Civil Engineering

Koch AG, Strassen- & Tiefbau, Kies & Beton 

St. Gallen · Since 2009

Koch AG, Strassen- & Tiefbau, Kies & Beton carries out road and civil engineering works and provides demolition, trackwork, hydraulic and specialised construction services. The company operates a quarry and a gravel/concrete plant, runs recycling and landfill services (including an excavation-washing facility) and offers transport, skip services and ready-mix concrete delivery with pump.

Koch Strassen- & Tiefbau AG Gais 

Gais · Since 1984

Koch Strassen- & Tiefbau AG Gais provides road and civil engineering services and operates aggregate and concrete production with quarry and recycling facilities. The company also offers transports, skip (mulden) services, demolition, landfill/repository management and delivery of construction materials including concrete pumping.

Kohler Construction SA 

Apples · Since 2012

Kohler Construction SA is a general construction company providing building and renovation services. It carries out projects such as villa construction, building renovation and civil engineering, and offers earthworks, reinforced concrete, masonry, façades, external landscaping, core drilling and property development services.

König Bau GmbH 

Madiswil · Since 2007

The company königbau - madiswil is primarily engaged in the construction and renovation of buildings, including high-rise and civil engineering, as well as providing services in the field of construction economics.

Kreissel Bau GmbH 

Wattwil · Since 2014

Kreissel Bau GmbH provides construction services and site management for private and commercial clients, including building and civil works, masonry and concrete work, plastering and external insulation (EPS/XPS). Services also include landscaping and garden construction, natural stone and paving work, and extension, renovation and modernization projects.

Künzi AG Köniz 

Köniz · Since 1973

Künzi AG Köniz is a construction company offering civil engineering, road construction, utility-line installation, site/landscaping works and specialised services. Services listed on the website include excavation and foundation works, pavement and drainage works, and specialist tasks such as core drilling, wall openings and truck transport with a loader crane.

Kurt Heule GmbH 

Widnau · Since 2014

The core activity of Kurt Heule GmbH is the provision of services in the field of ventilation hygiene, ventilation cleaning and maintenance, as well as the cleaning of photovoltaic systems and flat roofs. Specific services include: Hygiene inspection according to VDI 6022, ventilation cleaning for industry and commerce, cleaning of exhaust air systems, bathroom and toilet facilities, MFH residential ventilation, comfort ventilation and Minergie systems, filter service, cleaning of photovoltaic systems, and flat roof maintenance. The company positions itself as a reliable partner for these services in the region.

Landolt + Co AG Bauunternehmung 

Kleinandelfingen · Since 1994

The company's core activity is the execution of master builder works, including new constructions of all kinds, renovations of old properties and facades, renovation, conversion, drilling and scaffolding works. In addition, the company also offers specialized services for the interior of buildings, such as masonry work.

Langenegger AG, Hoch- und Tiefbau 

Appenzell · Since 1977

The core activity of Langenegger AG is the execution of construction and civil engineering works, particularly in the areas of new buildings, renovations, plastering and exterior insulation. The company primarily offers its services in the Appenzell region and specializes in carrying out construction projects for private clients and architects.

La Transfo Sàrl 

Féchy · Since 2018

The core activity of La Transfo Sàrl is the execution of construction and engineering works, particularly in the following areas: demolitions and dismantling, transformation works (renovation and refurbishment), interior masonry, exterior developments, civil engineering and connections, and the rehabilitation of existing structures. The company thus offers a wide range of services in the construction and engineering sector, from planning to the execution of construction projects.

Lauber Ernest & Sohn Hoch- & Tiefbau AG 

Zermatt · Since 1969

Lauber Ernest & Sohn Hoch- & Tiefbau AG provides building and civil engineering services, including specialized construction works. Its services cover building construction (residential buildings, hotels, ropeway/railway stations), renovations, infrastructure and utility works, avalanche and rockfall protection, securing works (anchors, retaining structures, blasting masts) and cost estimation.

Laurent Mottiez, Aménagements extérieurs Sàrl 

Collonges · Since 2002

Laurent Mottiez, Aménagements extérieurs Sàrl provides exterior landscaping and earthworks services, including site preparation, excavation, controlled blasting and snow removal. The company carries out controlled blasting with the necessary permits and adheres to Swiss safety and environmental standards.

LB Vermietungen GmbH 

Löhningen · Since 2024

LB Vermietungen GmbH rents construction machinery, carries out excavation works and provides qualified machine operators. The company offers flexible rental periods (hourly, daily or weekly), regular machine maintenance and transparent pricing.

Leitungsbau GmbH Plus 

Arni Be · Since 1997

Leitungsbau GmbH Plus performs pipeline construction and provides processing and installation of water, gas, power and ARA pipelines. Services include PE and PP butt welding, extruder welding, electrofusion fittings and connectors, installation and processing of cast-iron pipes, fabrication of PE segment bends and pressure testing.

Lemifer Sàrl 

Belfaux · Since 2017

The core activity of Lemifer Sàrl is the installation of steel reinforcement for concrete structures, particularly for construction projects of all sizes.

Lemmenmeier Bauleistungen GmbH 

Bussnang · Since 2018

The core activity of Lemmenmeier Bauleistungen GmbH is the provision of construction services, particularly in the areas of road construction, civil engineering and excavation work, as well as the execution of contract work for companies and private individuals. This includes, among other things, the management of construction sites, the execution of utility lines, sewage systems, excavations and earthworks as well as demolition and reconstruction work.

Lenherr Strassenmarkierungen AG 

Gams · Since 1990

The core activity of Lenherr Strassenmarkierungen AG is the execution of marking work for roads, parking lots, industrial halls and other areas. This includes in particular: road markings, parking lot markings, hall markings, surface coatings, tactile markings for the visually impaired, traffic calming measures, zone markings, and lettering of company logos and other texts. The company offers these services to private individuals, businesses, municipalities and cantons in Eastern Switzerland and the Principality of Liechtenstein.

Leonhard Weiss Bau AG 

Regensdorf · Since 2001

Leonhard Weiss Bau AG is a construction company providing planning and execution services for infrastructure projects. Core areas include rail engineering and track construction, road and civil engineering, turnkey construction, network construction and raw materials (asphalt, concrete), as well as structural repair and project management; the company also uses Building Information Modeling.

Leuenberger Tiefbau AG 

Schalchen · Since 2018

The core activity of Leuenberger Tiefbau AG is civil engineering and road construction, including: demolition and disposal services (deconstruction, mechanical demolition, selective demolition), excavation of building pits, installation of utility lines (water, sewage, telecommunications and power lines), maintenance of rural roads (construction and maintenance of non-asphalted roads), stone walls and squares, and stream constructions. The company offers these services to private individuals, municipalities and companies in the Zurich region.

LGT Geolab AG 

Obergösgen · Since 1996

LGT Geolab offers laboratory and field investigations in the fields of geotechnics and clay mineralogy, particularly for construction projects. The core activities include: Field investigations: core drilling, dynamic probing, piezometers, isotope probes, plate load tests, vacuum tests, and sampling of materials. Laboratory investigations: permeability tests, consistency limits, grain size distribution, oedometer tests, Proctor tests, water content, soil analysis, and classification. Clay mineralogical analyses: loss on ignition, carbonate content, grain density, shrinkage limit. Suspected contaminated site and old landfill investigations. The company thus supports the planning and execution of construction projects by investigating and analyzing soil and materials.