WBI AG is a Swiss planning and engineering consultancy delivering infrastructure, rail, structural engineering, municipal engineering, and surveying & GIS services. Since 1955 we manage all phases from studies to commissioning for public, industrial, and private clients. Offices in Regensdorf, Schaffhausen, Langwiesen and new Herisau ensure fast coverage across Northeastern Switzerland. Services include roads and utilities, urban drainage, bridges and structures, rail infrastructure, owner representation, spatial and transport planning, surveying, 3D laser scanning and GIS

About Us Liegenschaften Treuhand St.Gallen AG was founded in 1975. Since the beginning of our operations, we have been managing real estate in the greater St. Gallen area. Our clientele includes private individuals, condominium owners’ associations, communities of heirs, and real estate companies. Services • Consulting and support • Administration and valuation records • Documentation • Real estate management • Property management • Planning and maintenance • Sales & valuation Whether you need assistance with a single-family home, condominium, multi-family residence, commercial property, or building plot, we provide comprehensive advice in every case.

Welcome to AZ‑Glasfasertechnik GmbH in Amriswil – your expert partner for powerful fibre optic solutions across Eastern Switzerland. From FTTH to FTTS or FTTB, we plan, install, splice, and connect your fibre lines from the central hub to your premises. Whether for homes or businesses, we build future-ready network infrastructures. With tailored consulting, precise execution, and on-site support, we deliver full-service fibre solutions that keep your data flowing fast and reliably.

AndEra AG in Stachen delivers visible quality and precision in window and facade construction. From windows and post-and-beam systems to exterior doors, we offer 3D design, professional consultation, and high-quality execution for new builds and renovations. Combining craftsmanship with sustainability and innovation, we create long-lasting, energy-efficient solutions that enhance both function and aesthetics. Visible quality. Visible added value – from concept to completion.

As an experienced general contractor, we offer comprehensive solutions for new construction, building construction, civil engineering, remodeling, and renovations. Whether you’re building a new home, modernizing existing buildings, or planning your project from scratch – you’re in the best hands with us. With our full-service approach, we bring your visions to life efficiently and on time. Our team of skilled professionals supports you at every stage, from planning to handover, ensuring the highest standards of quality and reliability. Rely on our local expertise and years of experience for construction projects in Amriswil and surrounding areas that meet the highest expectations. Contact us for a personal consultation and see how we can turn your building project into reality!

For over a year, RUTECH GmbH has been delivering innovative and sustainable solar technology solutions throughout Switzerland. We design, install, and maintain customized photovoltaic systems for both private homes and businesses. Our mission: helping you gain energy independence through clean, renewable power. Rely on high-quality service, honest advice, and cutting-edge Swiss technology.