Plumbing & Building Services in
St. Margrethen SG

WWS Wärme- Wassertechnik AG

Since 1978 · 11–20 empl.·4.9(21)

The core activity of WWS Wärme- Wassertechnik AG encompasses the planning, execution and maintenance of projects in the areas of heating, sanitation, heat and water technology, including new construction, renovation, service work, repairs, industrial and public buildings as well as pipeline construction. The company offers comprehensive solutions based on the latest technology and focuses on cost-effective, environmentally friendly and alternative heating systems such as heat pumps and solar systems.

HPA Handel-Planung-Ausführung AG

Since 1992 · 1–10 empl.·4.3(19)

The core activity of hpa is the development and production of containers, in particular drinking water storage tanks, buffer tanks and combination tanks, as well as small series production.

Walter Bösch AG

Since 1983 · 101–500 empl.

The core activity of Walter Bösch AG is the development, manufacture and distribution of air handling units, heating, air conditioning and ventilation solutions, as well as building automation systems. In addition, the company offers comprehensive services such as customer service, maintenance, troubleshooting and renovation consulting.

TGS Technischer Gebäude Service AG

Since 2015 · 11–20 empl.

TGS Technischer Gebäude Service AG provides maintenance, servicing and modernization of building services systems. Its services cover heating, sanitary, solar, ventilation, air conditioning, refrigeration, electrical and safety systems; it also offers energy system solutions (heat pumps, photovoltaics, battery storage), digital monitoring via TGS Connect and a 24‑hour service.

LAMBDA Schweiz GmbH

Since 2021 · 1–10 empl.

The company Huggler Wärmepumpen specializes in the planning, installation and maintenance of heat pump systems.

GRAVAG Energie AG

Since 1979 · 21–50 empl.·2.7(9)

The core activity of GRAVAG Energie AG and GRAVAG Thermo is energy supply and service, particularly in the planning, installation, maintenance and repair of heating and energy systems, such as heat pumps, gas and oil heating systems, pellet heating systems, hybrid systems, power-generating heating systems, combined heat and power (CHP) systems and photovoltaic systems. In addition, the company offers energy consulting, energy analysis and optimization as well as the sale of energy.

ROHRFIX GmbH

Since 2026 · 1–10 empl.

ROHRFIX GmbH provides drain cleaning, camera inspections, pipe rehabilitation and a 24/7 emergency service. The company serves private households, property managers, plumbing firms, construction companies and other business customers with wastewater and drainage systems.

Hörburger AG Luft- und Klimatechnik

Since 1989 · 1–10 empl.

Walter Hepp GmbH

Since 2016 · 1–10 empl.

Prusevic EMPRU Haustechnik

Since 2017 · 1–10 empl.

Buhmann Consulting

Since 2017 · 1–10 empl.

Neptun Haustechnik GmbH

Since 2023 · 1–10 empl.