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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,110 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSite PreparationRorschacherbergWilli Bau AG
Willi Bau AG Logo
Verified· 3 sources

Willi Bau AG

Summary

About the company

Willi Bau AG is a construction company offering building and civil engineering services, including excavation, demolition, utility and road works. Its services also include system waterproofing with warranty and project work for commercial and public clients.

AI-generated
Offering

Products & services

Industry:Site Preparation
✓ Offered8
Building construction
Extensions and conversions of single-family and multi-family houses, new builds of single-family houses, construction of multi-family houses and entire developments, as well as retaining walls, staircases and floor slabs.
Civil engineering
Excavation, shoring and dewatering of building pits, new construction and renovation of sewers and utility lines, forecourts, parking areas, interlocking paving stone areas, as well as resurfacing and manhole refurbishments.
Demolition works
Strip-outs of buildings, demolition of entire houses and structures, dismantling of components, integrated remediation of contaminants, as well as reinstatement and renaturalisation.
Commercial construction
Construction of business premises, company headquarters and workshops, renovation of representative building components, replacement of installations, adaptation work, as well as maintenance and facility services.
Public sector construction
New construction of business premises and workshops, school and municipal buildings, transformer stations, structures and works of civil engineering, roundabout and bridge construction, water engineering, as well as response to burst pipes.
Customer projects
Small alterations in bathrooms, kitchens and throughout the entire house, repairs of damaged areas and water ingress, plastering and stucco works, concrete cosmetic repairs, as well as drainage and spring catchments.
System waterproofing
Waterproofing of structural components, remediation of water ingress and moisture, execution of white and yellow tanking, as well as complete system waterproofing for new builds.
Core drilling
Core drilling up to 450 mm, openings for water, electrical and heating services, cutting and separating concrete, as well as use with a fully equipped service vehicle.
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Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 15 reviews across all connected sources

Sources
GGoogle4.915
★TrustpilotSoon
PProvenExpertSoon

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Location

Bachwiesstrasse 13
9404 Rorschacherberg
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:30
Tue
07:00 - 12:00, 13:00 - 17:30
Wed
07:00 - 12:00, 13:00 - 17:30
Thu
07:00 - 12:00, 13:00 - 17:30
Fri
07:00 - 12:00, 13:00 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-210.234.581
Founded
2005 · 21 years
Last commercial register change
March 16, 2018
Employees
51 to 100

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