What Paul Hartmann does

Paul Hartmann is a family-owned Sanitär-, Heizungs- und Klimatechnik (SHK) service provider based in Frankfurt am Main, Germany, founded in 1949 by master metalworker Paul Hartmann. The company is registered as Paul Hartmann Gas Wasser Heizung GmbH and operates from Kohlbrandstraße 10 in the Bornheim district. Its service portfolio covers bathroom design and renovation, heating systems (gas, oil, and renewable energy), sanitary facility installation and maintenance, gas-water installations, and regenerative energy solutions. The firm serves two primary customer segments — private homeowners (Privatpersonen) and business customers (Gewerbekunden) — within Frankfurt am Main and the broader Hessen region, with project credentials that include public infrastructure work such as gutter renovations at Frankfurt Hauptbahnhof.

The company's core technology is conventional skilled-trade service delivery, supported by an in-house scheduling system and an online bathroom planning integration with wholesale partner Erhart Haustechnik (part of GC Gruppe). No proprietary software, AI capabilities, or digital platform are disclosed. Operations rely on direct customer contact via phone (069 94 59 39 00) and the company website, with customer acquisition primarily driven by word-of-mouth referrals and the brand reputation accumulated over 75+ years of continuous operation.

The business model is professional services revenue, generated through one-time installations, ongoing maintenance and repair contracts, and coordinated bathroom renovation projects. Pricing is not publicly disclosed; quotes are provided on request following free consultations. The firm operates with approximately 16 personnel (8 qualified fitters, 5 apprentices, 3 master craftsmen/management) and has trained 39 apprentices and produced 7 master craftsmen (Meister) over its history. Authorized representatives are Miroslav Milanovic-Küstermann and Kurt Hartmann (Gas-Wasser-Installateur-Meister). The company remains under family ownership with no external investment, no funding rounds, and no subsidiaries.

Name

Paul Hartmann

Legal name

Paul Hartmann Gas Wasser Heizung GmbH

Website

https://paul-hartmann.de

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

11–50 employees

Short description

Paul Hartmann is a family-owned plumbing, heating, and sanitary service company in Frankfurt am Main, Germany. Founded in 1949, it provides bathroom design, heating, gas-water installation, and renewable energy services to private homeowners and businesses in the Frankfurt/Hessen region.

Ownership category

akta.pro rank

Product category

Plumbing and Heating Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Plumbing, Heating, and Air-Conditioning Contractors (23822)

akta.pro primary industry

Mechanical Piping, Pumps & Hydronics Maintenance (BPABACAB)

akta.pro secondary industries

Boiler Repair, Maintenance & Tune-Ups (HSAOACAD), Heat Pump Repair & Maintenance (HSAOAHAD), Boiler & Hydronic Heating Repair & Service (HSAOAHAG)

Keywords

• Plumbing services
• Heating installation
• Bathroom renovation
• Sanitary maintenance
• Gas water systems

Headquarters

HQ city

Frankfurt

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Installation Services: One-time installation services for plumbing, gas, and heating systems including complete new installations of sanitary, gas, and heating systems.
2. Maintenance and Repair Services: Ongoing maintenance and repair services for existing sanitary and heating installations, including scheduled maintenance of gas appliances.
3. Bathroom Design Services: Complete bathroom design and renovation services including planning, coordination of trades, and execution.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Paul Hartmann is a traditional plumbing and heating company (Sanitär- und Heizungsunternehmen) in Frankfurt am Main providing bathroom design and renovation, heating system services (gas, oil, and renewable energy), sanitary facility installations, and gas-water system installations. The company offers complete new installations as well as ongoing maintenance, repair, and emergency services for both private homeowners and commercial/public-sector customers within Frankfurt am Main and Hessen.

Product overview

Paul Hartmann is a traditional Sanitär- und Heizungsunternehmen (plumbing and heating company) offering a unified service portfolio focused on bathroom design and renovation, heating systems (gas, oil, and renewable energy), and general sanitary facility maintenance. The company provides complete new installations of sanitary, gas, and heating systems alongside ongoing maintenance and repair services. The core offerings consist of Badgestaltung (bathroom design), Heizung (heating services), Sanitäranlagen (sanitary facilities), and Gas-Wasser-Installation. The company positions itself as a full-service provider offering coordinated execution from planning through implementation for both private and commercial customers in Frankfurt am Main.

Differentiator

Problem solved

Functional benefit

Products and services

• Badgestaltung (Bathroom Design) Complete bathroom design and renovation services for residential customers in Frankfurt am Main, covering planning, consultation, and implementation of toilets, sinks, fixtures, showers, and bathtubs under the "Bad aus einer Hand" (single-source) coordination model.
• Heizung (Heating) Expert heating system services covering gas heating, oil heating, and renewable energy heating systems for residential customers, including installation, maintenance, and repair of heating installations.
• Sanitäranlagen (Sanitary Facilities) Installation, maintenance, and repair of sanitary systems for residential and commercial customers, including drain cleaning, fixture repairs, and general plumbing upkeep.
• Gas-Wasser-Installation (Gas-Water Installation) Complete new installations and maintenance of gas and water systems for residential, public, and industrial customers in Frankfurt am Main and Hessen.
• Regenerative Energien (Renewable Energies) Installation and maintenance of heating systems utilizing renewable energy sources as part of sustainable building solutions for residential customers.

Named customers4 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators3 records

Recent moves9 records

Expansion highlights3 records

Broad incumbents

• Vaillant Group: Major German heating and hot-water equipment manufacturer with a national installer/service partner network. Overlaps with Paul Hartmann on heating installations (gas, oil, heat pumps) but operates at national scale and as an OEM rather than as a local SHK contractor.
• Viessmann: Leading German manufacturer of heating, industrial and refrigeration systems with extensive service-partner network across Germany. Comparable in the heating and renewable-energy installation categories but operates as a global manufacturer, not a local trades contractor.
• Bosch Thermotechnology (Bosch Home Comfort): Manufacturer of heating and hot-water solutions (including Junkers/Bosch brands) with a Germany-wide installer and service-partner network. Overlaps on heating-system installation and maintenance but at manufacturer scale rather than local SHK contractor.
• Buderus: German heating-system manufacturer (part of Bosch) with strong installer/service-partner presence in residential and commercial heating. Comparable product overlap in gas, oil, and renewable heating installations but national manufacturer footprint rather than local contractor.
• Stiebel Eltron: German manufacturer of heat pumps, water heaters, and home comfort technology with an installer-partner network across Germany. Overlaps with Paul Hartmann's regenerative heating and water-heating installation offerings but is an OEM rather than local service provider.

Others

• GC Partners / GC Gruppe (parent of Erhart Haustechnik): Largest German sanitary, heating, and plumbing wholesale/distribution group; parent of Erhart Haustechnik, which is Paul Hartmann's named partnership. Enables bathroom design and supplies material to the company—adjacent ecosystem participant rather than direct competitor.

Regional players

• Mainova AG: Frankfurt-based municipal utility supplying electricity, gas, and district heating to the same Frankfurt market Paul Hartmann serves. Provides some heating-infrastructure and customer-acquisition overlap in the same region but operates as a utility, not an SHK trade contractor.

Emerging players

• SenerTec Kraft-Wärme-Energiesysteme: German micro-cogeneration (CHP) and small power producer equipment supplier with a regional partner/installer network. Adjacent to Paul Hartmann's gas-heating expertise and renewable-energy pivot, but focused on micro-CHP units rather than full plumbing/heating service.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

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 Paul Hartmann