Site Preparation in the
Canton of St. Gallen
108 companies in Site Preparation based in the Canton of St. Gallen — name and year of registration from the commercial register.
50 of 108 companies
Heim Bohrtechnik AG
Since 2006 · 11–20 empl.4.9(158)
The core activity of HEIM Bohrtechnik AG is the planning and execution of geothermal drilling and well drilling, particularly for the extraction of geothermal energy. The company offers consulting, planning and execution of drilling services to extract geothermal energy for buildings.
Oberhänsli Bau AG
Since 2011 · 51–100 empl.5.0(23)
Oberhänsli Bau AG is a construction company providing demolition, concrete processing and above- and below-ground building works. Its services also include plastering and base-slab work, tile coverings, site/landscaping work, architectural/project management, real-estate offerings and a mobile children’s construction-site program.
Willi Bau AG
Since 2005 · 51–100 empl.4.9(17)
Willi Bau AG is a construction company offering building and civil engineering services, including excavation, demolition, utility and road works. Its services also include system waterproofing with warranty and project work for commercial and public clients.
Früh Tiefbau GmbH
Since 2000 · 1–10 empl.4.8(38)
Früh Tiefbau GmbH provides civil engineering and earthworks services as an independent small contractor. Its offerings include installation of underground utilities, spring capture, excavation, construction of small access roads, landscaping and garden works, interlocking stone surfaces, demolition and renovation work.
Bürge Kaminbau
Since 1996 · 11–20 empl.4.7(25)
The core activity of Bürge AG involves the processing of high-quality pre-fabricated components into complex, high-functional systems, particularly in the areas of geothermal drilling, chimney construction, silencers, residential heating and chimney systems. The company also offers special custom-made products and in-house developments, and has a department dedicated to geothermal drilling.
M. Vetsch AG
Since 1999 · 1–10 empl.4.8(20)
The core activity of M. Vetsch AG is the supply of beverages to customers, particularly through a delivery service, as well as the operation of a pick-up market and the provision of event catering services.
Oberhänsli Bau AG
Since 2018 · 1–10 empl.5.0(23)
Oberhänsli Bau AG is a construction company providing building and civil engineering services, including demolition and concrete processing, as well as structural, interior finishing and exterior/site works. The company also delivers architecture/construction management and project management services and is involved in real estate projects.
KOM AG Betontrenntechnik
Since 2021 · 11–20 empl.4.9(23)
KOM AG Betontrenntechnik provides concrete drilling and cutting services, including core drilling, concrete cutting, diamond wire sawing and joint cutting. Work is performed with low-vibration methods, powerful equipment and highly trained personnel to separate structural elements precisely and without damage to surrounding construction.
Jakob Schneider AG
Since 1979 · 21–50 empl.4.5(11)
The core activity of J. Schneider AG includes construction and civil engineering, including renovation/refurbishment, customer masonry work (such as tiling, plastering, exterior insulation, etc.) as well as environmental work and excavation services.
John & Sommer Bau AG
Since 2011 · 11–20 empl.4.6(15)
The core activity of John + Sommer Bau AG is construction, including the execution of construction projects, demolition work and customer work in the field of construction.
KOF AG
Since 2019 · 21–50 empl.4.9(23)
KOF AG provides demolition, dismantling and deconstruction services, covering project planning, execution and material disposal. Services include specialist dismantling (steel, bridge and tank removal), interior stripping, concrete drilling and cutting, with an emphasis on material reuse and recycling.
LG Bau AG
Since 2013 · 21–50 empl.4.8(6)
The company's core activities include construction, gravel and concrete plant, general contracting, road construction, civil engineering, structural engineering, plastering, facade construction, drywall construction, fireproofing, sealing, building renovation, special flooring, drilling and milling work, crack injection, concrete renovation, conversion and renovation.
Zulian + Co. AG
Since 1993 · 1–10 empl.4.9(7)
Zulian + Co. AG is a construction firm offering masonry and plastering services, demolition and small concrete works, as well as repairs and concrete restoration.
Stemba AG
Since 2018 · 1–10 empl.5.0(17)
The core activity of Stemba AG is trenchless deep construction, particularly earth sounding drilling and controlled flushing drilling technology. This includes: earth sounding drilling, controlled flushing drilling technology (horizontal drilling technology), deep construction, house connections using earth rockets and controlled pressing equipment, pipeline detection, PE pipe transport and welding. The company carries out these activities to enable crossings of roads, tracks, intersections, streams, etc. that cannot be carried out or are not permitted using conventional trenching methods.
Broder AG
Since 1970 · 1–10 empl.4.8(4)
Broder AG is an engineering and services company operating in energy technology, precast element construction and mechanical engineering. Its services include geothermal borehole drilling, connection lines, prefabricated garages and machinery engineering.
Gebrüder Mahler AG
Since 1992 · 21–50 empl.5.0(5)
The company is a family-owned business in the construction industry, specializing in master builder services and comprehensive construction solutions. The core activities include: master builder services (new construction, renovation, refurbishment), comprehensive construction solutions (planning, project development, construction management, environmental work), consulting and accompanying customers in construction projects, and executing construction projects with its own team and partners. Thus, the company offers comprehensive services in the field of construction, from planning to execution of construction projects.
B&B bautech GmbH
Since 2016 · 21–50 empl.5.0(7)
B&B bautech GmbH is a construction and installation company that provides plumbing installations, maintenance services, demolition and renovation works, core drilling and concrete cutting, and photorealistic 3D bathroom planning.
Britt AG
Since 1985 · 1–10 empl.4.6(9)
The core activity of Britt AG is the execution of specialized work in the field of construction, particularly: drilling in concrete and natural stone, cutting and sawing of concrete and masonry, even in difficult spatial locations, concrete demolition and dismantling, earth drilling and excavation work with earth rockets, reinforcement of components with CFRP laminates, and execution of pipe and cable penetrations as well as anchorages for foundations, walls and bridges.
Bruno Mattle AG
Since 2010 · 21–50 empl.5.0(8)
The core activities of Bruno Mattle AG include the following services: excavation and civil engineering, demolition of buildings, hydraulic engineering and environmental protection (e.g. construction of dams for flood protection or natural ponds), gravel processing (with mobile screening plant), and environmental work (e.g. implementation of customer requests and projects). The company thus offers a wide range of services in the fields of construction and environmental technology.
Gebr. Hermann AG
Since 1993 · 1–10 empl.5.0(4)
Gebr. Hermann AG is a construction company offering road construction, civil engineering (earthworks), building construction, landscaping/site works and demolition services. The company maintains its own machinery and vehicle fleet to perform transport, excavation and paving works.
Eugen Brunschwiler
Since 1981 · 1–10 empl.
The core activity of Eugen Brunschwiler Bauunternehmung is the provision of services in the field of construction, particularly: * Building construction * Civil engineering * Demolition work * Excavation * Scaffolding work * Environmental work * Utility lines * Construction yard The company thus offers a wide range of construction services, from planning and execution of construction projects to specialized services such as demolition work and scaffolding work.
F. Zeller AG
Since 1985 · 11–20 empl.
F. Zeller AG is a construction company offering building construction and civil engineering services, along with demolition, renovations and remodelling, site works, waterproofing, core drilling and dry-stone wall construction.
Gebrüder Kressig Generalunternehmung AG
Since 1992 · 1–10 empl.
Gebrüder Kressig Generalunternehmung AG provides general contracting services in building construction, including planning, site management and execution. Its offered services include demolition, exterior façades, master-builder (baumeister) work, roofing, flooring, external/site works, renovations, carpentry and rental of residential properties.
Gämperli Bau GmbH
Since 1994 · 1–10 empl.
The core activity of Gämperli Bau is the execution of civil engineering works, particularly in the areas of: earthworks, excavation works, stone walls, work in steep terrain, road and square construction, hydraulic engineering, demolition works, winter services, and contract work. The company thus offers a wide range of services in the field of civil engineering and positions itself as a flexible and reliable partner for customers in Eastern Switzerland.
Fensterle Beton- und Fertigteilwerk GmbH
Since 2006 · 11–20 empl.
The core activity of Fensterle company encompasses the planning, manufacturing and construction of family homes, object buildings and other construction projects, particularly using massive lightweight concrete walls produced in its own concrete and precast plant.
John+Bärtsch, Immobilien Bewirtschaftung, Inh. Hans Bärtsch
Since 2009 · 1–10 empl.
John+Bärtsch, Immobilien Bewirtschaftung, Inh. Hans Bärtsch is a construction firm offering building construction, civil engineering, conversion, renovation and demolition services, including excavation, earthworks and sewerage works.
Boxler Bau GmbH
Since 2009 · 1–10 empl.
The core activity of Boxler Bau GmbH is the execution of renovations, restorations, refurbishments, conversions, facade renovations, floor slab work and garden design.
Linth Tiefbau GmbH
Since 2011 · 1–10 empl.
The core activity of Linth-Tiefbau GmbH is civil engineering, particularly: excavation, road construction, surfacing, pipeline construction, drainage, maintenance, repair, and renovation. The company offers these services for various projects, ranging from single-family homes to residential complexes and large construction sites.
E. Thurnherr AG, Altstätten, Zweigniederlassung Oberriet SG
Since 2014 · 1–10 empl.
E. Thurnherr AG, Altstätten, Zweigniederlassung Oberriet SG is a construction company offering road construction, civil engineering, garden landscaping and transport services. Services include excavation and sewer works, slope stabilization, natural stone walls, demolition, recycling and snow clearing.
Rupp Bau AG
Since 2015 · 1–10 empl.
The core activity of Rupp Bau AG is the planning and execution of construction projects, particularly in the field of high-rise construction, such as the construction of single-family and multi-family homes, residential developments and other real estate properties.
Ulmann Betonbearbeitung AG
Since 2016 · 1–10 empl.
The core activity of Ulmann Betonbearbeitung AG is the processing of concrete using various methods such as drilling, sawing, cutting, separating and pressing, as well as the use of demolition robots and the execution of anchor installations.
Oberhänsli Bau AG
Since 2018 · 51–100 empl.4.4(16)
Oberhänsli Bau AG provides building-technology services including plant construction, installation, maintenance and renovation. The company website states that Hälg Group has taken over Oberhänsli AG Gebäudetechnik while the team and the site remain in place.
Peter Marquis Baggerbetrieb AG
Since 2018 · 1–10 empl.
Peter Marquis Baggerbetrieb AG provides demolition, excavation and recycling services. The company carries out earthworks, landscaping, stone wall construction and stream stabilization, and installs utility lines, operating an on-site recycling facility to process demolition material into RC gravel. Its equipment includes a fleet of excavators in various weight classes and a range of attachments such as hammers, grapples and concrete crushers.
Karl Bürki GmbH
Since 1999 · 1–10 empl.5.0(4)
The core activity of Karl Bürki GmbH is civil engineering, particularly: * Civil engineering works * Road construction * Environmental works * Natural stone paving and walls * Transport services * Blasting services * Spring catchments * Asphalt works * Excavation works * Concrete roads * Demolition * Trenching services * Pipeline construction * Winter maintenance services The company thus offers a wide range of services in the field of civil engineering and infrastructure.
Wilhelm Büchel AG
Since 2019 · 11–20 empl.
The core activity of Wilhelm Büchel AG is providing services in the construction sector, including general construction, civil engineering, special foundation work, scaffolding, demolition, road construction, landscaping, drilling and milling, as well as handyman services. The company offers these services to various customer groups, including private clients, corporate clients and institutional clients.
Zobohr AG
Since 2007 · 1–10 empl.4.7(3)
Zobohr AG carries out drilling and milling work on concrete and stone and provides contact information on its website.
SBO AG
Since 2016 · 1–10 empl.5.0(4)
The core activity of SBOAG is providing suction dredger services to various industries, including civil engineering, construction, horticulture, renovation, emergency services, agriculture, industry, companies, property management and private individuals. The suction dredger is used to absorb and remove materials of all kinds, such as excavated soil, gravel, sludge, grit, manure, feed, wood chips, sawdust, slag, dust, water and ash.
Bohrmann GmbH
Since 2021 · 1–10 empl.5.0(6)
The core activity of Bohrmann company encompasses selective demolition services, in particular: diamond wire sawing, slab sawing, wall sawing, curb cutting, diamond core drilling, Brokk robot demolition, and surface preparation. Furthermore, the company also offers drilling services, such as: drilling of borehole pipes, vertical wall drilling, drilling in confined spaces, core drilling, wire-bound drilling, high-reach drilling, compaction injection, and packer placement of jointing compound. The company supports customers in the construction, industry, manufacturing, and power generation sectors in the execution of construction projects.
Schmucki AG
Since 1981 · 21–50 empl.3.4(5)
The core activity of Schmucki AG is the realization of projects in civil engineering and construction, as well as the execution of plastering and customer masonry work.
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.
HOLENSTEIN AG, Bauunternehmung
Since 1973 · 11–20 empl.5.0(1)
The core activity of Holenstein AG is construction, particularly in the areas of: building construction, civil engineering, renovations and extensions, customer work, and skip container services. The company thus offers a wide range of construction services, from new buildings to renovations and refurbishments to specialized services such as skip container services.
Tiefbau Rupp AG
Since 1986 · 1–10 empl.4.8(5)
The core activity of Tiefbau Rupp AG is the execution of civil engineering works, in particular: river engineering, blasting work, steep slope construction, pipeline construction, forest road construction, road construction, site preparation, environmental design, and demolition work. The company offers these services to private individuals, farmers, forestry companies, municipalities, and the canton in the Sarganserland region.
Wellauer AG Zuzwil SG
Since 1963 · 1–10 empl.4.0(8)
Wellauer AG Zuzwil SG is a construction company offering road construction, civil engineering, specialist deep foundation works, transport services and gravel quarry operations. The website presents the company’s service offerings and corporate information.
Gebr. Grünenfelder AG, Bauunternehmung, Wangs
Since 1977 · 1–10 empl.4.8(4)
The core activity of Gebrüder Grünenfelder Bauunternehmung is construction and civil engineering, particularly in the areas of construction, winter services and surveying. The company offers services such as building, renovation and refurbishment of buildings as well as civil engineering works.
Mannhart BauTech AG
Since 2018 · 1–10 empl.4.8(4)
The core activity of Mannhart BauTech AG is the repair, maintenance and rental of construction machinery, agricultural machinery and other vehicles, as well as the sale of construction machinery and accessories. The company also offers a mobile hydraulic service and a rental fleet of construction machinery.
Johann Loher AG, Montlingen
Since 1973 · 11–20 empl.5.0(4)
The core activity of Joh. Loher AG is construction, including planning and implementation of construction projects, plastering work, renovations and comprehensive solutions for customers.
Richi Egli Baggerbetrieb GmbH
Since 2005 · 1–10 empl.5.0(3)
Richi Egli Baggerbetrieb GmbH carries out excavation, civil engineering, road construction, site landscaping and demolition works. Services include utility trenching and use of tracked excavators, telehandlers and other construction machinery.
Forrerbau AG
Since 2013 · 11–20 empl.5.0(1)
The core activity of Forrerbau AG encompasses the provision of services in the construction sector, specifically: * Building construction (realization of buildings of all kinds and sizes for residential or commercial purposes) * Civil engineering (excavation, foundation work, etc.) * Road construction (construction and maintenance of roads) * Building services (planning and installation of heating solutions, sanitary and bathroom designs) * Renovation work * Demolition * Blasting * Environmental work The company thus offers a wide range of construction-related services, from planning to execution.
A. Dachrückbau GmbH
Since 2024 · 1–10 empl.5.0(7)
The core activity of A. Dachrückbau GmbH is the professional dismantling and disposal of flat and pitched roofs, including related services such as waste management, protection and sealing, consulting and planning.
Schefer Bau AG Niederhelfenschwil
Since 2014 · 1–10 empl.5.0(4)
The core activity of Schefer Bau AG is the provision of construction services in the areas of building construction, civil engineering, demolition and environmental works.
Site Preparation in the Canton of St. Gallen
Site Preparation in the region
Point size by number of companies per place.
Source: commercial register (Zefix) · as of October 10, 2026
Largest places
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