i+R Industrial and Commercial Construction AG

i+R Industrial and Commercial Construction AG is a Swiss construction company specialising in industrial and commercial building, municipal building projects, hotel construction, renovation and refurbishment, and residential construction. It operates as part of the i+R Gruppe, a construction, real-estate and construction-machinery group whose origins lie in carpentry and timber construction and which today describes itself as one of the leading construction and real-estate companies in the Lake Constance region. The company's core service is the general-contractor (Generalunternehmer) model. In this role i+R takes responsibility for executing and coordinating the entire construction work package on behalf of the client, rather than the client awarding and managing individual trades. i+R coordinates subcontractors, construction sequences, schedules, quality and interfaces, and delivers the building turnkey. The company positions this model as particularly suitable for industrial and commercial buildings where many technical, functional and scheduling requirements converge — production processes, storage and logistics areas, office space, building services, fire protection, energy supply and future expandability. Within the wider i+R Gruppe, the Swiss industrial and commercial construction arm sits alongside timber construction, real-estate development, construction-machinery trading (including Takeuchi excavators and Martin excavator attachments), equipment rental and digital platforms. The group traces its history back more than a hundred years to a carpentry business, and has been restructured since 2012 into a holding structure with independent operating subsidiaries under the management of Reinhard Schertler, who succeeded his father Günter Schertler. Recent project activity illustrates the company's positioning: i+R acts as general contractor for the Bücklepark residential quarter in Konstanz on the former Siemens site for WOBAK Konstanz, as total contractor for the timber-hybrid extension of the Allgäu-Gymnasium in Kempten, and as general contractor for the roughly EUR 40 million "Quartier am Schlosspark" residential project in Donaueschingen for naturenergie. The company also works on office and service buildings such as the JTI service building in Eschen and the EnDes office building in Winterthur, and has received awards for timber construction, including two distinctions at the first Austrian State Prize for Timber Construction for the Hohenems town hall and the Hittisau schools.

The i+R Gruppe traces its origins to a carpentry business founded more than a hundred years ago, from which it developed into a construction, real-estate and construction-machinery group. The group describes its origin as lying in timber construction, with expertise that today extends far beyond it. A decisive turning point came in 2012, when Reinhard Schertler entered as managing partner, succeeding his father Günter Schertler. This began a restructuring of the company into a new holding structure: the individual business areas were converted into independent, operating subsidiaries. In 2013 the group opened its LEED-certified corporate headquarters on the new company premises on Johann-Schertler-Straße in Lauterach, Austria. Günter Schertler died in 2014. The group expanded its machinery and equipment business in the following years. In 2015 it acquired Martin GmbH in Braz, Austria, a specialist in excavator attachments such as excavator buckets and quick-couplers that had long been a business partner of Huppenkothen. In the same year it founded the technology startup SUNCAR, whose first "purring" excavator was developed and immediately awarded the Swiss Solar Prize. In 2018 construction began on the new Martin GmbH corporate headquarters in Ludesch, and in 2019 the group acquired Lorenz Lift GmbH in Feldkirch, a rental business for aerial work platforms and construction machinery, and expanded the Huppenkothen operations at its Lauterach headquarters. Also in 2019, the group founded Digando, a digital platform for construction machinery rental, and introduced a new brand identity — a umbrella brand connecting the brand world of the i+R Gruppe. In 2023 a new production hall with a state-of-the-art manufacturing facility for timber element construction was added to i+R Holzbau following the conversion and extension of 2019. A further Martin production site was established in Straß in Styria, with excavator bucket production starting there in autumn 2025. Within this group, i+R Industrial and Commercial Construction AG represents the Swiss industrial and commercial construction business. It works as a general contractor and total contractor on industrial, commercial, municipal, hotel, renovation and residential projects. Its project portfolio in the Lake Constance region and beyond includes the Bücklepark residential quarter in Konstanz on the former Siemens site for WOBAK Konstanz, the timber-hybrid extension of the Allgäu-Gymnasium in Kempten, the "Quartier am Schlosspark" residential project in Donaueschingen for naturenergie, the JTI service building in Eschen and the EnDes office building in Winterthur. The group's timber-construction expertise is reflected in awards such as two distinctions at the first Austrian State Prize for Timber Construction for the Hohenems town hall and the Hittisau schools.

• 2026

  Groundbreaking for the "Quartier am Schlosspark" residential project in Donaueschingen; topping-out for the EnDes office building in Winterthur; two awards at the first Austrian State Prize for Timber Construction.

• 2025

  Excavator bucket production starts at the new Martin production site in Straß in Styria in autumn.

• 2023

  New production hall with a state-of-the-art manufacturing facility for timber element construction added to i+R Holzbau.

• 2019

  New brand identity for the i+R Gruppe; founding of Digando, a digital platform for construction machinery rental; acquisition of Lorenz Lift GmbH in Feldkirch; expansion of Huppenkothen operations at the Lauterach headquarters.

• 2018

  Construction start of the new Martin GmbH corporate headquarters in Ludesch.

• 2015

  Acquisition of Martin GmbH in Braz, Austria, a specialist in excavator attachments; founding of the technology startup SUNCAR, whose first excavator won the Swiss Solar Prize.

• 2014

  Death of Günter Schertler.

• 2013

  Opening of the LEED-certified i+R Gruppe corporate headquarters on the new company premises on Johann-Schertler-Straße in Lauterach, Austria.

• 2012

  Restructuring into a new holding structure begins under Reinhard Schertler, succeeding his father Günter Schertler; business areas become independent operating subsidiaries.

One of the leading construction and real-estate companies in the Lake Constance region, offering a single central contract partner for complex industrial and commercial building projects.

• General-contractor construction services

  Responsibility for execution and coordination of construction work, including subcontractor coordination, scheduling, quality control, cost control and turnkey handover.

• Industrial and commercial buildings

  Buildings for production processes, storage and logistics areas, office space, building services, fire protection and energy supply.

• Municipal building projects

  Public-sector construction such as schools and town halls.

• Hotel construction

  Construction of hotel buildings.

• Renovation and refurbishment

  Renovation and refurbishment of existing buildings.

• Residential construction

  Residential quarters and housing projects.

1. 1Generalunternehmen - i+R Industrie- und Gewerbebau - i+Rir-bauen.com
2. 2Geschichte - i+Rir-bauen.com
3. 3Über uns - i+Rir-bauen.com
4. 4Aktuelles - i+Rir-bauen.com
5. 5i+R Industrial and Commercial Construction AG - Wikidatawikidata.org