IST EnergiePlan

What IST EnergiePlan does

IST EnergiePlan GmbH is a privately held German engineering consultancy specializing in technical building equipment planning (HLSK — heating, ventilation, sanitation, climate) and construction management for new builds and renovations. Founded in 1998 by four engineers and tracing its lineage to a 1976 solar-technology engineering office, the firm operates from four locations in southern Germany — Müllheim (headquarters), Augsburg, Schwarzenbach/Saale, and Nördlingen — with a team of 40-50 planners. Its core services span preliminary studies, detailed planning, and on-site construction supervision across heating, ventilation, sanitary, electrical, telecommunications, building automation, elevator, refrigeration, and gas/water/wastewater systems.

The company pursues a narrow vertical specialization strategy with particular depth in swimming pool engineering (since 1988, starting with the Engen/Hegau outdoor pool) and in solar/renewable integration (photovoltaic, solar thermal, heat pumps, district heating, BHKW combined heat and power). It carries DIN ISO 9001:2015, DIN ISO 14675 (fire alarm system planning), and VDI 6023 (drinking water hazard analyses) certifications, and a managing director has sat on the VDI 2089 guideline committee since 2001, signaling regulatory influence in the pool-planning standards.

IST EnergiePlan generates revenue through project-based, fixed-fee engineering consulting contracts priced under the German HOAI fee schedule for architects and engineers. Customer concentration is heavily skewed toward the German public sector — municipalities, federal agencies (Bundesanstalt für Immobilienaufgaben), municipal utilities, and public building authorities — supplemented by private residential developers and healthcare operators. Acquisition runs through competitive bidding on public tenders, referrals from architectural partners, and repeat engagements, with no disclosed external funding or M&A activity.

Name

IST EnergiePlan

Legal name

IST EnergiePlan GmbH

Website

https://ist-energieplan.de

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

11–50 employees

Short description

IST EnergiePlan is a privately held German engineering consultancy that plans and supervises technical building equipment (HLSK) for municipalities, public institutions, and private developers across four offices in southern Germany.

Ownership category

akta.pro rank

Product category

Building Services Engineering

NAICS

Architectural, Engineering, and Related Services (5413)

SIC

Auto Controls For Regulating Residential & Comml Environments (3822)

akta.pro primary industry

HVAC Controls & Optimization (Smart Thermostats, VAV, Chillers/Boilers Controls) (BPABAGAB)

akta.pro secondary industries

Energy Services (Retrofits/Commissioning/Testing & Balancing) (IMAIABAI), HVAC Service, Maintenance & Repair (BPABACAA)

Keywords

• Building services engineering
• HLSK planning
• Technical building equipment
• Energy consulting
• Construction supervision

Headquarters

HQ city

Müllheim

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting & Planning Services: Project-based engineering consulting and planning services for building technical equipment (HLSK systems), including preliminary studies, detailed planning, and construction supervision. Revenue is generated through fixed-fee project contracts, typically based on German HOAI (Honorarordnung für Architekten und Ingenieure) fee structures.
2. Technical Building Equipment Planning: Complete planning services for all building technical systems including heating, ventilation, sanitation, electrical, and building automation for new construction and renovation projects.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

IST EnergiePlan is a German engineering consultancy that plans and supervises technical building equipment (HLSK – heating, ventilation, sanitation, and air conditioning) for new construction and renovation projects. Services span preliminary studies, detailed planning, and construction supervision across electrical engineering, building automation, sanitary, heating, ventilation, refrigeration, elevator, telecommunications, and gas/water/wastewater systems, with particular specialization in energy-efficient and sustainable solutions such as solar thermal, photovoltaic, heat pumps, district heating, and swimming pool engineering.

Product overview

IST EnergiePlan is an engineering consulting company offering comprehensive planning and construction management services for building technical equipment (HLSK - Heizung, Lüftung, Sanitär, Klimatechnik). The company operates from four locations (Müllheim, Augsburg, Schwarzenbach/Saale, Nördlingen) and provides services across nine core areas: Fernmelde & Informationstechnische Anlagen, Consulting, Gebäudeautomation, Nutzungsspezifische Anlagen, Aufzugsanlagen, Starkstromanlagen, Luft- & Kältetechnische Anlagen, Abwasser/Wasser/Gasanlagen, and Wärmeversorgungsanlagen. With over 25 years of experience, they specialize in sustainable and energy-efficient solutions for public and private construction projects.

Differentiator

Problem solved

Functional benefit

Products and services

• HLSK Planning & Construction Supervision (Planung & Bauleitung)

Quantifiable outcome

• 50+ years of solar technology experience
• +1 more outcomes

Named customers7 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

Feature3 records

Partnerships

One partnership is on record.

• Duale Hochschule Baden-WürttembergminorOthersPartner university providing dual study programs. IST EnergiePlan serves as a partner company (Partnerbetrieb) offering study positions for students who work on real projects from day one.

Scale indicators3 records

Recent moves10 records

Expansion highlights5 records

Direct peers

• ZWP Ingenieur-AG: German MEP/HLSK engineering consultancy headquartered in Cologne with multiple regional offices, offering technical building equipment planning across heating, ventilation, sanitation, electrical, and building automation — directly comparable service mix, client base, and project profile to IST EnergiePlan.
• Ebert-Ingenieure: Munich-based engineering consultancy focused on technical building equipment and MEP planning for public and private clients in southern Germany, with similar project types (schools, public buildings, energy-efficient renovations) and HOAI-aligned fee model.
• Ingenieurgruppe Bauen: Mannheim-based MEP/HLSK engineering consultancy serving southern German public-sector clients with comparable planning services, similar size band, and analogous expertise in energy-efficient technical building equipment — a close substitute for IST EnergiePlan in Baden-Württemberg.

Broad incumbents

• Drees & Sommer: Stuttgart-headquartered engineering and consulting firm with deep expertise in building services engineering, energy efficiency, and sustainable construction; substantially larger than IST EnergiePlan but competes for the same public- and private-sector MEP/HLSK planning mandates in southern Germany.
• Sweco Deutschland: European engineering consultancy with German operations focused on sustainable building design, energy consulting, and technical building equipment planning; addresses the same client needs as IST EnergiePlan at substantially larger scale.
• HPP Architekten: German architecture and engineering firm with integrated building-services planning capabilities; competes for technical planning scopes on public-sector and institutional projects where IST EnergiePlan operates, though typically bundled with architectural services.
• WSP in Deutschland: Global engineering consultancy with a significant German building-services practice (formerly WSP / formerly Ingenieurgemeinschaft für Gebäude); competes for large-scale public infrastructure planning mandates that IST EnergiePlan typically cannot bid on due to scale.
• Ramboll Deutschland: European engineering consultancy with German offices providing building services engineering and energy consulting for public and institutional clients; addresses an overlapping client set but at a scale and geographic breadth beyond IST EnergiePlan's current footprint.
• TÜV SÜD Industrie Service: Large German technical-services firm providing testing, certification, and engineering advisory including building-services and HVAC-related consulting; competes for adjacent regulatory, commissioning, and energy-services scopes relevant to IST EnergiePlan.

Others

• Schneider Electric (Building Automation): Global building-automation and energy-management vendor whose products (smart thermostats, VAV controls, chiller/boiler controls) are specified by IST EnergiePlan in its building-automation planning work — relevant as an ecosystem participant and indirect technology provider rather than a direct competitor.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/istenergieplan
• LinkedInlinkedin.com/company/istenergieplan
• Instagraminstagram.com/ist_energieplan

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 IST EnergiePlan