base (municipalities, utilities) and same service scope, but at vastly greater scale and geographic reach.
• Drees & Sommer: German engineering firm specializing in sustainable building, energy infrastructure, and decarbonization consulting. Comparable in offering engineering planning for energy-efficient buildings and renewable heating systems, particularly in DACH region.
• Sweco: European engineering consultancy with renewable energy and sustainability services including district heating planning. Comparable in delivering engineering and consulting for municipal energy transition projects, though with much broader portfolio and geographic reach.

Direct peers

• Öko-Institut: German research and consulting institute working on energy transition, renewable energy systems, and climate policy. Provides consulting and analysis to municipalities and utilities on renewable heating and decarbonization — comparable client base and analytical/consulting profile.
• AEE INTEC: Austrian research institute specializing in solar thermal, biomass, and energy efficiency technologies — directly comparable to Büro für Erneuerbare Energie in technology focus and Austrian market. Active partner in the firm's GEO.MAT research project and operates overlapping competencies in renewable heating systems.

Others

• Fraunhofer IEE: German applied research institute for energy economics and energy technology transformation. Comparable technology domain (renewable energy, energy transition) but primarily research-focused rather than commercial engineering planning — comparable to AEE INTEC in role rather than to Büro für Erneuerbare Energie's commercial work.
• TÜV SÜD: Global testing, inspection, and certification company with renewable energy services including biomass plant certification and energy audits. Adjacent to Büro für Erneuerbare Energie's domain but focused on certification rather than engineering planning.
• BEST - Bioenergy and Sustainable Technologies GmbH: Austrian bioenergy research center and GEO.MAT consortium partner with Büro für Erneuerbare Energie. Operates in overlapping technology areas (biomass gasification, bioenergy) but primarily as a research institution rather than commercial engineering consultancy.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xinstagram.com/buero.riebenbauer
• Facebookfacebook.com/buero.riebenbauer
• LinkedInlinkedin.com/company/buero-riebenbauer

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Büro für Erneuerbare Energie