Building Construction

Isotech (Genève) SA 

Grand-Lancy · Since 2000

The core activity of ISOTECH Genève SA is the provision of services in the field of etanchéité, i.e. the sealing and tightness of buildings and facilities. The company has been offering its services for 50 years and has already worked for renowned clients such as UBS, Rolex, UEFA and Geneva Airport.

is-z planungsbüro GmbH 

Beinwil Am See · Since 2024

The core activity of the company "is-z planungsbüro GmbH" is the creation of formwork, reinforcement and excavation plans for civil engineering, particularly for small to large construction projects such as single-family homes and settlement developments. The company offers these services as an external partner for engineering offices and other companies, and is characterized by fast, cost-effective and flawless delivery of the plans.

Italianos GmbH 

Itingen · Since 2016

Italianos GmbH provides construction and building services and integrated solutions for buildings, including windows and doors, terrace coverings, blinds, heat pumps, photovoltaics, kitchens and air conditioning. Security systems such as alarm installations are offered via a partner company, and services also cover material procurement and project execution.

Ivan Steiner, Bauunternehmung 

Flumenthal · Since 1998

Ivan Steiner, Bauunternehmung provides construction services including building construction, civil engineering, renovations and conversions, landscaping and planning.

IVNI GmbH 

Mettmenstetten · Since 2019

IVNI GmbH is a construction company offering construction management, element (prefabricated) construction, façade construction and joint/sealing work. Services include project coordination from planning to completion, prefabricated element assembly, façade planning and execution for new builds and renovations, and sealing of joints.

Izona Group AG 

Pfäffikon Sz · Since 2023

Izona Group AG is a construction company providing planning and execution of new builds, conversions and renovations, along with structural work, demolition and façade services. Its offerings also include shutter installation, tile and parquet work and detailed interior finishing, with ventilation cleaning handled via a partner.

Jacques Lienher Sàrl 

Savagnier · Since 2008

The core activity of Jacques Lienher Sàrl is the execution of construction works, particularly in masonry, civil engineering and building renovation.

Jäggi + Hafter AG, Zweigniederlassung Regensdorf 

Regensdorf · Since 1950

Jäggi + Hafter AG, Zweigniederlassung Regensdorf is a construction company providing new-build, renovation and client-specific works as well as timber-construction and mastic-asphalt (Gussasphalt) services. The firm delivers building services from planning through execution and is part of the Wyss Gruppe corporate group.

Jäggi + Hafter AG 

Zurich · Since 1948

Jäggi + Hafter AG is a construction company that provides new-build, renovation, custom project, timber construction and cast-asphalt services. Work is carried out through dedicated departments, and the company is part of the Wyss Gruppe corporate group.

Jakob Furrer Baugeschäft Inh. Thomas Dobler 

Bäretswil · Since 2007

Jakob Furrer Baugeschäft Inh. Thomas Dobler carries out masonry work and services for new construction and renovation. Services include masonry, custom fabrications, consulting and project support for new builds and refurbishments.

J. A. N. Bau GmbH 

Siebnen · Since 2017

The core activity of J.A.N Bau GmbH is the provision of services in the construction industry, particularly in the areas of drywall construction, acoustics, fire protection, soundproofing, door assembly, demolition and disposal, as well as plastering work.

Jenny & Co. AG, Bauunternehmung 

Ennenda · Since 1994

The core activity of Jenny & Co. AG is construction, particularly in the field of building construction, with a wide range of activities including: industrial buildings, residential buildings, conversions, renovations, customer-specific masonry work, and redevelopment projects. The company thus offers a variety of services in the construction sector, ranging from small customer-specific masonry work to larger redevelopment projects.

Jesus Dapena AG 

Interlaken · Since 2011

The core activity of Jesus Dapena AG is construction with a focus on monument preservation, renovation, new construction, reconstruction and gardening. The company offers specialized services in the fields of civil engineering, structural engineering and natural stone masonry and has an experienced team of skilled workers, masons and polishers.

JJ Pereira Leite 

Geroldswil · Since 2019

JJ Pereira is a construction company offering a wide range of services in the field of building construction. The company's core activities include: * Renovation, restoration and insulation of facades * Renovation and modernization of kitchens * Renovation and modernization of bathrooms, showers and toilets * Laying of tiles (ceramic, porcelain, natural stone, mosaic) * Plastering work (lightweight walls, plastering, abrasion-resistant surfaces) * Design of gardens and terraces * Concrete drilling and masonry work * Drywall construction The company thus offers a comprehensive range of services for the construction and renovation of buildings and living spaces.

J. Merckx GmbH 

Büsserach · Since 2003

The core activity of J. Merckx GmbH is construction, including high-rise and civil engineering.

Josef Wiederkehr Stiftung 

Dietikon · Since 2008

The company is a construction company specializing in the construction of residential and commercial properties. The core activity of the company consists of planning, realizing and managing construction projects, particularly in the field of residential construction and commercial properties.

Jost Bau AG 

Wynigen · Since 2022

The core activity of Jost Bau AG is the construction and execution of construction projects in various areas, including: residential construction, renovation and refurbishment, civil engineering, public buildings, industrial and commercial construction, and agricultural buildings. The company offers services such as planning, execution and acceptance of construction projects and positions itself as a reliable partner for builders.

Kaiser Bauunternehmung GmbH 

Lohn-Ammannsegg · Since 2022

Kaiser Bauunternehmung GmbH is a construction company that provides building and civil engineering services, including new builds, extensions and renovations, external landscaping, masonry and small repair work.

Kamm AG, Filzbach 

Mühlehorn · Since 1983

Kamm AG, Filzbach is a construction company providing building and civil engineering services. Its offerings include residential and industrial construction, renovations and fair-faced concrete work, as well as demolition, earthworks, specialist deep-excavation works, drainage and utility installation, roadworks and bridge/concrete repair.

Käppeli Bau AG 

Sargans · Since 2007

Käppeli is a versatile service company specializing in the areas of construction, logistics, environment, and digitalization. The core activities include: Construction and recycling services, including the extraction of primary building materials, processing of recyclable materials, and disposal of inert materials; Logistics services, including transportation, storage, and transshipment of goods; Construction and engineering services, including building construction, civil engineering, road construction, and specialized civil engineering; Environmental services, including waste disposal and remediation of contaminated sites; Digitalization services, including the development of software solutions for the construction and logistics industries. The company also offers specialized services such as special transports, crane and aerial lift services, as well as consulting and sales of building materials and technologies.