What EGS-plan does

EGS-plan, legally Ingenieurgesellschaft für Energie-, Gebäude- und Solartechnik mbH, is a privately held German engineering consultancy headquartered in Stuttgart with a secondary branch opened in Radolfzell am Bodensee in 2025. Founded around 1998 and operating for over 25 years with approximately 100 employees, the firm delivers integrated sustainable-building engineering services across all HOAI planning phases 1–9. Its portfolio spans building physics (thermal, acoustic, hygrothermal, daylight), holistic energy concepts with building and district simulation, technical building equipment planning as a TGA-Generalplaner (HLSK, electrical engineering, MSR building automation), technical monitoring and operational optimization of building performance, and consulting for sustainability certifications including DGNB, BNB, QNG, NaWoh, Passivhaus, EU-Taxonomy, and N!BBW. Notable proprietary tools include KliBERT, an Excel-based greenhouse gas emissions calculation tool for municipal land-use planning developed on behalf of the City of Freiburg. The firm maintains a strategic research linkage with the Steinbeis Innovation Center siz energieplus and participates in IBA'27 Stuttgart with 8 projects.

The company generates revenue exclusively through project-based professional services engagements, with fees negotiated per project under HOAI fee structures and additional contracting/managed-service revenue from selected large-scale energy supply and district heating network projects (e.g., Center Parcs Allgäu, Stadtwerke Hechingen). Its go-to-market is enterprise field sales: direct client engagement with property developers, municipalities, county governments, hospitals, universities, and industrial clients across the DACH region, supplemented by public tenders and referrals. Customer concentration is moderately diversified across municipal/government work (Landtag Baden-Württemberg, Stadt Esslingen, Landkreis Konstanz, Stadtwerke), industrial clients (STIHL, MANN+HUMMEL, elobau, Badische Staatsbrauerei Rothaus), commercial real estate (UmweltBank, USWM-Immobilien, IHK Region Stuttgart), healthcare and research (Klinikum Esslingen, Universität Konstanz, Universität Ulm, Julius-Kühn-Institut), and cultural infrastructure (Nationaltheater Mannheim, ~€330M total project volume).

Underlying delivery is built on BIM-supported planning, building and district simulation, MSR/building automation, and a continuous technical monitoring practice that has produced documented outcomes such as 22% energy reduction at Landtag Baden-Württemberg, ~1,000 MWh/year savings at Klinikum Esslingen, and over €100,000/year cost savings for that client. The firm is a founding member of DGNB, holds DGNB Auditor and Energieeffizienz-Experte credentials, and has accompanied more than 80 successful DGNB certifications across its project base of 1,000+. Recent strategic activity (Bodensee branch in 2025, four-person Geschäftsführung expansion in January 2026 with Tobias Nusser, KliBERT launch in May 2026, IBA'27 participation) signals ongoing scaling of geographic, product, and organizational surface area on top of the established consultancy base.

Name

EGS-plan

Legal name

Ingenieurgesellschaft für Energie-, Gebäude- und Solartechnik mbH

Website

https://egs-plan.de

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

51–100 employees

Short description

EGS-plan is a Stuttgart-based German engineering consultancy providing integrated sustainable-building services — building physics, energy concepts, TGA-HLSK, electrical engineering, sustainability certification (DGNB/QNG/BNB/NaWoh), and technical monitoring — to municipalities, property developers, industrial clients, and public institutions across the DACH region.

Ownership category

akta.pro rank

Product category

Sustainable Building Engineering Services

NAICS

Engineering Services (54133), Environmental Consulting Services (541620), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Sustainability, ESG & Climate Risk Advisory (BPAHAJAH)

akta.pro secondary industries

Sustainability & ESG Consulting (BPAHACAK), ESG Strategy & Materiality Assessment (EUAHAJAA), ESG Data Platforms, Controls & Audit Readiness (Data quality, internal controls) (EUAHAJAN)

Keywords

• Sustainable building engineering
• Building physics consulting
• Energy concept planning
• HVAC engineering services
• Solar energy systems

Headquarters

HQ city

Stuttgart

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: Fee-based engineering consulting services for building physics, energy concepts, TGA-HLSK, and electrical engineering across HOAI phases 1–9. Revenue is project-based, typically billed as professional services for property developers, municipalities, and public institutions.
2. Technical Monitoring: Technical monitoring services (Technisches Monitoring) for building energy performance optimization during operation, including data analysis and building management optimization.
3. Sustainability Certification Consulting: Consulting and accompaniment services for building sustainability certifications (DGNB, BNB, QNG, NaWoh, EU-Taxonomy), providing assessment, documentation, and audit support.
4. Contracting Services: Contracting and district heating network planning services, including development of energy supply concepts, contracting tendering, and ongoing energy management for large-scale projects.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

EGS-plan is an engineering consultancy (Ingenieurgesellschaft) that designs, plans, and monitors sustainable buildings and energy systems across HOAI phases 1–9. It provides integrated services in building physics, energy concept development, technical building equipment (HLSK = Heizung, Lüftung, Sanitär, Klima — heating, ventilation, sanitary, air conditioning), and electrical engineering, along with technical monitoring and sustainability certification support (DGNB, QNG, BNB, NaWoh, EU Taxonomy). Clients are predominantly property developers, municipalities, public institutions, and industrial enterprises across the DACH region.

Product overview

EGS-plan is an engineering services company offering integrated planning services for sustainable building and renewable energy. The portfolio spans building physics, energy concepts, building services (HLSK and electrical engineering), building performance optimization, and sustainability certifications. The company also developed KliBERT, an Excel-based climate impact calculation tool for urban planning. Services are delivered through specialized departments including Bauphysik, Energiekonzeption, Energy Services, Gebäude Performance, TGA-HLSK, and Elektrotechnik, with a focus on DGNB-certified sustainable building and BIM planning methodologies.

Differentiator

Problem solved

Functional benefit

Products and services

• Bauphysik (Building Physics) Building physics services covering thermal protection, acoustic design, hygrothermal analysis, daylight planning, and consulting on sustainability certifications (DGNB, QNG, Passivhaus, NaWoh, BNB), targeting property developers, municipalities, and industrial clients.
• Energiekonzepte (Energy Concepts) Holistic energy concept development for buildings and districts, including building energy simulation, daylight and airflow simulation, energy generation and storage simulation (PV, solar thermal), district simulations, and primary-energy evaluation of district heating systems.
• Energy Services Comprehensive energy-sector services covering energy provision, emissions, efficiency, climate neutrality, funding/regulatory navigation, and technical considerations for energy-transition and heat-transition (Wärmewende) planning.
• Building Performance (Technisches Monitoring / Optimization) Comprehensive services to improve building efficiency and guide buildings through early lifecycle phases into optimal operation, including technical monitoring (Technisches Monitoring) and building-management optimization.
• TGA-HLSK General Planning (Technical Building Equipment) General planning for heating, cooling, ventilation, and sanitary technology (HLSK), including MSR building automation, quality management, object monitoring, BIM planning, and hydrogen production planning.
• Elektrotechnik (Electrical Engineering) Electrical engineering services covering power systems, photovoltaic systems, battery storage, EV charging infrastructure, telecommunications, and building electrical systems from design through commissioning.
• KliBERT Excel-based emissions-calculation software tool for approximate greenhouse-gas emissions estimation in municipal development planning (Bauleitplanung), supporting municipalities and planning participants in considering climate impacts early in the planning process.
• Sustainability Certification Consulting (DGNB, BNB, QNG, NaWoh, EU-Taxonomy) Consulting and accompaniment services for building sustainability certifications (DGNB, BNB, QNG, NaWoh, EU-Taxonomy) including assessment, documentation, and audit support; EGS-plan is a DGNB founding member with over 80 successfully accompanied DGNB certifications.
• BIM-Planung (Building Information Modeling) BIM services using intelligent 3D models to coordinate planning, execution, and operation, minimizing collisions and ensuring transparent cost and schedule control across HOAI phases.
• Contracting (Energy Supply Contracting / District Heating) Energy supply contracting services including development of supply concepts, tendering, and project management for district heating networks and on-site energy supply.

Quantifiable outcome

• 22% reduction in annual final energy consumption at Landtag Baden-Württemberg after technical monitoring
• +6 more outcomes

Named customers20 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

Feature1 record

Partnerships

Three partnerships are on record, tiered core.

• siz energieplus (Steinbeis-Innovationszentrum energieplus)coreStrategic or Co-development PartnerEGS-plan maintains a unique institutional partnership with the Steinbeis Innovation Center siz energieplus, enabling intensive knowledge transfer between research and practice. This partnership covers all EGS-plan competencies and specialist groups: Energy Design, Building Physics, Building Technology, Regenerative Energy Supply, and Operational Optimization. The research linkage allows EGS-plan to drive innovation and transfer findings rapidly into practice, contributing to climate protection and the energy transition across Europe.
• Umweltschutzamt der Stadt FreiburgcoreStrategic or Co-development PartnerKliBERT was developed by EGS-plan on behalf of the Environmental Office of the City of Freiburg. This partnership produced a standardized greenhouse gas emissions calculation tool for municipal land-use planning, fulfilling §13 KSG (Bund) requirements.
• Landkreis KonstanzcoreImplementation/ SI/ Consulting PartnerEGS-plan was commissioned by Landkreis Konstanz to provide comprehensive planning and quality assurance for the new breathing apparatus training facility in Rielasingen-Worblingen, including building physics, DGNB Silver/QNG certification support, Blower-Door tests, and pollutant measurements.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Ingenieurbüro Hausladen: Munich-based engineering office focused on energy concepts, building physics, and sustainable building design for developers and municipalities. Similar size (~50–80 staff), DGNB involvement, and project-based fee model make it a close competitor for DACH sustainable-building mandates.
• Transsolar Energietechnik: Munich-based engineering consultancy specializing in building physics, energy concepts, and climate-responsive design. Highly comparable in service offering, customer base (developers, municipalities, public institutions), and technical depth across building simulation and HVAC planning.
• Werner Sobek Group: Stuttgart-based engineering firm covering structural, façade, and sustainability engineering for buildings. Comparable in geography, premium-client profile, and integration of research into practice; competes for sustainability-oriented developer mandates.
• Knippers Helbig Advanced Engineering: Stuttgart-based engineering firm specializing in complex, sustainable building and infrastructure projects. Comparable in size, premium client base, and integration of research-driven approaches for developer and public-sector clients.
• Bollinger + Grohmann: Frankfurt-based engineering consultancy with strong sustainability, energy, and building-physics practice alongside structural engineering. Comparable in interdisciplinary engineering services for high-performance sustainable buildings across DACH.
• EnergyPRO: German engineering firm focused on energy concepts, building simulation, and efficiency consulting. Comparable services and customer segments, though typically serving smaller commercial and residential developers.
• Ernst Basler + Partner: Swiss-German consulting firm with strong sustainability, energy, and climate-risk advisory practice serving public and real estate clients. Comparable in ESG strategy and climate advisory, with similar municipal and developer mandates.

Broad incumbents

• Drees & Sommer: Stuttgart-headquartered, ~5,000-employee engineering consultancy with deep sustainability, ESG, and digital building capabilities. Overlaps with EGS-plan across energy concepts, BIM, and certification work, but at significantly larger scale and broader geographic footprint.
• Ramboll: Global engineering, sustainability, and consulting firm with significant DACH presence. Overlaps in energy concepts, decarbonization, and ESG advisory but operates at much larger scale with broader sector coverage.
• Arcadis: Global design and consultancy firm with strong sustainability, climate, and buildings practices in Europe. Overlaps with EGS-plan across ESG building advisory and sustainability certification, but at much larger international scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/egsbangkok
• LinkedInlinkedin.com/company/egs-plan-gmbh

Compliance11 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 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 EGS-plan