Herrmann

What Herrmann does

Herrmann GmbH is a German damage management and restoration services company headquartered in Dortmund, founded in 2004 in Sprockhövel. The firm operates seven branch offices across North Rhine-Westphalia, Saarland, and Rhineland-Palatinate, with an additional presence in the Hamburg metropolitan area via Herrmann Nord GmbH, and employs roughly 130 staff as part of the Herrmann Unternehmensgruppe. Since 2023, the company has operated within the ARTUS Bautrocknung- und Sanierungsgruppe, a national network of nearly 2,000 restoration specialists; prior to ARTUS, it was part of the Hestia Unternehmensgruppe from November 2020.

The company's core offering is a fully integrated water, fire, and mold damage management service covering eight capabilities: leak detection (Leckortung) using gas detection, thermography, video endoscopy, and drain TV inspection; technical drying (Technische Trocknung) of building structures; restoration (Wiederherstellung) including painting, tiling, flooring, and carpentry; mold remediation (Schimmelsanierung) using HEPA filtration and dry ice blasting; special measurement procedures (Sondermessverfahren) for flat roofs and screed floors; blower door airtightness testing; building diagnostics (Bauwerksdiagnostik); and fire damage restoration (Brandschadensanierung). Methods are non-destructive and include proprietary procedures such as the test-gas approach (Prüfgasverfahren) for high-precision leak localization and electro-impulse flat roof leak detection. The 2025 merger with Aquaplan GmbH added specialized leak detection and firefighting water removal capabilities.

Herrmann generates revenue through project-based professional services, typically billed per engagement and frequently coordinated directly with insurance companies that cover the cost. The go-to-market is sales-led with a strong channel dimension: Herrmann is an authorized service provider for major German insurers including Allianz, AXA, ERGO, Generali, HUK-Coburg, Zurich, and Provincial, and maintains long-term partnerships with property managers such as Vonovia and Dogewo21. Direct customer intake occurs through a 24/7 emergency hotline and an online damage-reporting form. Customer segments are split across insurance companies (primary), property managers (primary), and private individuals (primary), with no public pricing disclosed. The managing directors are Sven Solmecke and Thorsten Cordes.

Name

Herrmann

Legal name

Herrmann GmbH

Website

https://herrmann-j.de

Company type

Private

Founded year

2004

Operating status

Operating

Short description

Herrmann GmbH is a German damage management firm providing water, fire, and mold restoration services to insurance companies, property managers, and private customers across North Rhine-Westphalia, Saarland, and Hamburg as part of the ARTUS group.

Ownership category

akta.pro rank

Product category

Property Damage Restoration Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (23822), Remediation Services (562910)

SIC

General Bldg Contractors - Residential Bldgs (1520)

akta.pro primary industry

Structural Drying, Dehumidification & Moisture Control (HSAPAOAB)

akta.pro secondary industries

Insurance Claims Estimation, Documentation & Managed Repair (HSAPAOAL), Interior Rebuild & Finishing (Drywall, Flooring, Paint, Trim) (HSAPAOAI), Leak Detection & Pipe Repair (HSAOAAAC), Emergency Leak Detection (Slab/Wall/Ceiling) (HSAOAMAD)

Keywords

• Water damage restoration
• Fire damage restoration
• Leak detection services
• Building drying services
• Mold remediation services

Headquarters

HQ city

Dortmund

HQ country

Germany

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Water Damage Restoration Services: Project-based professional services for water damage restoration including leak detection, technical drying, restoration and renovation. Revenue is generated through one-time service fees, typically billed per project and often coordinated directly with insurance companies.
2. Fire Damage Restoration Services: Complete fire damage restoration including cleaning, sanitization, deodorization, and full reconstruction services. Project-based professional service fees.
3. Building Diagnostics and Testing Services: Diagnostic services including building diagnostics, Blowerdoor measurements, special measurement procedures, and thermography inspections. These specialized testing services are billed as separate line items.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels5 records

Core offering

Herrmann GmbH provides end-to-end water and fire damage restoration services, beginning with non-destructive leak detection (gas trace, thermal imaging, endoscopy, canal TV) and extending through technical drying, mold remediation, building diagnostics, and full reconstruction. The company acts as a single contractor from initial detection through final reinstatement, serving insurance carriers, property managers, and private customers.

Product overview

Herrmann GmbH is a medium-sized enterprise group providing specialized services for water damage and fire damage restoration. The company offers a unified portfolio of eight integrated core services: Leckortung (leak detection), Technische Trocknung (technical drying), Wiederherstellung (restoration), Schimmelsanierung (mold remediation), Sondermessverfahren (special measurement procedures), Blowerdoor-Messung (blower door testing), Bauwerksdiagnostik (building diagnostics), and Brandschadensanierung (fire damage restoration). The services are designed to work together as a complete damage management solution - from initial leak detection and damage assessment, through technical drying and specialized measurements, to complete restoration and renovation. Customers include property management companies, insurance companies, and private individuals. The company operates as part of the ARTUS Bautrocknung- und Sanierungsgruppe with over 130 employees at 4 locations in NRW and additional locations in Hamburg area.

Differentiator

Problem solved

Functional benefit

Products and services

• Leak detection (Leckortung) Non-destructive location of water leaks using gas tracing, thermal imaging, video endoscopy, and canal TV inspection; intended for insurance cases, property managers, and private owners.
• Technical drying (Technische Trocknung) Professional drying of structures after water ingress using dedicated dehumidification and air movement equipment; delivered for insurance carriers, housing operators, and homeowners.
• Mold remediation (Schimmelsanierung) Identification, containment, and remediation of mold infestations in residential and commercial properties, including HEPA air filtration to protect occupants.
• Fire damage restoration (Brandschadensanierung) Cleaning, deodorization, and reinstatement of buildings after fire and smoke damage, including dry ice blasting for residue removal.
• Reconstruction (Wiederherstellung) Full reinstatement and reconstruction of structural elements after water, fire, or mold damage, completing the end-to-end restoration chain.
• Blower door measurement (Blowerdoor-Messung) Building envelope tightness testing using blower door equipment to identify air leaks; used to verify drying work and assess building performance.
• Special measurement procedures (Sondermessverfahren) Targeted diagnostic measurements (such as moisture mapping and material moisture testing) performed alongside or independently of leak detection and drying.

Quantifiable outcome

• 130+ employees across 6 locations providing coverage across NRW
• +2 more outcomes

Named customers9 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

15 partnerships are on record, tiered core and minor.

• Aquaplan GmbHcoreStrategic or Co-development Partner · 1 June 2025Aquaplan GmbH was merged into the Herrmann Unternehmensgruppe in June 2025. Aquaplan specialized in leak detection, defective water and heating pipes, and removal of firefighting water. The merger creates synergies in leak detection, drying, and restoration services.
• ARTUS Bautrocknung- und SanierungsgruppecoreStrategic or Co-development Partner · 1 January 2023Herrmann Unternehmensgruppe became part of the ARTUS group in 2023. ARTUS is a nationwide building drying and restoration group operating with nearly 2000 specialists. This partnership expands Herrmann's service capacity and provides access to a broader network of specialized companies across Germany.
• Hestia UnternehmensgruppecoreStrategic or Co-development Partner · 1 November 2020The Herrmann Gruppe became part of the Hestia Unternehmensgruppe in November 2020. Hestia is a parent company providing strategic direction and support for its subsidiaries in the building restoration sector.
• GSB Gebäude Schadenservice GmbHminorOthersPartner company within the Hestia/Herrmann group network. GSB is based in Maisach near Munich.
• Herrmann Nord GmbHminorOthersFormerly Herrmann-Franke GmbH & Co. KG, renamed and relocated from Buxtehude to Hamburg. Provides water damage services in the Hamburg metropolitan area.
• Herrmann Gebäudesanierung GmbHcoreOthersSubsidiary company specializing in building restoration. Originally DuweSan GmbH, spun off from Herrmann in 2015. Located in Sprockhövel.
• Kilic Schadenservice GmbHminorOthersPartner company in the Herrmann/Hestia network located in Neuenstein.
• Klaus Thiele Schadenmanagement GmbHminorOthersPartner company in the Herrmann network for damage management services in Stuttgart.
• Sanierungsservice Küpper GmbHminorOthersPartner company in the Herrmann network for restoration services in Geesthacht.
• SRT Friedrich GmbHminorOthersPartner company in the Herrmann network for restoration services in Sandhausen.
• Hestia Instandsetzung Management GmbHminorOthersParent group company providing management services, based in Munich.
• AllianzcoreChannel Partner/ Reseller/ DistributorMajor German insurance company that refers policyholders to Herrmann for water and fire damage restoration services.
• AXAcoreChannel Partner/ Reseller/ DistributorMajor German insurance company referring policyholders for restoration services.
• ERGOcoreChannel Partner/ Reseller/ DistributorMajor German insurance company referring policyholders for restoration services.
• GeneralicoreChannel Partner/ Reseller/ DistributorMajor German insurance company referring policyholders for restoration services.

Scale indicators6 records

Recent moves9 records

Expansion highlights5 records

Others

• Allianz SE (in-house services): Major German insurer and Herrmann channel partner. Relevant as both a key customer (referral source) and a potential vertical competitor if Allianz expands its own preferred-vendor or in-house restoration capabilities.
• Vonovia SE (in-house services): Largest German residential property manager and current Herrmann customer. Listed as an adjacent party because Vonovia has the option to insource more restoration work, representing both a customer and a potential competitive threat.

Regional players

• Nüthen Restaurierung GmbH: Restoration firm with presence in central/eastern Germany offering building drying and water damage services. Comparable technical offering but primarily serves a different geographic market than Herrmann's NRW heartland.

Broad incumbents

• BELFOR Deubling GmbH: German arm of BELFOR, the global leader in property damage restoration. Competes with Herrmann in water and fire restoration but operates with much greater scale, broader geographic coverage, and full-spectrum disaster recovery capabilities.
• Polygon Group (Germany): International property damage restoration group with German operations offering water damage restoration, drying, and document recovery. Overlaps with Herrmann across the core restoration service set but addresses a broader insurance and industrial customer base.

Direct peers

• ISOTEC GmbH: Specialist German water damage restoration and building drying franchise with comparable leak detection, technical drying and mold remediation services. Already named as a technology partner to Herrmann, confirming direct overlap in core service lines.
• Bock Sanierungstechnik GmbH: Regional German restoration services provider with overlapping capabilities in leak detection, technical drying, and fire/water damage restoration. Comparable in operating model and target customer segments.
• Stucki Sanierung GmbH: Mid-sized German water and fire damage restoration firm offering the same combined detection, drying, and rebuild services to insurers and private customers. Directly comparable regional competitor with similar insurance-channel reliance.
• GEFRO Trocknungstechnik GmbH: German water damage restoration specialist providing technical drying, leak detection, and mold remediation services. Operates with a comparable multi-trade, insurance-partnered model and is a relevant same-size peer.

Emerging players

• Sanier-Team GmbH: Smaller German restoration specialist with focus on water damage and mold remediation. Comparable service portfolio but smaller scale and more limited geographic footprint than Herrmann.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/ARTUS.BSG
• LinkedInde.linkedin.com/company/artus-bsg
• Instagraminstagram.com/artus_bsg

Compliance9 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries10 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 Herrmann