Building Construction

Keller Construction GmbH 

Kreuzlingen · Since 2020

Keller Construction GmbH provides construction planning, project development, site management and execution services with a focus on timber construction, including interior fit-out, drywall, pitched roofs, facades and scaffolding.

KHB AG 

Fahrweid · Since 1984

KHB AG is a construction company that carries out piecework for formwork and masonry projects. Its services include formwork works with provision of formwork materials, slab formwork and masonry work, and the company operates its own fleet and workforce.

Kohler + Partner AG, Bauingenieure SIA/SVI/EUR 

Burgdorf · Since 2004

The core activity of Kohler + Partner AG is the provision of engineering and planning services in the construction industry, particularly in the areas of: district heating, slope stabilization, building construction, noise protection, civil engineering, and hydraulic engineering. The company offers services such as project planning, construction drawings and supervision, and is involved in the realization of construction projects in various fields.

Koller Bau und Immobilien GmbH 

St. Margrethen Sg · Since 2003

Koller Bau und Immobilien GmbH is a construction company carrying out building projects, including new construction, conversions and renovation work. It provides builder services, planning and construction-management support and customer masonry work for residential, commercial and infrastructure buildings.

Koller Bauunternehmung AG 

Schönholzerswilen · Since 2017

Koller Bauunternehmung AG is a construction company that carries out new builds, conversions and renovations in building construction. The company provides general builder services including planning and construction management and also performs smaller masonry and repair works.

Kraft AG Bauunternehmung 

Donzhausen · Since 1979

The core activity of Kraft AG is construction, particularly the new construction, renovation and extension of real estate in the AachThurLand region.

Kropf Bau 

Unterlangenegg · Since 2006

The core activity of Kropf baut encompasses comprehensive work in civil engineering and construction, including: Civil engineering: excavation, site layout, laying of drainage and sewage pipes; Construction: renovation, new construction, and renovation of single-family and multi-family homes; Agricultural construction: work in the agricultural sector; Watercourse maintenance: work on watercourses and stream construction; Environmental work: work on access roads, paths, garden walls, parking lots, and other environmental work. The company also offers comprehensive services as a master builder, including planning, execution, and supervision of construction projects.

Kundenmaurer Florian Imhof GmbH 

Ins · Since 2020

The company Kundenmaurer Florian Imhof GmbH is engaged in masonry work.

Kundenmaurer Epp/Jauch GmbH 

Erstfeld · Since 2013

The core activity of Kundenmaurer Epp/Jauch GmbH is the masonry trade, including related services such as core drilling, wall systems and high-rise construction. The company offers its services as a professional masonry business and has qualified personnel with corresponding training and certifications.

Küttel Bau AG 

Baden · Since 2008

Küttel Bau AG provides conversion and renovation work, customer masonry and plastering, as well as structural services including residential and commercial new-builds, extensions and office buildings. Its scope of services also includes building reinforcements, technical deconstruction, waterproofing and façade renovation, and the company states it uses modern, environmentally friendly techniques.

Landolt & Ackeret AG 

Hägglingen · Since 2005

The core activity of Landolt&Ackeret is the construction and renovation of real estate.

LEHMAG AG 

Brunnen · Since 2019

The core activity of LEHMAG AG is engineering and planning support for construction projects, particularly in the field of sustainable building with natural materials such as clay, rammed earth, trass lime and Leka soils. The company offers specialized services for the planning and execution of construction projects using these materials and has a wide range of reference projects in Switzerland and abroad.

Lengi Bau AG 

Herbriggen · Since 2024

The core activity of LengiBau AG is the execution of construction, civil engineering and road construction works, including: High-rise construction: new buildings and renovations, customer masonry; Civil engineering: parking lots, perimeter walls, floor slabs, curbstones, excavation work; Road construction: access roads, paving work, road maintenance, crack sealing; Transport: Jeep with trailer up to 2.7t, transporter up to 3.5t. The company thus offers a comprehensive range of construction and transport services.

Life Immobilien & Generalunternehmung AG 

Lindau · Since 2018

Life Immobilien & Generalunternehmung AG develops and delivers residential real estate projects and operates as a general contractor for planning, construction management and execution. The company supports projects from planning through sale and cooperates with partners on financing and fit-out.

Loftop AG 

Kreuzlingen · Since 2019

The core activity of Loftop AG is the investment, renovation and modernization of Swiss real estate, particularly historic buildings, in order to increase their value and achieve attractive returns for investors. The company focuses on enhancing the value of properties through professional renovation, innovative visions and professional construction management to create profitable investments.

Loretz SA, Interpresa da baghegiar 

Sedrun · Since 1960

LORETZ SA is a construction company whose core activity consists of carrying out civil engineering and building works, customer works, muckaway services, recycling/crushing services, snow clearing and real estate brokerage.

Lucini Hoch- und Tiefbau GmbH 

Wintersingen · Since 2005

The core activity of Lucini Hoch- und Tiefbau GmbH includes the professional renovation and conversion of properties, particularly in the areas of bathrooms, kitchens, and interior and exterior spaces. This includes the laying of tiles, natural stone, and ceramics, the implementation of statically tested spatial changes, such as breaking out walls and installing steel beams, as well as the creation of stairs and stair cladding.

Mammone AG 

Naters · Since 1995

Mammone AG is a construction company providing civil engineering, paving, and extension and renovation works. Services include sewer and utility-line installation and maintenance (drinking water, wastewater, stormwater, telephone, power), various paving and masonry works, and external site works such as forecourts, parking areas, natural stone walls and terrain adjustments.

M. Leu AG 

Vordemwald · Since 2004

The core activity of M. Leu AG is the provision of construction and masonry services, particularly in the areas of: customer masonry work, renovations, conversions and extensions, as well as specialized work such as composite stone work, diamond drilling and cutting, concrete renovation, building sealing, excavation and demolition work, drainage systems and retaining walls. The company also offers consulting and tendering services for construction projects, especially in the field of agricultural buildings.

Mock Bau GmbH 

Kallnach · Since 2015

The core activity of Mock Bau is the provision of construction services for interior and exterior areas, including planning, execution and project management of construction projects.