STB Bauphysik GmbH

What STB Bauphysik GmbH does

STB Bauphysik GmbH is a Bremen-based engineering consultancy specializing in building physics, established on October 1, 2021 as a spin-off from STB Ingenieure, a 75-year-old engineering firm. The firm provides services across four core technical disciplines: thermal building physics (heat, moisture, energy efficiency), building acoustics and room acoustics, immission protection (noise, vibration, pollutants), and sustainability certification consulting.

The company's service portfolio encompasses energy balance and life-cycle assessments, hygrothermal simulations (notably using the Fraunhofer IBP WUFI toolchain), sound insulation calculations, sustainability certification under DGNB, BNB, BiRN, and QNG schemes, Passivhaus component certification, and consulting for KfW and BAFA funding programs as well as GEG compliance. Its client base spans public sector clients (schools, universities, municipalities), enterprise real estate developers, healthcare facilities, manufacturing, and hospitality, with named engagements including projects for Bertelsmann and the Zech Group.

The business operates on a professional services model with fees structured per the HOAI (Honorarordnung für Architekten und Ingenieure) fee schedule, the regulated pricing framework for engineering services in Germany. The company is bootstrapped, with no external funding rounds, and operates from Bremen (headquarters) and Potsdam. Olaf Bosenius serves as Managing Director and Antje Bergmann as Prokuristin.

Name

STB Bauphysik GmbH

Legal name

STB Bauphysik GmbH

Website

https://stb-bauphysik.de

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

1–10 employees

Short description

STB Bauphysik GmbH is a Bremen-based engineering consultancy specializing in building physics, covering thermal physics, acoustics, immission protection, and sustainability certification for public and enterprise clients across Germany.

Ownership category

akta.pro rank

Product category

Building Physics Engineering Services

NAICS

Architectural Services (541310), Building Inspection Services (54135)

akta.pro primary industry

Sustainable/Green Building & LEED Consulting (BPAHAKAG)

akta.pro secondary industry

Insulation & Air/Vapor Barrier Systems (Thermal, Acoustic, WRB/AVB) (IMAFAMAD)

Keywords

• Building physics consulting
• Thermal insulation engineering
• Acoustic engineering services
• Sustainability certification consulting
• Energy efficiency verification

Headquarters

HQ city

Bremen

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

Revenue model

1. Professional Engineering Services: Project-based engineering consulting fees for building physics services including thermal protection, acoustics, immission protection, sustainability planning, and certification consulting. Revenue generated through hourly fees per HOAI (Honorarordnung für Architekten und Ingenieure) and testing fees per state implementation regulations (DVO).

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

STB Bauphysik GmbH is a building physics engineering consultancy providing expert services across thermal building physics (heat protection, thermal bridging, summer heat protection, hygrothermal simulation), building and room acoustics (sound insulation, airborne and impact sound, reverberation), immission protection (noise measurements and expert reports), sustainability certification (DGNB, BNB, BiRN, LCA/LCC), KfW/BEG funding consulting, and statutory GEG testing/inspection.

Product overview

STB Bauphysik GmbH is a building physics consulting firm offering integrated services across six core areas: Thermal Building Physics (wärmeschutz), Building & Room Acoustics (bau- & raumakustik), Immission Protection (immissionsschutz), Sustainability (nachhaltigkeit), Funding Consulting (förderung), and Testing & Inspection (prüfwesen). The company is organized as a unified service practice rather than a software platform — clients engage STB for expert consulting, calculations, certifications, and official inspections rather than purchasing standalone software products. The firm serves residential, commercial, industrial, and institutional building projects with both new construction and renovation expertise.

Differentiator

Problem solved

Functional benefit

Products and services

• Thermische Bauphysik (Thermal Building Physics) Building physics consulting covering heat protection certificates per GEG, efficiency building and passive house verification, thermal bridging calculations, summer heat protection analysis, thermal room simulation, and hygrothermal simulation. Targets developers, architects, and property owners of residential, commercial, and industrial buildings.
• Bau- & Raumakustik (Building & Room Acoustics) Acoustic consulting including sound insulation certification, airborne and impact sound protection, exterior noise protection, reverberation time calculation, room acoustic design, and construction acoustic measurements. Targets architectural and engineering firms and building developers.
• Immissionsschutz (Immission Protection) Noise protection services including rating level measurements, sound power level measurements, immission forecasts, noise reduction measures, and immission protection expert reports. Targets industrial and commercial facilities requiring noise compliance.
• Nachhaltigkeit (Sustainability Certification) Sustainability planning including lifecycle assessment (LCA), lifecycle cost calculation (LCC), feasibility analysis (Pre-Check), CO2 analysis, and certification consulting for DGNB, BNB, BiRN, BNK/BNG, and QNG standards. Targets projects pursuing sustainability certification.
• Förderung (Funding & Subsidy Consulting) Subsidy consulting for German building funding programs including KfW new construction (KFN), modernization subsidies (BEG), Klimaschutzsiedlung Bremen climate protection settlement, funding program accompaniment, and sustainability certification funding. Targets property owners, developers, and municipalities pursuing federal subsidies.
• Prüfwesen (Testing & Inspection) Official inspection services for legal thermal building certificates per GEG, construction-accompanying monitoring, compliance declarations, and expert certification for energy-efficient construction. Recognized as experts in federal states Bremen, Schleswig-Holstein, NRW, Berlin, and Brandenburg.

Quantifiable outcome

• CO2 savings of 660 to/year achieved for Zech Haus commercial building through biomethane CHP system
• +4 more outcomes

Named customers13 records

Segments5 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

13 partnerships are on record, tiered core and minor.

• STB IngenieurecoreOthersParent company and shareholder of STB Bauphysik GmbH. STB Ingenieure has over 75 years of history in engineering. STB Bauphysik was spun off as an independent company on October 1, 2021. Partner offices exist in Bremen (Sonneberger Straße 15) and Potsdam (Karl-Liebknecht-Straße 11).
• DGNB (Deutsche Gesellschaft für Nachhaltiges Bauen)coreStrategic or Co-development PartnerSTB Bauphysik team members hold DGNB-Auditor and DGNB-Consultant certifications. Company is a member of DGNB. Provides sustainability certification consulting services for building projects seeking DGNB certification.
• BNB (Bewertungssystem Nachhaltiger Gebäude)coreStrategic or Co-development PartnerSTB Bauphysik team members hold BNB-Koordinator certification. Provides sustainability certification consulting services for building projects seeking federal BNB certification.
• BiRN (Bau-Institut für Ressourceneffizientes und Nachhaltiges Bauen)coreStrategic or Co-development PartnerSTB Bauphysik team members hold BiRN-Auditor certification. Company is a member of BiRN. Provides residential building sustainability certification consulting.
• Ingenieurkammer BremencoreOthersProfessional engineering chamber membership. Managing Director Olaf Bosenius serves on the board of the Engineering Chamber Bremen.
• Ingenieurkammer-Bau NRWminorOthersProfessional engineering chamber membership for North Rhine-Westphalia region.
• Architekten- und Ingenieurkammer Schleswig-HolsteinminorOthersProfessional engineering chamber membership for Schleswig-Holstein region.
• Brandenburgische IngenieurkammerminorOthersProfessional engineering chamber membership for Brandenburg region where the Potsdam office is located.
• VBI (Verband Beratender Ingenieure)coreOthersProfessional association membership. Managing Director Olaf Bosenius serves as deputy chairman of the VBI state association (Landesverband Bremen).
• Passivhaus InstitutcoreOthersCompany holds Passivehouse Planner certification. Provides Passive House planning and certification services.
• dena (Deutsche Energie-Agentur)coreOthersCompany is listed as a dena partner, providing energy efficiency expert services for German energy agency programs.
• KfW / Bundesförderung für Effiziente Gebäude (BEG)coreOthersListed energy efficiency experts provide KfW and BEG funding support consulting for building projects, enabling clients to access federal building energy efficiency subsidies.
• WTA (Wissenschaftlich-Technische Arbeitsgemeinschaft für Bauwesen)minorOthersProfessional technical association membership in building science.

Scale indicators4 records

Recent moves1 record

Expansion highlights4 records

Broad incumbents

• Drees & Sommer: Drees & Sommer is a large German real-estate and infrastructure consultancy with a substantial building physics and sustainability practice, competing with STB on large commercial, public, and developer-led projects but operating at much greater scale and breadth.
• DEKRA: DEKRA is a major German/international testing, inspection, and certification organization. Its building-related inspection and certification services overlap with STB Bauphysik's GEG verification and energy-efficiency testing practice, though DEKRA operates across many sectors.
• TÜV SÜD: TÜV SÜD is a large German testing, inspection, and certification group that absorbed Müller-BBM; its building physics, real estate, and certification services overlap with STB Bauphysik's GEG and sustainability certification work but at national/international scale.

Others

• DGNB (Deutsche Gesellschaft für Nachhaltiges Bauen): DGNB is the German Sustainable Building Council that issues the DGNB certification system STB Bauphysik consults on. It is an enabling/standards body rather than a direct competitor, but a relevant peer ecosystem player governing STB's sustainability certification revenue stream.

Direct peers

• ITA Ingenieurgesellschaft für Technische Akustik: ITA is a German engineering consultancy specializing in building and room acoustics as well as sound immission protection, directly comparable to STB Bauphysik's bau- & raumakustik and immissionsschutz service lines.
• Wölfel Engineering: Wölfel Engineering is a German engineering firm offering building physics, vibration, and acoustics consulting, with comparable HOAI-billed services and overlapping customer segments in real estate, industry, and public infrastructure.
• HPC AG: HPC AG is a German engineering consultancy with building physics, energy efficiency, and sustainability practices, serving developers, municipalities, and industrial clients — overlapping heavily with STB Bauphysik's segments.
• Kurz und Fischer: Kurz und Fischer is a German consulting office focused on building physics and building acoustics, with services (sound insulation certificates, thermal protection, room acoustics) directly parallel to STB Bauphysik's offering.
• Kötter Beratende Ingenieure: Kötter Beratende Ingenieure is a mid-sized German engineering consultancy covering building physics, structural engineering, and energy consulting — comparable in scope and target clients to STB Bauphysik.
• Müller-BBM Group: Müller-BBM is a long-standing German engineering consultancy specializing in building acoustics, building physics, and immission protection — directly comparable to STB Bauphysik's acoustics, thermal, and noise protection service lines.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/stb-bauphysik-gmbh

Compliance9 records

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 STB Bauphysik GmbH