Building contractor in
Widnau

10 companies in Building contractor based in Widnau — name and year of registration from the commercial register. The list below shows them all.

Companies

All 10 companies in Widnau

Sohm AG Schweiz Logo

Sohm AG Schweiz

Since 2011 · 51–100 empl.

Sohm AG Schweiz delivers timber construction projects for residential, commercial, agricultural and public use. Its services include consulting, planning, design, prefabrication and construction, ranging from individual project phases to turnkey delivery.

Building contractorBuilding constructionDiagonalDübelholzMass timber construction for single-family houses
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #1
Kurt Heule GmbH Logo

Kurt Heule GmbH

Since 2014 · 1–10 empl.

Kurt Heule GmbH provides hygiene inspections, cleaning and maintenance for ventilation systems. Its other services include filter servicing, photovoltaic panel cleaning and flat-roof maintenance.

Building contractorVentilation hygiene and ventilation cleaningHygiene inspection according to VDI 6022Cleaning of photovoltaic systems
ranQ Trust Score 4.1 out of 5.0, rated High, Rank #2
Köppel-Vogel AG Logo

Köppel-Vogel AG

Since 1966 · 1–10 empl.5.0(2)

Köppel-Vogel AG is a construction company working in building, civil engineering and ground engineering. Its services include residential and industrial construction, civil engineering works, pile foundations and sheet piling.

Building contractorBuilding constructionCivil engineering
ranQ Trust Score 4.0 out of 5.0, rated High, Rank #3
Gebr. Kühnis AG, Widnau Logo

Gebr. Kühnis AG, Widnau

Since 1972 · 1–10 empl.5.0(4)

The core activity of Gebr. Kühnis AG is the execution of civil engineering and construction work. Specifically, this includes pipeline construction, excavation, environmental work, earthwork, construction of forecourts, as well as the realization of high-rise buildings such as single-family homes, residential buildings, office and industrial buildings.

Building contractorAbove-ground constructionUnderground constructionChimney construction
ranQ Trust Score 4.0 out of 5.0, rated High, Rank #4
HA

HANSESUN AG

Since 2007 · 1–10 empl.

Building contractor
No score yet
BG

BauStar GmbH

Since 2009 · 1–10 empl.

Building contractor
No score yet
R1

RF-Promotion 1 AG

Since 2015 · 1–10 empl.

Building contractor
No score yet
IG

Immoabteilung GmbH

Since 2017 · 1–10 empl.

Building contractor
No score yet
AG

a-workz GmbH

Since 2021 · 1–10 empl.

Building contractor
No score yet
J&

J & A Service GmbH

Since 2023 · 1–10 empl.

Building contractor
No score yet

Building contractor in Widnau

10Building contractorCommercial register (Zefix) · as of November 6, 2026
2014Median year of registrationCommercial register (Zefix) · as of November 6, 2026
384in the Canton of St. GallenCommercial register (Zefix) · as of November 6, 2026
5,330in SwitzerlandCommercial register (Zefix) · as of November 6, 2026
Locations

Building contractor in the region

Point size by number of companies per place.

Source: commercial register (Zefix) · as of November 6, 2026